Talented BMW Tech Diagnoses, Repairs and Tunes A Mint E39 M5 For A 139 HORSEPOWER GAIN On The Dyno!

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In this video, my good friend OJ diagnoses, repairs, modifies and tunes a totally mint 2000 E39 M5 and gains literally 139 wheel Horsepower. OJ started with BMW and then went on to open one of the coolest shops in the country, Fluid MotorUnion in Naperville Illinois.
If you guys need anything repaired or modified on any type of car give them a call at 630-305-3054.
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[@LegitStreetCars]

Guess what my 409,000 Mile M5 made. Oh and what's Gregs car worth?

[@peni80085]

342 rwhp, 47k$

[@terrancesimmons1]

338whp, 60k

[@crownhic6827]

305 hp and his car is worth whatever Carmax will give.lol

[@rohittaurus911]

About 350 Whp, And Ask Hoovie, he will overpay :P

[@isaacbenjamin389]

320rwhp and his car is worth $39k

[@justinsellsreo]

nice to see professionals actually fixing/improving cars, not just talking about it.

[@augustecomte3841]

These two are the best :)

[@StoneCoolds]

thats why we love LSC channel :D

[@MrOguuuuz]

Man I wish you could've added Greg's reaction to driving his car with the extra horsepower.

[@victorivansson3247]

Was waiting for just this. Such a letdown

[@gregnatonson6970]

Greg hasn’t been seen in days. By tracing his credit card charges at gas stations we can se he has been making his way toward Germany for a blast on the autobahn. Seriously, I’m totally stoked. It’s like the car I always dreamed it should be after seeing the BMW Guy Ritchie movie-ads when the car was new. I wrote a song for OJ as well.

[@GarryMcGovern]

Having not noticed that he only had 200 horses for the last 3 years, I doubt he actually drove it any differently AFTER the tune either: how could you not notice your M5 was pumping out less power than a Golf GTi?

[@johnbcardin]

Orfan Productions when you look at the torque pre tune it was around 260-280 in the 2000-3000 range which was not terribly far from the tube torque in that range. If he was using it as a cruiser/weekend car it probably didn’t feel off in that lower rpm range which probably masked the problem. I was really hoping we would get his initial impressions too.

[@GarryMcGovern]

@@johnbcardin Are you seriously trying to make excuses for this? That in 3 years of ownership - cruiser/weekend car or not - he never once accelerated past 2/3000 rpm? Yeah, ok man, you're right: it actually is totally understandable that he had no idea his car was 40% down on power the whole time.

[@ItsMikeArre]

I fkn love OJ man the man knows his stuff looking forward to the 400k Dyno run

[@TheHeretic435]

E39 Guy here. Now this channel really is legit.

[@ShiftedPerspective]

Same here! I have a carbon black 2003

[@seanwilks7712]

We have a stable of e39s. Best chassis in my opinion.

[@Streamlined955]

That guy is the BMW Whisperer. He predicted what was going to happen before it actually happened every time. I wish I lived near to him.

[@jibmaster]

Mad respect to OJ and techs with this kind of brain.

[@FluidMotorUnion]

Thank you!

[@rammphillips3002]

Brian, Alex, I just watched this vid again cuz' I couldn't remember what was in it the first time I saw it. I literally got up out of my chair and genuflected to OJ as he made the last run. One of the best vids you have made! Bravo, bravo!

[@robertastk]

Want to hear what Greg has to say after he drove his NEW M5.

[@celicasaur]

No word of a lie, my M5 had an Alpha N tune already but it generally was sluggish and very lacklustre to drive, even after fitting a 3.62 rear end. However once I'd done the IAT relocate mod and disconnected the MAFs, it genuinely started to come alive. It was improved for sure, but at the back of my mind, I thought maybe the cam sensors needed changing or something. But then today I wanted to replace my steering wheel, so I inadvertently reset the adaptations by disconnecting the battery. When I went for a drive in the evening, holy moly it really was a spectacular night and day difference. First gear is a blur and second gear gives me such a shove back in the seat that it brings a huge grin to my face. I wouldn't be surprised if my M5 showed similar gains on the dyno like this car here too.

[@NikoBellaKhouf]

I kept telling mechanics that my car was sluggish. Their response? "Oh hehehe you're just used to the power so it doesn't feel as fast."🙄😒 Great to see someone who knows what they are doing.

[@juanc5149]

Hoovies garage and his anemic e63 AMG needs to see this!

[@KenitoElGrande]

Alex, thank you for bringing us some M5 content. I'm a AMG person myself but I've always loved the E39 M5 😍

[@StephenJohnson-jb7xe]

This is one of the most joyful videos I have watched for a long time. I truly hope people recognize what a master OJ is and take their business to him. It would have been nice to see what, if any difference cleaning the MAF sensors made before the delete and tune.

[@rammphillips3002]

"...joyful..." I second that motion!!! Got misty-eyed watching the great camaraderie between all three of them!

[@woodsoncircle]

I had a 2000 BMW M5 a few years ago- 2nd owner. Bought it from a Doctor up in Michigan. I recently sold it ... like a fool. Still a beautiful car.

[@TheKeenMechanic]

Great video mate. I love the old school BMWs. I own a few BMWs (e38 740i&e39 530i) myself and currently doing some major work on my E38 740i. I would love to own an E39 M5, this has been my dream car since I was a child. Very educational video. Keep up the good work.

[@tommynyc3313]

0:51 Wingless GT3 RS...It’s Beautiful without the wing😍

[@MilesHarrelson]

When they said, “It’s like you’ve been driving a 540i!” Hahaha only hurt a little bit, I’m okay. 😂😭

[@nastilyasperated2215]

I felt attacked

[@live2ridegsxr1000]

I've had an e39 540i 6spd for 15 yrs. That comment hurt my soul. Good news is, I pick up my e39 M5 tomorrow

[@S_Kane]

the hp gains brought a tear to my eye 😢. this was a beautiful day

[@vbsource6209]

My E39 M5 made the same 343WHP on the same dyno (DynoDynamics) with Alpha-N. Besides tune and rear mufflers my car is bone stock too. Great video proving the point of this channel once again: enthusiasts over stealers!

[@FluidMotorUnion]

good to hear the feedback since people seem to dislike our dyno numbers!

[@vbsource6209]

oahgfojsdljknsdlfw Around 88k miles.

[@gregnatonson6970]

Amazing! Love the consistency.

[@guilhermecosta4252]

I normally don't hit the like button on KZbin. But I gotta say, this was cool. Well deserved the like. That's what experience looks like. Good Job, OJ.

[@lenwoodcruze3594]

....? And why not hit the like button on KZbin?

[@Doonie310]

Lenwood Cruze he’s a bitter and doesn’t like to support anyone

[@torygyberg8837]

Well OJ has a new customer for life! Love it when OJ is in the vids!!

[@beardedspeed]

man what a classy shop, grade A quality, skill, and knowledge

[@factoryminis3437]

Make an addendum with him driving it, so we can see his reaction to 139 hp increase.

[@leo-lx6xz]

Hey Alex great video, wich adaption did oj reset? He said the ecu... But I can't find any way to reset the ecu with the bmw inpa software. Only mass air flow or lambda... Could you please explain what exactly he did? Maybe you could do a video with oj .. 😉

[@jakejoint]

These guys are akin to physicians diagnosing and treating a human ailment. Their knowledge and skills seem amazing!

[@robertpendergast6409]

Coming from a lexus guy, your bmw engine sounds beautiful

[@metalmania305]

OJ is what an excellent mechanic should be. Damn he's the man, props to him great job

[@snowbaordguru]

Not a BMW or Merc, but I had a faulty DPFE EGR sensor that didn't throw a code on a Ford. Always thought it didn't feel right power wise and boy was I right. Massive difference in power and MPG when I changed out that sensor.

[@westerberg9447]

Reaction video on the gain?!?! :D

[@typedrew]

Rasmus Werner Eliasson this please

[@euroshark1]

That's just sick. OJ is the M5 Man. Great vid.

[@Stannely1]

14:46 It's like you took the words right out of my mouth Thank you for asking that question

[@erikwallebom]

I've had two E39 M5 and both had dirty MAF's. To check the status of the engine power output you can use the service menu in the instrument cluster (google it). Find the real time liter/hour measurement. At full throttle in 3rd gear (or whatever gear) at max rpm it should consume about 160 liters/hour. Mine did 100 liters/hour. I cleaned the MAF's and it was restored to 160l/h and surely felt quicker.

[@MrMaDSEGA]

Thumbnail says "Try this one trick, it only takes 10 seconds" then I open the video and it's a 16+ minute video 🤭🤣 Great video though 👍

[@TheFrenchPug]

The dyno guy is the bomb!

[@FluidMotorUnion]

Thanks!

[@DarthRaven2]

We need his reaction of driving the car ..would've been awesome to see what he thinks after gettin that much power back !

[@basithph8958]

The E39 M5 is definitely one of the best BMWs ever made

[@tylercouture216]

it is the best

[@PuerRidcully]

Some say it's the last good one.

[@Fony_turgeson]

2003 m5 was the best bmw other than 2004 330xi 2001 740il. 2000 m3

[@gorrington007]

I've got an E39 540 msport and an M5.. Best two cars ever..

[@basithph8958]

@@gorrington007 yo that's cool

[@theblackmambaplague]

Oj is the freaking man!!!!! True freaking gem!!!

[@b4804514]

Alex Always a pleasure to watch you go to your special place with these cars. This will educate lots of owners.

[@danielwatts9803]

My 01' 530i sport is sitting outside waiting for me to tinker with its MAF... I'll be back

[@nsrracing1]

409,000 miles?! 409,000 miles?! Great Scott?! Are we talking about the body or the engine? I really dont belive it

[@ddbb8802]

I had one with 4500000km

[@nsrracing1]

@@ddbb8802 maybe it might have been possible for engines pre 1996 but after that no way. BMW and their plastic minded engineering have made sure all engine never reach 100k with out problems. By the way what car do you have that made it up that high?

[@ddbb8802]

It was a e39 m5 99. I blow it at 47k in a traffic circel while drifting.

[@zizogaucho9035]

This man OJ is a jam to listen to, and thanx to you Alex for featuring him every time, im now subbed for he's channel, but your collabs (here in LSC channel are better).

[@kentpayen8848]

Wow great video...question on a 03 bmw x5 if my front differential took a crap on me. Now the suv won't move. Can I cut the driveshaft out. So I can drive the car into my garage

[@Rick2010100]

The first thing i would have done by such weak performance: air filter check, cleaning the needle in the air mass sensor with break cleaner, check the sparks, run the car with injection cleaner addtitive reset the ECU and teach them new.

[@pauljoe780]

You must have done this so many times. But next time, if you use brake cleaner, first make sure you look at the big words on the front of the can. Then you`ll know you`ve picked up the right can. Don`t ever use break cleaner. That`s terrible stuff.

[@Rick2010100]

@@pauljoe780 The small needle in the air flow sensor can only be cleaned with hard chemicals and break cleaner is perfect for this, you dont need much, just a short spay and after soaking a second. It´s just about get rid of the dirt film.

[@BlackLung911]

It's great to see old cars showing the new kids on the block they still have it :-)

[@Czechbound]

Alex is as stoked about his friend's power gain as I'm sure he'd be if it was his own machine. That's a very nice trait to see in someone.

[@bertsbug5757]

Brent from PFI it's also a good tuner

[@DanielWraps]

what is the name of the website you use for your online manuals with those awesome pictures you always show in many of your videos?

[@FluidMotorUnion]

For all of you who have questions about what Alpha N is and how we use it to tune check out our blog post! www.fluidmotorunion.com/what-the-hell-is-alpha-n-tuning/

[@MrBillrookard]

That's pretty awesome. You basically re-found about 75% more horsepower. That being said, that's one thing I both love and hate about the complicated electronics these days. You have to be an electrical engineer to diagnose and fix modern vehicles...

[@Bsaint]

Great video just wish they would tighten those rear straps, waaaaay too much movement and slack in the rear. It’s coming off of the rear roller

[@zimzimzimmer]

Loved seeing this I wonder what Gregg’s reaction on the road. Just shows like you said how important it is having a tune now and then. I’d say yours with mods 300, and his cars worth approx $20,000?

[@mireliom]

M5 owners best dream video ! Thanks for the info sure needed it .

[@propergarage4249]

mireliom sure is man!

[@icekk007]

I wonder what is the impact on emissions after the tune. Does the car still run on lambda feedback control? I fear that it does not.

[@davidderoxby2697]

This guy is so clever and experienced! But having that dyno is the key!

[@deplorabledave1048]

My dyno tuned E46 M3 makes 300 to 310 RWHP depending on temperature. I have seen naturally-aspirated versions of my S54 straight six make around 400 horsepower using special intakes and special tunes. It takes a lot of money just to gain that. Not sure how much. One guys tune came all the way from Dubai. The air boxes are all carbon fiber and cost a small fortune.

[@jackprick9797]

Makes me want ti drive to chicago to get OJ to tune my car. Fantastic!

[@LewisDijs]

Hahaha! “You’re gonna drive easy, right?” “NO!”

[@dangerousfreedom4965]

Why not try swap swapping the mass airflow meters from your car?

[@bmwguru6611]

Well it means that this m5 has a 420 or 430whp if on a jet dyno wich mean on crank it has around 500hp well done but i wonder if i could get help i own a bmw x5 4.8is tune by dim sport can i modifie the tune by deleting the air mass flow ? And how will the ecu reads the air fuel ratio?

[@mikemoyercell]

those airboxes sound good stock i can just imagine with cone filters although i feel the stock boxes are better for performance and flow well and colder!

[@karan3013]

I wish I could get my e39 m5 serviced by OJ! I'm legitimately thinking of driving my m5 to Chicago from LA. 😂

[@Robin190T]

Awesome video . Real car people doing real car work and making real car talk

[@deplorabledave1048]

One of the BEST BMW M series videos ever done!

[@bruces12]

That puppy just about launched itself off the dyno with the HP gains...to discover all that horsepower to the wheels!!

[@anaru5643]

One of the best vid's done thus far, just awesome. Would have nailed it if a real life drive with the owner was done for comparision.

[@wisama7091]

"I'm gonna go home today, and my family is gonna write a song about you, and we will sing it" lmao

[@rammphillips3002]

I teared up when I heard that... Wow, that was priceless!

[@rueliotube]

Maybe this is dated info, but, with this being a Chicago area car where large temp swings occur, isn’t Alpha-N going to cause running issues as the temp scale swings? I thought Alpha-N was really for predictable whether conditions (and altitude) and had to be adjusted for variances. Great for race cars because you are setting it for race day conditions. So, even if this is a three season car, you can see a lot of variance in the Midwest. I am just a couple hours from Chicago myself so I know what it can be like here.

[@007Broadcaster]

OJ is the MVP!

[@jdmcarboy64]

I’ve got a e39 540i m-sport 6speed at 183k miles. And it pulls as hard as day one!

[@thegiggity03]

Did the same to my e46. I felt a gain immediately. So is this saying it's ok to run a car without the maf sensor??

[@sstace69]

We soooo needed to see that guy drive it.

[@user-lt2ky6ho2r]

Can we disconnect also the airmass flow sensor to m42 b18 engine with bosch airmass flow to produce more power?

[@FluidMotorUnion]

The reason it produced more power is because the MAF was not working properly. So if your MAF is functioning as it should and you arent tuning the car to run without it then there wouldn't be any gains. Check out our blog post here to find out more info on mafless tuning and the alpha n tables www.fluidmotorunion.com/what-the-hell-is-alpha-n-tuning/

[@GamerTreasures]

Sweet Ride, Sweet Results, OJ is the Man!

[@red95gts]

What about intake air temp compensation? The S62 uses air temp input from one of the MAFs.

[@FluidMotorUnion]

In the part 2 video we explain that we removed the pins from the MAF portion but left the pins for the intake temp sensor. That way it still reads the intake temps.

[@Asserti]

@@FluidMotorUnion why don’t you just replace the maf’s with new ones?

[@darcybowyer5743]

Same sort of thing with the Land Rover Td5 in that the MAF will go bad but not throw a MIL, plug in a Nanacom Evolution or similar and it’ll throw a MAF value low error in the log but otherwise there’s no outward sign on the dash to indicate failure. Disconnecting the MAF will lead to a small increase in power but prevents the overboost function working correctly. The Nanocom at least will show you the air flow values and with 2 out of the 3 in the fleet showing zero it was time to replace a few MAF!

[@lostinsdf]

A great video. Should all cars be taken to a tuner such as this to see how they are performing? My 2005 E55 is in the Pacific Northwest so its not going to Fluid Motor Union. :-( How does anyone find a good tuner for these kinds of cars in their local area? Thanks Alex. Always fun watching these.

[@smileypwn]

How can he tell A/F ratio on that dyno screen? Would that not require some sort of wideband sensor sending data as well?

[@chris-oy9jn]

It's nice to take your car to someone who actually knows what there talking about

[@rayquinn6886]

Awesome Video as usual, there was only one thing you forgot! I would have liked to seen even a five second clip of him driving the car for the first time after the tune. I can speculate that he was smiling like the Cheshire Cat and laughing like the Mad Hatter! Great job again!

[@audiovideotech9777]

As a Pro Detailer, I know Jason at Chicago Auto Pro's where he works at. Also do I see a dual head rear laser jammers over the rear plate?

[@steakandchips9046]

Excellent vids mate keep it up !

[@jellieman1]

Hmm I need a mechanic like this guy 👍

[@MegaSuperMiracle]

I got curious and looked for price of mass airflow sensors. It's$100 a piece for oem Bosh part on Rock Auto. Not sure what you guys mean by "expensive". I'm sure tune was at least that much

[@DerGolf2000]

What about the White smoke during the hightower dyno runs?

[@GeFeldz]

It's running rich in the high rpm and high load conditions, for safety and maximum power. Running rich produces a bit of smoke from unburned fuel.

[@tylercouture216]

that dude didn't use his resources at all in the 3 years of ownership he didn't bother to look up one BMW dyno or watch a single M5 pull on KZbin blows my mind

[@GoldenCroc]

Yeah, not to be negative to the owner, but he could have had a 530i and never known the difference it seems. I am happy for him though.

[@GoldenCroc]

In his defense, butt-dynos are notoriously unreliable, pretty much the only way even for an experiance driver to feel if your car is 100% with no comparison vehicle at hand is to take it to a dyno or the dragstrip/time it 60-130 with a stopwatch,

[@gregnatonson6970]

I always knew the car wasn’t right. I’m not a mechanic though so I rely on them to tell me what the problem is. The car has been to three different guys I trust with my other cars. One of them was a BMW specialist recommended to me by other E39 owners. Nobody could do what OJ did so easily and it’s not that I was afraid to spend money on it. Basically it’s a combination of OJ being good at what he does plus the others not having the deep BMW experience he has. Let’s face it, diagnosis is a skill that not many have and if there isn’t a code to tell you what to do...

[@GoldenCroc]

@@gregnatonson6970 I apologize, It does say in the video you never felt the car was running as it should. Still, even if the other guys could not find the fault, they should have been able to spot something wrong with it, a timed 60-130mph run is easily done and would have taken twice as long as stock, when the normal variation is only in the single digit percentage. They would have known and performed this so they could at least tell you something is wrong even if they could not fix it, just a professional courtesy. Bottom line: You were a bit to trusting, it happens. Great that you finally got it fixed.

[@chrisvig123]

Very few people dyno their cars it’s expensive 😯

[@mtbridingog9083]

Had a 328i with a bad maf I would unplug it to reset it back to factory values and the car would break traction .. granted I did do lots of work to the car but in the beginning it was drifting with the open diff ..

[@BuildandTinker]

That’s awesome, please create a clone of OJ and ship him to England! what a legend.

[@racelogic27312]

The 991 GT3 RS without the wing looks 🔥

[@frankfilippone9679]

He does have a great way of explaining it

[@fastra3621]

Love to hear Greg's reactions to his 'new' car!

[@TreyKing63]

The O.J. Dyno song!!! All together now...

[@cobra454tim]

This is quite interesting every couple months I pull apart my MAF and throttlebody and clean it usually about every third oil change on my Subaru I have the flat six, but what is weird is the best thing to do is reset the ECM by disconnecting one of the leads to the battery resetting everything after doing the cleaning!

[@stanleylu3625]

@legitstreetcars would these adjustments effect the E46 M3 too? I had maf running rich issues and assuming they were made in the same year

[@FluidMotorUnion]

Its definitely possible! Try unplugging them and see if it runs any better.

[@theseven86]

Show us reaction video with his first ride after the dyno session! Please

[@friguy4444]

Great Video! I know you say this can be done with other cars. However I keep hearing that my E46 M3 will only do what it's gonna do unless bolt on mods are done (for the most part). I'd love to find out this is not so.

[@FluidMotorUnion]

Check out our blog post on alpha n and how it can be used for tuning! www.fluidmotorunion.com/what-the-hell-is-alpha-n-tuning/

[@friguy4444]

@@FluidMotorUnion Thanks for the link. I'll be having a look.

[@kevinyech5879]

To help diagnose that “sluggish” feeling without a CEL, you can check your volumetric efficiency. Several videos on KZbin on how to and what to expect.

[@MyGuyKirby]

OJ, OJ, OJ. One sharp dude.

[@randall2642]

Like the video. We needed to see the owner's reaction to driving the car with the new tune.!!

[@zeer6425]

Oj is a BMW GOD.

[@petercantremember253]

OJ is a God!!

[@shauna.antony]

Can something like this be done on a 2000 C5, I felt power loss on mine.. just doesnt feel peppy like it used to and no codes...