Looking at the rear brakes on a Hyundai Ioniq Electric 28kWh

In this video I look at the rear brakes on a Hyundai Ioniq Electric 28kWh. A common issue with these is squealing rear brakes. A viewer told me his Ioniq had a "modified part" installed by a Hyundai dealer, to cure the problem. I ordered these and they were just a replacement set of brake pad return springs and were identical to the originals. The only difference between these (58288G7300QQH) and the originals (58288G2300) is the quantity in the pack!
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[@duneplodder]

Thank you Matt. I have a 4 year old 28kWh so very interesting for me.

[@krisvandermeulen253]

Useful information! For the moment my Ionic classic 28kWh with 95K kilometres is not having this issue yet. I do hear the disc pads popping of the disc after a night when the parking brake was on.

[@michaelbruton3537]

Thank you Matt for this video It has given me an insight to the rear brakes on the Ioniq At least by having rear disc setup it's less hassle than rear drums that have seized on lol

[@Alex-tj1zo]

One more time, spot on where it matters ! Great video. Cheers mate !

[@michaelbruton3537]

Have Hyundai changed the rear brake system on the 39kw Ioniq's as the rear brake problem on the first gen 28kw should have been picked up by Hyundai It will be an interesting fact finding for a future video as to whether the Ioniq5 suffers the same trait Thanks again for your detailed video's

[@GoGreenAutos]

Its been a long time since I've worked on a 38kWh model, but from memory, the brakes are identical to the 28kWh.

[@michaelbruton3537]

@@GoGreenAutos Thank you Matt

[@mamdouh4120]

Thanks for the video Matt. 18:44 It can be shortened to 5 minutes if you work more than you talk.

[@BareGoggen]

Not all superheroes wear capes. Thank u!, Matt, love the Ioniq, have one my self👍🏻😀

[@Nikoo033]

It would have been interesting to see the state of the pads after cleaning and greasing.

[@richardhaywoodh]

Really interesting. On the 1999 Toyota RAV4 EV Toyota fitted aluminium brake disks, this stopped corrosion from infrequent use as the regen did the majority of the braking, the rear brakes were drums which were low maintenance.

[@sgsuper1150]

You want to replace the pads/disc. Pads get easily contaminated and very often rust and fall appart but look fine.

[@dot7107]

Problem is too tight fitment in front and rear brake pads. I had to replace rear discs and pads and I used angle grinder to shorten pads mounting ear so that those are little loose to sliders.

[@GoGreenAutos]

Yes many pad ears seem too tight. I've filled them too before. But I wonder by taking the paint off, that will probably make them rust quicker and then swell slightly, so probably not gained much. When I've filled them, I paint too, but I suspect they soon rust.

[@ugcamige]

Have you had success with them since you used the grinder on them?

[@dot7107]

@@ugcamige mine modification works fine. No extra noises and pads are sliding nicely

[@doosanengineer7659]

Just clean up the pads until they slide nicely in the holders, simple. You will have to file the rust off, wire brush won't touch it. Of better still just put new pads in and stop being tight.

[@patrickh7368]

Quick question , is the car switched on to service brakes..? or how do you stop the vehicle applying the electric hand brake by itself….?

[@GoGreenAutos]

Yes I would leave the car switch on with the handbrake off or put it into service mode with the diagnostic scanner which winds back the park brake servo.

[@AzizIzgin]

Your channel is really awesome and I appreciate all the work you do. I own the same car and so far I’ve given the car to my Hyundai dealer to do the service but this time I will maybe do it myself or let a cheaper service workshop do the service. Mine is a 2018 model and it has gone around 9500km and the service light is now lid. Is there a chance you do know What needs to be done around these kilometers with this car? Is breaks and pads standard maybe every time you do the service? I’ll understand if you don’t have the info. The ln maybe I just can google it and find a checklist. You are way more reliable than some dealerships 😉 and I don’t want to ask Hyundai how many steps they will go through 🙈🤭🙏🏻

[@GoGreenAutos]

When out of warranty, distance (km or miles) doesn't really matter with an EV when it comes to servicing. Time between services is more important. Your brakes get used very little so rust and seizing pads can be an issue so a strip down, clean and lubricate brake pads is needed every year or so. This is something main dealers don't do as part of a service. A new cabin filter every 1-2 years. Check brake fluid for moisture content. Change the reduction gearbox oil every 80-90,000km or so. Change the motor coolant every 5 years.

[@AzizIzgin]

@@GoGreenAutos the motor coolant… I should then ask Hyundai since they did last service one year ago and the car is 6 years old . Gear oil should also then be changed now… hmm wonder if they did anything of the things you mentioned… thanks for priceless info as always.

[@AzizIzgin]

@@GoGreenAutos does this also apply to a Tesla model 3 2019? 😅 Just bought one 4 weeks ago and the seller told me that the car should tell me if it needs anything. I guess that breaks and filters are the main this to check… If there are known issues I couldn’t prevent such as incidents with AC systems or other things that is good. Only downside to Tesla so far is that the battery drains a lot more than the ioniq just parked even if sentry mode is turned off .. I’ll try to remove third party apps etc… I’m too new in the “Tesla-ecosystem “ but have to learn at some point:)

[@Chris-ly8wt]

I don't think the wire springs is the issue. There's nothing about the design that would cause the pads to "rust" or stick to the rotors. What might be happening is those brake were never serviced, where they get cleaned up and regreased on the contact points where the pads and calipers meet.

[@tonydebreceni8966]

i cant believe you didnt remove the pads and lubricate them. i kept listening to u say same thing over and over waiting for you to yank the pads off and you didnt. ahahaha. Thanks anyway for the explanation. it is good t know how to gain some range.

[@patrickh7368]

I feel that EV’s could have double cylinder drums all round, powerful springs kept shoes off drums and as you say regen takes most of the braking forces. My first car was huge and only had 4x drums no servo and they were excellent at stopping in any situation 🤔

[@bernardcharlesworth9860]

Rolling road and thermal test please

[@iamme2522]

Mine clunks in the morning when I release the brakes. I was hoping to see a fix 😔 I'm currently at 27000 miles and haven't messed with the brakes but have it on my to do list

[@frankradcliffe1374]

My 38kw Hyundai ionic single blue light on dash flashing whilst not charging

[@GoGreenAutos]

That is showing that its topping up the 12V battery.

[@judebrown4103]

Seems like there's an opportunity here for someone to come up with a more efficient design, Matt... 🤔 Cheeky side note: be great if you could use a camera stand so we could watch you do the service.. 😏😊👍

[@rangleri]

Drum brakes is the best design for the rear axle of an EV! It is frictionless, has simple+strong hand brake and parts are protected from water.

[@judebrown4103]

@@rangleri yes, you're right of course. Don't know why they don't just fit them now on EV's. Matt does mention them in one of his other videos, possibly the Kangoo brakes one that he spoke about here. He may have come up with a suggestion why but I can't remember off hand.

[@judebrown4103]

@@rangleri do you think it might be because they're heavier that they don't get used? If that's the case I would have thought that the lack of friction and build up of friction causing material would be preferable.

[@rangleri]

@@judebrown4103 Yes he has done so many amazing detailed and helpful videos! He deserves way more views and subscribers.

[@rangleri]

@@judebrown4103 Hmm, I don't think they are that much heavier than a disc brake setup, some drum setups can be even lighter than a disc setup. It seems that the new and expensive VW id3 and id4 also have rear drum brakes - and it is a very lightweight material drum design. Also some of those Audi e-Tron models have rear drum brakes. Many Renault's EV's have had them, maybe simply because the company uses their widely available parts(Zoe had same drums as Clio) Kangoo original had drums, so the EV version did as well, many Dacias had drums etc.. So maybe they used drums because it was cheaper option but it has also advantages for the car's owners too!

[@dominikhejl5748]

this is even worse problem on some i30's rear brakes. worst case, you have to use hammer and screwdriver =D here in CZ we do maintenance on brakes regulary. these ioniqs are fairly reliable cars with few issues. on all ev's brake maintenance is critical for brake longevity.

[@onoix]

My 66 plate just failed the mot. No rear pads…150k on the clock

[@dlittlester]

Would it be possible to just open the springs up a bit to give them some more tension?

[@GoGreenAutos]

I tried this this morning. Using some pliers, the spring did open up wider, but as soon as you squeezed it, it went back to its original.

[@yanitsvetanov1162]

@@GoGreenAutos Hmmmm, looking at the springs and the brake pads, I think there might be just about enough space to do a slight modification yourself. What if you mount two additional springs in between the original 🤔?! This will require drilling two extra holes in each pad and most likely shortening the springs to accommodate the additionals but it will increase the outward tension. If anyone has a better idea I will be happy to hear it! Because this car is in my mind and I need to gather as much info as possible about its maintenance before I jump to purchase it!

[@johnfaulkner6776]

I knew, I didn't want an electric handbrake on my Kia Soul, but now I know why! I bet my Kia dealership wouldn't be across any of this.

[@michaelbruton3537]

Hi Matt Sorry this comment has nothing to do with your video Recently you mentioned to me that your Ioniq had to go in for a recall How did it go With my identical model and year it was booked in for an end of warranty inspection plus 2 recall issues Yesterday Hyundai cancelled the schedule visit saying they hadn't received the parts needed to go ahead with the work What parts are needed ? Did you pursue your recall at the time ?

[@GoGreenAutos]

Ours isn't going in for the recall job until 2 weeks time.

[@neddyl1225]

Is it safe to leave the parking brake off when it is in Park, switched off and on level ground?

[@GoGreenAutos]

If level, yes.

[@Alex-tj1zo]

@@GoGreenAutos I am also doing that whenever parking on a flat level ground 😁👍

[@richardhaywoodh]

Many EVs eg KIA E-Niros & KONAS put the electric handbrake on when you turn the car off, some even apply the handbrake when Park is selected. Would you have to have the car ON/in Ready Mode, turn the Handbrake off, leave the car in Ready mode and then remove the caliper? (Otherwise I cannot see how you can keep the handbrake 'Off' so you can remove the caliper? Also a bit of a worry if the car was turned off by accident when calliper was off the car but wiring plug still connected as the car would apply the electric handbrake and push the pistons out of the calipers, total nightmare!)

[@GoGreenAutos]

You can put the car in Neutral, so the handbrake doesn't come on. Or If you have a diagnostic scanner, you can put it in "handbrake service mode" where it is fully wound out.

[@ahmedtauseef]

Good quality pads don't stick that easily

[@norgeek]

What's the torque specs on the caliper bolts? I'm having trouble finding a good source

[@GoGreenAutos]

Front caliper guide rod bolts 21.6 - 31.4 Nm Rear caliper guide rod bolts 21.6 - 31.4 Nm Front caliper assembly to knuckle 98.1 - 117.7 Nm Rear caliper assembly to knuckle 78.5 - 98.1 Nm