A platform shared with the Volkswagen ID.4 | Audi e-Tron Q4 Hoist Review

[@areitu]

Jordan and Cory make a great team! I always appreciate Jordan’s deep takes on why engineering decisions are made and truly appreciate Cory going over tiny nerdy details about why triple squares are used

[@jonathanwright7991]

It's probably for an EPB. What do you think? Oh yeah, an EPB. Yes. Definitely for am EPB. I couldn't imagine it would be for anything else besides an EPB. Just ONCE call it an Electrinic Parking Brake so we don't have to feel like ignoramuses if we don't know what an EPB is. Other than that, great video.

[@hansmeijer2525]

electronic, mind your spelling once pls.

[@MarkXHolland]

Came here to say this. We're not all experts. Surely that's the point of these videos? Information.

[@_PatrickO]

EPB is shorter when saying it multiple times.

[@johnw1078]

upvote, to the top

[@casperhansen826]

Thanks, I had no idea what they were talking about

[@yhfsywfit]

I can’t believe how much I enjoy these videos. I’m an engineer, but in a bespoke industry, we don’t have to worry about cost much. But very interesting how cost and efficiency go hand in hand

[@lemongavine]

Anyone can design a bridge that stands. Only a good engineer can design a bridge that barely stands.

[@techiheed1845]

Looked at the E-tron Q4 as it was on my choice list for business. Wasn't convinced it was right for me. Opted for M3LR. So pleased with it, best car I've had, I've owned 25 cars.

[@FutureSystem738]

Ditto! (Except I have an M3P ;-)

[@tlee7653]

Indeed. I drive my wife’s Model 3 as often as she permits. Wonderful car. (I’ve never counted, but 20 must be close.)

[@digital-experiance2390]

Thank you for the video. Well played the back and forth between you two. A delight to listen and watch. 🙂

[@MunroLive]

Glad you enjoyed it!

[@powertrip111]

My understanding on the drum-brake decision is this: 1 - since the brakes on an EV are much less utilized, drum brakes offer better long-term performance, especially after long periods of un-use. 2 - lower rolling resistance, since springs can fully retract the pads from the drums, with no sweeping losses (disc pads must maintain minor contact with rotors). That was what I took away from another discussion on the choice when the ID3/4 launched.

[@Ficon]

You get a ton of rust on the rear disc brakes because they are basically never used. Drums on a non-performance car make sense from both cost and esthetics.

[@slartybartfarst9737]

As I understand brake disc pistons are returned from disc rotor surfaces when the brake pistons square section hydraulic seals that are forced into a rhomboid section in use flex back to their square section when not under operational pressure dragging the pistons back away from the discs. In addition disc pad retention / squeal suppression springs ensure disc pads tend to settle back to the pistons after use thus clearing the disc rotor surfaces. I appreciate sliding disc brake calipers may not exibit the same functionality but in the case of an emergency stop true brake power regardless of regen is demanded and in the case of EVs with the battery in the floor and inherent very low centre of gravity the reduction of forward pitch weight transfer allows a disproportionate (compared to high C of G ICE) ability of the rear brakes to offer great braking capability which will not be maximised with the use of drum rear brakes.............look at Teslas, the rear discs are bigger than the fronts on the Model S, maybe Model 3. Not so sure drums is all 100% best option of an EV despite the reasoning being "they are not used as much as regen does some of the work". Guess the decision depends on total weight / target market, give me discs anyday.

[@tormar00]

You need to clean and lubricate the brake calipers on a Tesla every year or 20.000 km (12.000 miles) if you drive on salting roads. With one-pedal-driving you hardly never use the brakes so drum brakes seems to be a good decision.

[@Dark_Vader888]

What a load of crap. VW's spin is a joke. It's pure cheapeness and cost saving and nothing else. EV's blend braking and regen when the battery is charged high which cleans off any debris or rust. This excuse that rear brakes are never used is utter BS.

[@paultrickett7134]

In Europe we are seeing a lot of customer concerns regarding rear discs corroding through lack of use particularly when customers are using one pedal drive mode. Using drum brakes does improve the aesthetics to the rear brakes and initial costs, while reducing warranty costs for replacement brake rotors .

[@aurelio-reymilaorcabal9669]

Cory is " lean designed" lately, keep up the good work Cory!

[@dwitkowski77]

Jordan - where did you get the UA jacket? post a link

[@Stefan_Dahn]

​@@dwitkowski77What is UA? Ukraina?

[@mriguy3202]

@@Stefan_Dahn Under Armour

[@dwitkowski77]

@@Stefan_Dahn Under Armour it's who makes his shirt.

[@ohhs7830]

Thanks for explaining hydro forming. I do wonder why after all these years we don't have a standardized way to attach the wheels to the frame.

[@koeniglicher]

Because many car models' requirements (at design phase) are different. Therefore: different types of suspension. Many cars do not even have a frame. Wheels then are attached to the body (or sub-frame).

[@Fignewton117]

I love Jordan's use of a laser.

[@DouglasJMark]

At one point I saw it dancing around behind him. Too bad they don’t have a cat 🐈‍⬛ to chase it too.

[@tesla_tap]

Another great video. Likely no one noticed, but it's nice you removed the rods from the jack stands that are at eye level. In prior videos, I always worry someone is going to poke an eye out!

[@charlesrovira5707]

I love watching you because you *_teach_* me consequential things I wasn't aware of. Thanks.

[@MrBadgas]

A well done well balanced and detailed review guys.

[@MunroLive]

Thank you for watching!

[@MrBadgas]

@@MunroLive Every episode. Please take care with Sandy’s schedule. Treat it like a marathon.

[@wildcat64100]

That was incredibly informative. You guys really know your stuff.

[@alistairl]

Thankyou both, and for the series on this car - always nice to have an expert share what they see when they look at something.

[@wongman2001]

7:45 “Death by a 1000 cuts!” Great job guy! Though I do missed the quirkiness from the very early episodes 😂

[@AM_SDG]

Excellent presentation Cory and Jordan. Love the the analysis

[@idkj8293]

18:49 Drumbreaks lower the rolling resistance, have more or less no wear and provide even enough brake power. The regeneration also uses the rear axle. A clever way of saving money, ad efficiency and drums can‘t rust. ;-)

[@krisvandermeulen253]

Great video but I miss the 'before' picture that still shows the protective or aero cladding at the bottom. Maybe a detail but they are also a part of the underside of a car.

[@johnreese3762]

You guys do an excellent job which I appreciate! Thanks a million for the vid! Hi Sandy!!

[@southport3399]

In some other previous videos where an acronym was used there has been a text overlay expanding the full name for the acronym. It would be great to make that a standard! While those acronyms you use are familiar to yourselves for your particular industry, those sequence of letters (acronyms) have other meanings in other industries and can be very confusing for us when an alternate use of abbreviations is the first thing to come to mind and therefore hard to mentally backtrack when you are continuing on with your conversation to the audience.

[@mrm1885]

No need to dumb it down, just say the acronyms and let people figure it out them selfs if they don't know. I'm not even American and I understand everything fine.

[@WaemYt]

They use drum brakes because they cope better with corrosion. That especially a problem in Nordic countries where I see a lot of cars with corroded rear brake disk. Modern cars brake very little on the rear brakes, and EV almost don't. In a couple of years I’m sure we will see EV cars without rear brakes, only the electric motor. Take a look at formula e gen 3 cars.

[@ariip]

But yet our model 3 has 4 wheel disk. It is the most or the 2nd most efficient ev on the road now. Maybe vw had no choice but to try to do everything possible to make their inefficient evs more efficient in every way possible. Maybe they should have concentrated on the things that make the car better for the consumer and left the disc in. I also just checked my pads on the front of our model 3 at 120k miles and the used amount of the usable pad portion is 30 percent. That translates to my pad potentially lasting to 400k miles if continued wear is at the same continued rate. On top of it, the fact is that we carry lots of weight in our car all the time such as a spare and other things, and we also tow a trailer, use a rear platform carrier and carry a canoe on the roof etc.

[@ariip]

You need brakes for panic stopping. You need a way to control braking intensity which regen does not do for you. Unless a paddle is used. Which is another absurd control like on some evs, and would require a whole new learning curve which for driving in a panic situation would be dangerous. Unless you made the brake pedal the regen boost. However regen has issues with cold batteries or full batteries. Then you would need a capacitor to act as a backup but that would involve most cost and complexity especially for oems and create a whole new system required. That would be a terrible mess. I don 't think that is going to happen. Tesla is probably going to reveal its new sensify brake system which is going to change braking in the industry, but that is still a friction system just without fluid and a main brake booster. Check it out if you are not aware of it.

[@ariip]

Also probably on many evs, the motors may not have the regen capability to be able to do a panic stop with enough regen so then the motors need to be specs higher adding cost and complexity in the industry. Trying to use regen as sole breaking would be a mess.

[@ariip]

Formula e cars regen to stop? Do they need to or do they ever slow down that quickly like in panic anyway? They probably only slow down or come to a stop but never slam on the brakes like we do in traffic. So a different situation. Maybe not a like for like comparison.

[@TigerInTheWoods]

@@ariip I live in the NE region and charging is not a problem w/ my 3 Tesla. My neighbor owned Mach-E can not fully charge freezing temp. When charging my Tesla, we pre-condition the car like 30 mins. before charging. That gives us 31 miles/hr. charge compared to 30 miles. I seldom use brakes bcuz it stops slowly when releasing accelerator pedal and recharge my battery (regenerative braking) w/ green light indicator. It worth every penny compared to my 2 MBenz that I sold prior to Tesla deliveries in 2022.

[@vermontsownboy6957]

15:55 - I learned something new today! I thought hydroforming took place with the water being pressurized to push outward against the form. Didn't occur to me to work the hydroforming solution by pressing the form inward against the static water pressure!

[@terrysullivan1992]

Me too.

[@dewiz9596]

Cory talking about Titanium Bolts. .. I had some on a bicycle as stem binder bolts. Great until POW! Snapped. . . could have been bad!

[@bartwaggoner2000]

Steel is under-appreciated

[@nihongobenkyoshimasu3190]

18:09 Recovery Hook: Must be also used as an anchor when transporting on a boat or on a truck.

[@AdamMansbridge]

But unlike most tie downs it's solid enough to pull on

[@brianb-p6586]

That's all it's for. If pulling rearward on it, bumper coverage damage would be likely.

[@MbT379]

Cory, Jordon and team. Looking forward to a tear down of an Electrify America public charging station. Very curious to have your team of experts give their impressions. Thank you. Appreciate your insight, content and informative videos.

[@markedwards4879]

Another good vid once I worked out via the comments what an EPB was. Interesting that they don’t put them on all cars if they are needed on one. While talking about brakes, drum brakes in 2022 tells me that it’s not considered a performance car in any way. I’m pretty sure that the last car that I had with drum rear brakes was built in the 70s.

[@maksimd6033]

Thanks! Great video! Please make video about rubber bushings design analysis from different cars. Rubber or hydro bushings, dimensions, design. It is very interesting especially for premium class cars and EV, because of high NVH requirements

[@ConvincedIdiot]

Oh the irony of the conversation at 13:20... lol EBP you say? ;)

[@desertdan100]

I do get tired of people talking down some things that they really don't know the reason behind the engineering. The rear drum brakes on the rear drive axle have benefits to the design. Just like the design of the front rack and pinion steering instead of fly by wire. Driver feedback is one benefit on the front. Repairability and flexibility on hose connections. Less chance of breakage from impact of road debri. I do mechanic work and HATE , I mean, hate formed plastic tubing after it ages just a little. I can't tell you how many times that crap breaks and cracks. I have seen that stuff just totally snap off, causing a catastrophic leak and failure. The drum brakes on the rear are actually less likely to get stuck on and burn up vs. a caliper system for a disk on the rear. Due to regen braking and less movement and need for movement on the rear axle, disk brakes often get stuck from non-use. They move to apply tension, but due to grit grime and corrosion, they don't move back or get stuck in application. Less brake for is used on the rear in most all vehicles. The drums are lightweight and help keep debri and crud out of the brakes. Sometimes engineers don't look at why things are chosen. They just see old technology that needs to go. I work on vehicles in the rust belt, and I have more issues with new brake caliper systems than I ever had with Drums. I bought a KIA spectra brand new in 2010 and it still had rear drums and caliper fronts. I never had trouble with the rear brakes or the manual safety hand brake. I actually had to use the hand brake to stop my car once because a brake line ruptured and I lost my fluid.

[@howru7932]

I think that they advise OEM's for the most cost efficient production methods. Probably the repairability isn't a big concern if you only look on process improvements. As far as i know some OEM's like Continental are testing future drum brake systems...a lot of "city" EV's have rust problems with disk breaks since they are not utilized that much. I think we will see cars which only use drum breaks soon. Another benefit of drum breaks is the lower impact on the environment, since the break dust is contained as far as i know...but must be a nightmare for the mechanic.

[@xxwookey]

Well said. The EPDM pipes may be heavy but they can last a long time so long as the clamp is not cutting the end. I've got originals on my 25 year old, 190000 mile van. Maintainability matters too. I'd put a lot of care into minimising lengths, but stick with the EPDM pipes for the best weight/longevity/reliability mix.

[@maxims.1045]

Drum breaks in the back of an electrical vehicle is not e dumb idea tho. cause of less usage of breaking in general youll get allot of rust on those. In this case its a good decesion in my opinion.

[@HubertHeller]

Crush can is an automotive part located behind the bumper of automobiles like cars, trucks, jeeps, buses, etc. on each side. The purpose of crush can is to absorb impact energy in smooth way.

[@riedlrob]

Great and informative video, thank you! Although I disagree that the reduced material screw heads are a good idea..... these are a real pain to work with as soon as corrosion has kicked in (speaking from experience with my Audi A6). You have to be soooo careful not to ruin the screw head.... because if you do, you have to change the whole thing!

[@lillebrorjensen7063]

Drum Brakes is a benefit specially here in Denmark and (North Europe) Because there is a very low wear in rear disk they tend to RUST, especially in electric cars because off regen off braking is takin over so maintanens is high on disk in the rear even on Fosil cars here ! In winter time we have a lot off salt spread on the road (de icing) and that is agresive too disk too...

[@stprinz]

Very well done teardown. Love the insights and the chemistry between you two is great. I agree drum brakes don't look pleasing, but they actually make a lot of sense in a EV, where a lot of the breaking can be handled through recuperation of the electric motor. They are lighter, cheaper and more durable. You still could argue it looks wrong on a 50K+ car lol

[@brianb-p6586]

For even better fake-disk look, the visible drum face could be turned.... but it would need a clearcoat to prevent rust. I think that would be hilarious.

[@boredKiwi]

Just today an Ioniq 5 owner complained of his car sliding partly down the driveway when he got out after parking it. The EPB is only on the back wheels along with the parking pawl, same for both RWD and AWD models. A front EPB could be useful for those who live in freezing areas. On another note, the battery cooling panel appeared to be outside the pack enclosure, as it is on the new Niro EV and most likely the new Kona, the idea being to avoid needing a low-conductivity coolant.

[@userscott]

"It's about as basic as an automobile can be"... says it all about VAG group cars and the knowledge of the buyers, especially in the Audi marque....

[@danielcurtis4179]

As a automotive tech for 30 years. Coolant quick connects are great when they are new. They leak when they get some age on them. Spring clamps are a pain to work on but they last the life of the vehicle most of the time.

[@danielcurtis4179]

The old hand tightened hose clamps are the worst because they have to be retighten. You can put a car together on a summer day and those hose clamps will be loose and leaking in the winter. The rubber shrinks when cold and makes the clamp loosen.

[@boredKiwi]

@@danielcurtis4179 they're worse because install tension is hard to control.

[@battousaihimura]

Moving to CO2 is great. This should help/improve cold ambient CoP compared to r1234yf. The refrigerant lines to handle to CO2/r744 on the high side can be upto 100bar. Need more optimization from EPDM to nylon based on coolant side, more packaging optimization

[@davidlowton3423]

Thanks Cory and Jordan, great video. I also don't understand why Drum rear brakes on a prestige vehicle.

[@cascade5682]

Best guess about why the rear drums is because of quick response regen braking doing heavy lifting first.

[@johnpublicprofile6261]

Demoting from calipers to drum brakes seems to be a frequent trend for EVs as they are now a top-up to regen or even just mainly a parking brake, so why Waist cost on unneeded calipers.

[@wtmayhew]

I’m not offended by rear drum brakes. Many applications with rear disc brakes require an integral mini drum for the parking brake anyway. I’m thinking of the 2015 Nissan LEAF which reverted back from EPB to traditional foot applied PB. The ID.4/Q4 with aggressive regen braking might see the rear drums last 150K miles or more before they need service. I doubt the anti-fade benefits of rear disc brakes would be more desirable than than the benefit of having zero shoe contact of the drum brake when the brakes are not applied.

[@__--JY-Moe--__]

well cool ! I'm learning something! super overview guy's!

[@oijhhytdirhrbru]

The frontal design seems to aim at crash compatibility, after that the IIHS 25% test is taken into consideration(remember they don't use front rail as a direct collision energy absorber with MQB/MQBevo or MLB/MLBevo)

[@MXP90DL]

Just from a drivers perspective using this car, I would feel the drum brakes foot response to handling twisting roads. Not even sure the anti skid features would work well with these drums. It seems like taking a term digital braking with all its quickness and gentle response and dumbing it down with analog drum brakes. I think this could cause spinouts as an example.

[@boredKiwi]

It's an AWD EV that will use regen on all wheels at driving speeds. You won't get to feel those drums.

[@Heckofadeal]

Great Job !!

[@MunroLive]

Thanks!

[@brianb-p6586]

The eyes @18:09 are not recovery points (and are not hooks of any kind), they're for tying the vehicle down during transport. The single recovery point is the removable part that goes into the bumper face. This is normal practice, at least for Japanese vehicles.

[@mrm1885]

Would be interesting to see how all that stamped steel looks after a few winters in the salt?

[@JoeJalopy]

Now I have to buy another set of sockets if they use internal triple square.

[@FutureSystem738]

Thanks for a great video. However I had to read through comments to find out what an EPB was….. 😅

[@rogerbethell3848]

what does jordan think of his personal model 3?

[@richardkule9384]

Yeah, come on Jordan; we need a report on the Model 3 P.

[@EricP36]

Good video guys!

[@MunroLive]

Thanks!

[@AndrewHelgeCox]

Is there any risk of galvanic corrosion with aluminium and steel parts in contact?

[@vast634]

A car with drum-breaks, thats a classic, must be from the East German production line.

[@MichaelAllen-td1uu]

The “toe hooks” underneath are for tying down vehicle for transporting.

[@brianb-p6586]

They meant "tow hooks"... but yes, they're tie-down points.

[@wtmayhew]

The machined mounting points look like they could be for ZF’s front axle electronic parking brake actuator. I can also see why VW/Audi didn’t use it, given the fairly significant unsprung mass increase and that it needs a flexible high current electrical connection. A little money could be saved by casting but not machining and tapping the bosses for applications not using FAEPB, but then that means inventorying and space for the parts variants.

[@bernhardreinel]

ZFs front axle EPB seems to be just a very compact version of a rear axle disc brake EPB and uses the regular caliper mounts. My guess is that it wasn't available when the knuckles were designed and VW initially planned to use additional calipers just for the EPB. The knuckles are a common part between ID.3, ID.4, Q4 and Enyaq and must have been designed a few years back already. (Part Nr. 1EA407258H) Eventually they went with Continental's drum brake EPB on the rear axle and probably didn't want to change their design and tooling. Maybe the machined surfaces and threaded holes are even used as references during machining. Just my wild guess. 😉

[@wtmayhew]

@@bernhardreinel Thank you for your detailed answer. Much appreciated.

[@MrFoxRobert]

Thank you!

[@MunroLive]

You're welcome!

[@Northbaylandscaping]

I'm sure the switch to drum brakes for Audi cost and the fact the biggest complaint in Norway Ev owners have to service disc brakes annually. I do every year on mine sometimes twice.

[@mrm1885]

Basic like a VW Golf to save money. But the chrome grill turned up to 11 for the American market :) so it will sell.

[@idonotcarenow]

You guys should’ve talked about the 1million bolts, fasteners and small plastic pieces all over the bottom front of the vehicle, absolutely nuts.

[@MrSnicol]

Where do you attach the horse??

[@Martinit0]

That's what the Audi rings are for. Up to four horses. VW brand: only one horse.

[@jugglinglessons]

What is an EPB please? (Electric Parking Brake?)

[@Iamthedude]

Yes

[@kevinsears4779]

These guys use a lot of industry specific terms and worst yet acronyms. They need to remember their audience is broader than gear heads.

[@jugglinglessons]

@@kevinsears4779 This channel is so good at spelling those out, I use them as a great example. The only better show in my subs about spelling out acronyms is TMRO that covers spaceflight.

[@abraxastulammo9940]

It will be interesting to see what differences the MEB based FORD (only in Europe?) will have.

[@stprinz]

Yeah, afaik these will be sold in Europe only.

[@lrw0]

Please add a glossary of acronyms to the written description of your video. This would be useful in most/all of your videos.

[@SDSBBQs]

Can you guys please say Electronic Power Brake at least once then start using the acronym so we can make sure we ALL new and old watchers of your videos know what you are talking about? Please and Thank you.

[@brianb-p6586]

No, because EPB doesn't mean "Electronic Power Brake". It's the *parking* brake.

[@richardnedbalek1968]

“Walking under Cars with Boys” 😉

[@HubertHeller]

EPB. Electronic Parking Brake

[@eclecticcyclist]

Thanks,. I've been Googling for almost ten minutes!

[@christhomas5804]

Wow - I never thought VW would move to CO2-system. Would be great if Tesla would also get rid of R1234YF...

[@ariip]

Great video. You guys managed to not knock the car as much as they did in the other videos. Maybe it needed it just the same.

[@billinfarmington5189]

I am not an automotive engineer but have enjoyed watching your videos I guess pretty much since you started them. However, while I generally can figure out your acronyms, this particular video seemed to be more littered with them. I know (coming from an acronym littered industry) that it is easy to think everyone understands them but it is not true. Perhaps you could develop a list over time of your most obscure acronyms that could be found by a link in the notes of your videos. I know it would help me and likely many others. I still can't figure out EPB, SORB, EPDM. You guys try to explain them but some get missed. Even Corey mentioned the need to at least mention once what an acronym stands for. Thanks, Bill

[@koeniglicher]

Electronic parking brake - prevents car from moving at standstill Small Overlap Rigid Barrier (certain type of frontal crash test in the United States, where one car overlaps with other by only 25%) EPDM rubber (ethylene propylene diene monomer rubber) - a certain type of rubber

[@billinfarmington5189]

@@koeniglicher Thanks, helpful. :o)

[@roddirodman4247]

The comments about the drum brakes make me question how knowledgeable the Munro people actually are. Or they are in one of those wheatherless desert states of the US where vehicles never get wet. I live in Germany and I need to change the rotors of my front brakes on the Zoe now because they are rusted. The rear drum brakes? No problems, going strong. Just saying.

[@Georgewilliamherbert]

Have you never heard of Michigan?…?

[@pjrebordao]

I want an EPB ! Whatever it is...

[@DouglasJMark]

My mom and my own family have owned 3 Audis. Our current 1998 A4 2.8 L V6 with 160K kms still runs pretty well. It’s a bit sad that this Audi is more VW than Audi. But, it’s a start. I really think losing Herbert Diess was the end of VW 😔

[@jaimepena1877]

Cool vidios

[@williamscoggin1509]

Younger people may not realize but those of us who grew up with drum brakes realize they do not work as well and they have many more parts are going to fail. Large number of inventory parts that could be done away with and not even had to be ordered or worried about whether or not you can get them. There is a reason why disc brakes dominate not just because of better stopping ability but because of all of the parts that you get rid of that were always failing.

[@41istair]

What is the cause of Rivian's grossly excessive parasitic losses when left unused and not plugged in? This issue seems to be well known and discussed for months but I don't recall any Munro mention of it. The degree of reported power drop would keep those guilty components warm enough to be detected by a thermal scan? As these vehicles "call home", how does that power draw vary with distance from the nearest corresponding 2G/3G/4G/LTE/5G mast?

[@oijhhytdirhrbru]

The EPS is a single-pinion EPS, which is a good cost reduction that no such heavy cars has implemented single-pinion EPS before, they use at least DP-EPS or better ones like RD-EPS or RP-EPS. Personally I don't find it very well on the steering feeling of MEB cars like ID4 or Q4 e-tron

[@Firestorm637]

When you hear that a Tesla is made in 10 hours vs 30 hours for ID.4 all these extra connections slow up the line.

[@brianb-p6586]

No, it's not "about as basic and standard as you can get from an automobile" (@19:02). It could have a much more basic - and very common - torsion beam rear axle, for instance.

[@steveb6989]

Don’t drum brakes have lower draag because the shoes fully retract via springs when they aren’t applied?

[@boredKiwi]

disk brakes have springs that lift the pads off the disks

[@DennisSantos]

Why rear drums on such a premium vehicle?

[@Manatek]

Please strip down a byd atto 3 1year old and look for the rust between panels were there bolted together I need to know whether it's a throwaway 5-year car

[@michaelhess4825]

Using all these "cheap" methods makes me think they are just trying their darndest to become as profitable per unit as Tesla. If it gets the job done, and lasts, who cares right?

[@nickmcconnell1291]

It is sad Audi has to use very “Plain Jane” parts on a $60K+ car to be competitive. Just shows how advanced Tesla is in manufacturing since Tesla has higher margins (though similar price, if not lower at similar trim level). But more than anything it is the software interface and OTA updates on the Tesla that obliterates the Audi.

[@areitu]

It’s always a delicate balance of cost, performance and engineering

[@funnyguylol69]

Tesla is literally doing the same thing. Don't blame the player.

[@mrm1885]

It's just a basic VW with a chrome grille turned up to 11 for the American market.

[@williamscoggin1509]

Terminology question, what is an EPD?

[@brianb-p6586]

"EPD" doesn't mean anything (at least in the context of this video). "EPB" is "electric (or electronic) parking brake".

[@BlazerRox]

15:47 Why is there rust between the drive unit and output shafts? Galvanic corrosion?

[@boredKiwi]

this is extremely common and entirely harmless.

[@Banarsky]

What's EPB !?

[@Cross-xm2fr]

It's the Audi ID.4

[@AaronCocker]

EPG? Electronic Parking Brake?

[@wildcat64100]

What’s EPB?

[@epoxy1710]

Spring claps is much better, can be used over and over again. Not cheap plastic quick connectors.

[@thomasdavidbassett483]

What is an EPB

[@RayNLA]

This will be the last press vehicle Munro will get from the VW group

[@Ask-a-Rocket-Scientist]

EPB - electronic parking brake

[@Broliathos]

Thanks for the very nice video! Every time they say aluminum I cringe inside because its called aluminium :D

[@bradstewart7007]

Try reading up on the history of the different spellings; it's a Google away. And the word "soccer" is from the UK and was used interchangeably there with football as recently as the 70s.

[@TrevorReaStewartnexus]

On electric vehicle the rear brakes do basically nothing. Because even on an ICE vehicle the front brakes to 70-80% of the braking. Now that the rear wheels are doing most of the regen, the rear brakes likely have to be there to pass regulations. Because they don't get used they rust and seize, even in mind climates. I've seen them rusted to the point of needing replacement at 15k to 20,000km with little to no wear on the pads. Because the brakes aren't used the pads dont contact the rotor enough to keep rust from forming and the backing plates for the pads rust. So in my opinion the drum brakes in the rear of an ev make more sense. But time will tell. What I would really like to see if VW group EV's to use the tungsten carbide coated rotors released a year or 2 ago from Porsche. That would keep them from needing replacement before they are actually worn out. But that would cost more. On an Audi I could see it, but ID.4 probably not.

[@xxwookey]

Amusing the way the driveshaft ends have gone rusty already. Doesn't really matter, but it doesn't look great.

[@boredKiwi]

Almost every car does that. Have a look under yours!

[@xxwookey]

@@boredKiwi Mine is 25 years old - I expect stuff to have gone rusty by then - this one is almost new.

[@jimbert50]

CO2 coolant is interesting. I haven't heard of that before.

[@pablopicaro7649]

R744 was used long ago, but it has a problem, extremely high pressures needed, and that is a big difficulty.

[@areitu]

It’s the new y1234f refrigerant that’s slowly replacing r134, and the Germans seem to using it first. It has far less impact on ozone, and nowhere as flammable as some of the other r134-equivalent

[@xxwookey]

GWP (Global Warming Potential) of 1, so between hundreds and thousands of times better than most of the alternatives, when the coolant inevitably escapes eventually. A lot of new building heat-pumps use it too. Also non flammable, unlike propane which is otherwise a pretty good option. The main downside is high pressure needed, so it probably leaks out faster than older refrigerants.

[@mrdot1126]

i am not a car guy, thus i am surprised that this around 1 year old car already has a part with really visible rust... is that normal?

[@brianb-p6586]

Yes. Cast iron parts are routinely not coated, so they form superficial surface rust immediately.

[@MonsterSound.Bradley]

$60K? You guys are too kind. I mean it.

[@tarassu]

I love drum brake on my 2012 EV. No servicing. No need to do anything. Especially salty roads that ruin caliper sliding surface slide.

[@karmakh]

What's an "EPB"?

[@MunroLive]

Electric Park Brake