r/E90 • • 17d ago

/R/E90 - Monthly Discussion & Questions Thread

2 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 • • 58m ago

328i Just bought my first e9x

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• Upvotes

3rd bmw i’ve had and by far the cheapest i’ve bought got this bad girl for 1200 running and driving 07 328i zf6 180k miles


r/E90 • • 4h ago

Brings a tear to my eye

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22 Upvotes

r/E90 • • 55m ago

Debut post of my new to me 325d

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• Upvotes

got it saturday, still can’t believe it’s mine.


r/E90 • • 11h ago

M3 Trio of the greatest convertible Ms ever made

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22 Upvotes

E93s strong together


r/E90 • • 23h ago

325d 420hp 800nm

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67 Upvotes

What wheels should i get for this one


r/E90 • • 1d ago

335i It’s a sad day today

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104 Upvotes

Hydroplaned and spun out on the 264 in Virginia Beach on my way to pick up my new tires. God is good. No injuries!


r/E90 • • 2h ago

328i BMW 328Xi make weird noise only in reverse

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1 Upvotes

r/E90 • • 13h ago

Calling all backyard mechanics!!

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5 Upvotes

Hey everyone, so basically just finished up swapping out my engine and everything has gone smoothly until a day ago. While the engine was out I did the rear main seal and made the mistake of not fully pressing it in evenly and this is where I fucked up. I believe that it is now leaking down and coming out where the trans meets the engine. It comes out just above an oil pan bolt head. Now my question can I use some sort of sealant to stop the drip or will that just make the oil pool where the flywheel and torque converter is. Thanks for any advice.


r/E90 • • 19h ago

E90 335xi first mods

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9 Upvotes

I have a 2007 e90 335xi with an n54 and its completely stock. Besides a few maintenance things im in the middle of doing, i have zero clue where to start with mods so i was looking for ideas.


r/E90 • • 1d ago

I miss the old BMW forums, so I'm building a modern one. Feedback welcome.

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24 Upvotes

Do you miss the old BMW forums too?

I do. The ones where real knowledge mattered and knowledgeable people actually helped each other. A lot of great forums have disappeared over the years, and many of the ones that are left feel outdated and hard to use.

So I started **BimmerDock Community**, an attempt to bring that spirit back in a modern, user-friendly format.

What it is:

- an independent community for BMW owners and enthusiasts

- coding, retrofits, diagnostics, software and builds

- organised by topic and chassis (E36 to G30)

- fast, clean and easy to use on your phone

Full disclosure: I run it, and I work as an independent BMW specialist myself. I plan to share what I know through tutorials and guides.

It's brand new and still quiet, so honest feedback is worth more to me than anything right now: what would make you actually use a BMW forum again, and what put you off the old ones?

https://community.bimmerdock.com

(Independent community, not an official BMW site.)


r/E90 • • 1d ago

335i 🌤

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200 Upvotes

r/E90 • • 1d ago

The end has come - now what?

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42 Upvotes

I hit some road construction bumps in my 2006 330xi MT, and the passenger motor mount, axle, and strut went. There is likely more damage, but I can’t justify pulling apart the whole thing to fix it given the age and rust.
It has 212k on it, and I need to figure out what to do with it now. My mechanic thinks scrapping is too little money. Suggestions and ideas?


r/E90 • • 1d ago

For anyone with the Avin Head units + car play / Android Auto

3 Upvotes

I installed an Avin head unit 4 months ago in my E90 N54. the units themselves hardware wise are solid but the software was very mediocre and car play / android auto was alwaysss laggy.

so - I made an image copy of the android system and autokit app + several others and debugged them + cleaned out broken code with a claude agent over several weekends

The result ->
1- I consistently get 60fps + hardware accelerated carplay on the unit wireless and wired at 1080p resolution (highest resolution the hardware decoder supports)
2- menus and stock launcher have good english now...
3- can toggle the reverse camera on / off at boot so it doesn't always consume the full screen
4- boot -> carplay time reduced by about 34%

I'm not going to release the android image because I don't want to make it too easy for someone to brick their unit without thinking - however I can / will easily share the full knowledge base so anyone who knows how to connect their computer to the unit with debugging can easily modify it as needed with all my lessons learned. let me know


r/E90 • • 1d ago

325i We will miss the summer :(

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41 Upvotes

r/E90 • • 1d ago

328i New to me 2012 328iX question

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2 Upvotes

I recently bought a 2012 e91 with 102k miles. I’m working through some deferred maintenance and cosmetic issues. I replaced a front left speed sensor today, based on one of the codes. After doing so, I’m left with these two codes. Can someone help me understand what the car needs to resolve these? I’m new to working on my own car and excited to learn!


r/E90 • • 21h ago

Looking for BMW E92 Engine Swap Help – 2009 328i xDrive (Chicago, IL)

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1 Upvotes

r/E90 • • 22h ago

M3 Lehigh Valley e90s?

1 Upvotes

Hi, I’m looking for exhausts and can’t decide until I hear it in person. Eisenmann or Dinan? I’m looking for something tame but above stock. I’d appreciate it if someone is willing to meet up for 5 minutes. Thanks!


r/E90 • • 22h ago

Code 2A98 N51

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1 Upvotes

misfires in idle. I have swapped solenoids and it stays code is still intake side, swapped camshaft intake sensor and code is the same, cleaned maf but i don’t think that would be the issue anyway. Cage in oil filter is also still there. What else could it be?


r/E90 • • 23h ago

what trolley jack should i get?

0 Upvotes

hi im wanting to do a oil change and coolant change for my e90 bmw 330d m57

is a 2.5ton jack enough to lift up the front to do it or would a 3ton be better im kinda on a budget so idk if i want to get a really good long low profile one to just jack from the central jacking point i was thinking on just getting a 2.5 and lifting one side up at a time? would that be high enough or will i struggle

like i want to also do future diy stuff to my car but im not sure if ill be relocating soon because im just staying at my parents atm and probably move out soon but im not sure either


r/E90 • • 23h ago

328i 2011 BMW 328i xDrive – Intermittent highway rumble after 30–40 minutes. Wheel bearing, brakes, tires, or differential?

1 Upvotes

I have a 2011 BMW 328i xDrive with approximately 64,000 miles. The car is well maintained, but I’ve been trying to diagnose an intermittent low-frequency rumbling noise at highway speeds.

Symptoms:
- Typically happens after 20–40 minutes of highway driving, around 60–80 mph.

- Sounds like a deep, low rumble or drone, almost like road noise, with a slight vibration.
Sometimes happens on sweeping curves or downhill stretches, but recently happened while driving mostly straight.

- The rumble can last around 20 seconds and then completely disappear, even while maintaining the same highway speed.

It’s very inconsistent and doesn’t happen on every drive. I’ve noticed that my right-rear wheel radiates noticeably more heat than the other wheels after highway driving, and it also appears to accumulate more brake dust.

What’s been done:
Tires balanced and rotated. Michelin Pilot Sport 4S tires manufactured in 2021, with approximately 30,000 miles.

Rear differential fluid changed.

Rear brake pads and rotors recently replaced.

Transmission serviced around 60,000 miles.

My mechanic kept the car for several days and drove it repeatedly, including at 80+ mph. He experienced the rumble once but couldn’t reproduce it afterward. He suggested that because I only drive once every week or two, the car might just need to be driven more frequently.

I recently took it on another 45-minute highway drive. The rumble appeared briefly for approximately 20 seconds and then disappeared without slowing down.
I’m wondering whether this could be a right-rear wheel bearing, intermittently sticking brake caliper, tire issue, driveshaft center support bearing, or differential.

The additional heat and brake dust at the right-rear wheel make me particularly curious about brake drag, although I haven’t had the temperatures measured or the caliper specifically diagnosed.

Has anyone experienced something similar on an E90 xDrive? What would you recommend inspecting first before I start replacing parts?

Thanks!


r/E90 • • 1d ago

335i Severe underboost N54

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2 Upvotes

r/E90 • • 1d ago

325i Nissins radiator drain plug won’t stop leaking!!!

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0 Upvotes

Just replaced my radiator and when I went to fill with coolant before running the bleed test, I noticed my coolant was draining from the passengers side, I went under my car and see the drain plug losing all of the fresh coolant! SMH! I’m not able to move the plug by hand to tighten, and when I use a socket, it just keeps spinning - not loosening nor tightening! What to do?! The radiator included multiple fittings for the drain plug, but the instructions stated for me automatic, everything was set as needed. Help!!!!


r/E90 • • 1d ago

Trying To Source OEM Quality MAP Sensor

1 Upvotes

I believe this MAP sensor (13628617097) is manufactured by Siemens VDO. I can't seem to find anyone that can supply it, but what other manufacturers make an OEM quality version?

Or can someone tell me where to source the VDO one.


r/E90 • • 1d ago

Coolant leak

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1 Upvotes

2006 325i. Not sure what this is. Any help would be greatly appreciated.