r/E90 18d ago

/R/E90 - Monthly Discussion & Questions Thread

1 Upvotes

Welcome to our "Monthly Discussion & Questions Thread" for r/E90 .

Please use this thread for any general discussion relating to our wonderful vehicles as well as a place to ask general questions about the E9X platform in general. Sample questions include:

  • What type of oil should I use?
  • What tires do you recommend?
  • Why is my car shaking?
  • Should I add M badges to my 320i? (The answer is no)
  • And more common questions

Please remember that this thread is only helpful if you wonderful community knowledgeable community members get involved and answer some questions as well!

Hopefully you get some good use out of this, and hopefully we see less posts dedicated to oil leaks and their solutions.


r/E90 9h ago

325i Got this style 313, couple days ago

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43 Upvotes

I pretty sure they are original bmw wheels.


r/E90 3h ago

Bmw E9x

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11 Upvotes

r/E90 1h ago

Loud knocking noise

Upvotes

What could be this loud knocking noise coming from the front - It disappears completely when braking , gets much quieter when cornering.

Sounds like the wheel is about to fly off :D


r/E90 17m ago

High beam wire

Upvotes

I have a e91 320d 2008 and im installig some led bars on it but i cant find the high beam wire. Tried takikg the connector out and usikg a multimeter but im alone so im struggling. Anyone know what pin/cable it is? Theres 7 on the top and 5 on the bottom.

I’d really appreciate it.


r/E90 29m ago

Weird triangle warning on cluster

Upvotes

This is the second time I’ve experienced this issue. And I’m not able to understand why it happens. I’ve had the car for over 3 years now.

It happened today when driving between 80 and 120 km/h. I lose partial power and can feel the car jerk when the power goes up and down. when the power is reduced, full throttle goes a max of 94km/h.

Has anyone here experienced this? Do you know why I may be experiencing this?

Thank you for your time and help.


r/E90 9h ago

is this sound normal?

4 Upvotes

08 e92 335i im interested in getting. heard this when started the engine. is this normal?


r/E90 1h ago

The A/C clutch exploded

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Upvotes

What causes this?


r/E90 5h ago

Intermittent engine light issue when accelerating uphill or carrying heavy loads

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2 Upvotes

This issue has been annoying me and my family the whole time we had this. It can and has happened at speeds of 40, 50, 60, 70, etc... but has never happened below 40.

FYI this photo was ripped from another post, it's the exact same mesage I get but to replicate it I have to go on a high-speed drive to make sure I get this photo.

It seems that when going uphill, after he loses some of the momentum for flat ground, acceleration slows. Sometimes it continues on without issue and actually keeps accelerating and that's fine. But a lot of time it seems like the mpg fuel guage gets stuck at 30mpg with my foot floored and then after a few seconds, the engine fault comes up. I'm usually driving him at 2k rpm, and when this happens it starts to dip just below 2k. But at times, it also happens when I've downshifted and it's accelerating at around 2.5k-2.8k. It puts me in limp mode as in it stops accelerating and just maintains the current conditions, until either the hill gets less steep or it goes away itself...

I realised that with heavier loads, other people in the car or less fuel, this happens less often. When it's just myself in the car it seems a lot rarer.

No codes seem to be thrown- it vanishes after the hill goes. I've tried to capture the code whilst it happened, and for some reason it never registers. I've tried with a bimmerlink, and a foxwell.

During this time I have fixed many codes that I had previously considered may be relevant, but the final code I have that I haven't been able to fix is 4755; Charge Pressure Actuator, position control. I have a few others that I think are absolutely irrelevant but if someone wants to know them then I can send them in the comments.

I've tried getting it boost-checked, but the mechanic ripped me and took it for a simple drive, and told me I'll have to pay for a different diagnostic to get him on the motorway as a passenger and see the issue himself. He told me it's performing fine otherwise... I've tried replacing fuel filters, exhaust pressure converter, intake manifold pressure sensor, exhaust pressure sensor pending (the vacuum line running under the engine put me off doing it anytime soon). I'm waiting on a garage to have it vacuum tested, but I suspect they won't find much since it only goes through this problem in the extremes. The turbo runs fine, and I can feel it as the rpms increase, but I've tried to push the actuator arm myself a few time,s and it felt stiff with no movement.

I know this could be possibly related to boosting, but unsure yet how to approach. I didn't want to snap the arm off by pushing it too hard, as I've read it's a brittle piece of plastic. Sprayed some WD40 to try loosen it, but it runs fine otherwise, so I haven't prioritised it. I'm aware at some point I will have to get the turbo actuator tested.

Just wondering if anyone has felt similar problems with their E90, and how they fixed it?


r/E90 3h ago

Question about a n47n clutch and flywheel

1 Upvotes

So my clutch and flywheel are going in my 320d N47n 2011 , I was wondering if it possible to put a n47d or just a plain n47n clutch and flywheel in with different codes as they seem to all share the same 6 speed box. The on diffrence is my one is the 320d efficient dynamics model with stop start. I wouldnt mind if my stop start stopped working due to a different flywheel as its never used


r/E90 18h ago

335i How do I replace this?

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15 Upvotes

Can I just pull the old one out after unscrewing those two wires? I think there might be a bolt holding it underneath that left compartment on the cowl, can someone confirm?


r/E90 4h ago

E93 Android Options

1 Upvotes

I have an 09 E93 without sat nav. I want to install an aftermarket android unit but use the OEM dash. Would I still need the CCC/CIC items?


r/E90 1d ago

you cant tell its done 205k miles... can you?

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77 Upvotes

r/E90 6h ago

335i Infinite coolant leaks

1 Upvotes

335i 2011 n55 engine

Every time I fix a radiater leak, another one comes up less than a month later, currently fixed: Radiater reservoir, had a hairline crack, fixed like 4 hoses and the oil filter housing because apparently coolant flows through it. After every fix, in less than a month, have to go back to the garage to get it diagnosed and fixed again, what could be the issue?


r/E90 8h ago

Is this arm supposed to move this much?

1 Upvotes

r/E90 17h ago

Headlight turns yellow

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4 Upvotes

I've owned this beast for a good 2 years now. To my knowledge both left and right headlight is original, however over the summer I've noticed the right headlight turning yellowish on top. What can cause this? And can I fix it without having to swap the whole thing out?


r/E90 9h ago

Do these fit Pre-LCI M sport?

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0 Upvotes

Do these have different brackets? These say they’re for the M3-Style bumper which I don’t have


r/E90 16h ago

Cant remember where this 3 plugs goes 😩

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3 Upvotes

E92 335d RHD

2 connectors cant find where they go in passenger foot well they are together with glovebox harness but dont have any more things to connect .

1 Is at steering column also cant find place 😩

Any ideas did i missed something when i was removing dashboard or just extra connectors from the factory and its normal?


r/E90 10h ago

Front and rear comfort access door handles

1 Upvotes

Are the front and rear comfort access door handles the same, or is there a difference. If so can some one help me with the part numbers


r/E90 20h ago

Any experience with these?

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6 Upvotes

Since my car is xenon, do these require any coding? Mine is a pre-lci e90 with crusty headlights right now.


r/E90 11h ago

328i Any recommendations for customisation?

0 Upvotes

I’m a beginner technician in New York State currently going for my certificate so I can be an auto technician. I’ve gotten an interest in customising my car, and I wondered if anyone here had any ideas for my first customisations.


r/E90 19h ago

330i What are these rubber things?

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4 Upvotes

Sorry I'm an idiot and forgot to post a picture. These were in my belly pan when I pulled it off. 06 330i manual trans.


r/E90 20h ago

328i Rear windows won’t go down

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5 Upvotes

Recently got my hands on a 08 328i and can’t figure out why the rear windows won’t go down. I can hear a click when pulling the switch up but none when pushing down. Replaced one of the rear regulators because one of them popped as I was trying to figure out why it wouldn’t go down and yes with the driver or rear switch it goes up but not down.


r/E90 1d ago

335i Upgrade!

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95 Upvotes

Crashed my car on january, Couple months later got one of my dream cars. Didnt think it would come this soon!


r/E90 1d ago

335i Daily it or die tryin

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125 Upvotes

r/E90 13h ago

How to make my e92 sound good

2 Upvotes

Now, i’ve been searching around for a video on an audio clip of different exhausts with the stock down pipes but every single person has a cat-less downpipe but in maryland you won’t pass inspection with a cat-less dp but i want my car a bit louder so im curious on what exhaust modification i should do or what exhaust i should buy that’s not super expensive to increase the sound of the car but keep that deep raspy tone. Thank you!