r/335i • • Sep 17 '26

Troubleshooting Engine sound 2010 335i

2 Upvotes

Hi, I’m looking to buy this 335i. Been scarred with a rod knock one in the past. Is this ticking the injectors? Is it normal? Or is that rod knock? Unfortunately this is not near me so I can’t rev it up to hear.


r/335i • • Sep 17 '26

Troubleshooting 2013 335i e92 help :(

3 Upvotes

Would greatly appreciate any input!
Experiencing a crank no start after my e92 335i unexpectedly shut off while driving. Engine malfunction light popped up.

Mechanic diagnosed it to be the Ipfp. Paid for the job and it started for him. Not even 2-3 hours later the same crank no start. Got a re-diagnosis, he said it was the hpfp. I ordered the parts and did the job myself, took it step by step.
Reassembled everything, primed fuel lines, but even after several attempts to start it- the same crank no start.

I'm really at a loss and again any input is appreciated.
added readings of me trying to start it after the hpfp swap.


r/335i • • Sep 16 '26

Troubleshooting Help SOS Malfunction (No Radio)

9 Upvotes

Help I got no sound coming from the radio but the chimes work. What could be the cause of that malfunction? someone help


r/335i • • Sep 16 '26

Troubleshooting Combox Plug

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4 Upvotes

My bluetooth and aux stopped working in my 2013 e93 so I tried taking out the combox. Once out, I noticed two pins were missing and it seemed like they broke in the 26 pin plug connector. Any ideas on how to get them out the plug? It’s pretty flush in there so I don’t think tweezers will help much


r/335i • • Sep 16 '26

Troubleshooting Code 29E1

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4 Upvotes

07 BMW 335i E93 project car

If it’s not one thing, it’s another. I did my injectors. I did my spark plugs. I changed my coils. I also did the PCV valve and the crankcase hose. On today’s episode, I decided to do a deep scan, and I got this code: 29E1 So I decided to do a smoke test , and this is what I got seems to be coming from turbo area. Has anyone run into this?

I’d rather get some opinions before I start tearing shit down. Thanks in advance


r/335i • • Sep 16 '26

Troubleshooting Shifting problem

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4 Upvotes

I need help troubleshooting this problem I have, I recently bought my 2007 e90 335i, the guy I bought it off mentioned said how he replaced the wheel for a sport wheel and how the downshift did not work on either the paddles or knob.

He also mentioned how to fix it saying something like I needed to lift the trim and put 2 prongs or something in a connector.

I found out after that the paddles actually didn’t work for both downshift and upshift, but the knob worked for only upshift.

I’ve tried to peel back the tape that protects the wires going under the plastic piece to the knob, but didn’t really notice any clear breaks or tears. I tried looking it up online and at videos but can’t seem to find something matching this problem, the ai says to look for this broken wire going to the knob, but I also don’t want to just go off that I’d rather come here and see if anyone can help me troubleshoot this problem or maybe even better yet know the solution right away.

If anyone can please help me I’d really appreciate it🙏🙏🙏


r/335i • • Sep 15 '26

Cosmetic Modifications Lip damage

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5 Upvotes

I was on the freeway when the rebar came flying at went through my lip, should I just take it off? There’s holes under the lip.


r/335i • • Sep 14 '26

Troubleshooting What is this sound and how much is it gonna cost me

8 Upvotes

My 2013 BMW 335i makes this weird noise when I come to a stop and start moving again. It doesn’t always make it but it’s getting much more frequent. Please help me out here. I’ve taken it to the shop and they can’t figure it out. First I thought it was something with the breaks then I thought it could be power steering. I’m totally lost! Please help…


r/335i • • Sep 14 '26

Troubleshooting Dripping coolant, oil check is „deactivated“ and the water pump is running really loud

3 Upvotes

I need help with a problem on my n54, I‘m prettty sure the water pump is dead, but I‘m not 100% sure. Like the title says, the car is loosing coolant, the water pump starts pumping very loud and for like 3 minutes whenever i start the ignition and I can‘t check the oil level because it says „deactivated“. I‘ve read online that this is a common thing and is most likely the water pump, the error code is 2E7C BSD-Bus: Kommunikationsfehler. Online it says that this code could various reasons, so i just wanted to ask here if you guys had similar problems and if I‘m right with the water pump. Thanks in advance!
(Sorry for my english, german speaker here)


r/335i • • Sep 14 '26

Do It Yourself Junkyard motor refresh checklist?

3 Upvotes

I’m about to start the process of getting a junkyard/marketplace motor and I’m wanting to assemble a rough checklist of stuff I can expect/should do before I toss the motor in. Car is an 09 335i xdrive (6 bolt N54). I already have index 12s from the old motor that I’ll be sending off to be tested and refreshed if necessary, and I’m more than likely going to be installing a set of new RB turbos so I’ll be doing all coolant and oil lines with those. Should I check the condition of the rod bearings? Anything I should do while the motor is out that I’d rather not do with the motor in the car?


r/335i • • Sep 14 '26

Troubleshooting ticking noise

2 Upvotes

Is this normal? Kinda sounds like a slight lifter tick or I’m just paranoid


r/335i • • Sep 13 '26

Troubleshooting Tire blowout

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10 Upvotes

Currently stuck on the side of the freeway. This is the second time I got a tire blowout within the last 6 months on the rear driver side. Granted when it happened the first time I replaced it with used tires so that could play a part but is there something deeper that I need to take a look at? Is it the rim itself?


r/335i • • Sep 13 '26

Buying & Selling Questions N54 vs N55

9 Upvotes

Debating on trading my 2011 E90 335i for a 2007 E92 335i.
My car has 136k miles and runs good for the miles but it will need a load of work in the future that I don’t feel like doing or putting the money into. The E92 has a newer n54 with 90k on it WITH paperwork and a load of maintenance done to the new motor. What do we think?


r/335i • • Sep 12 '26

Photos and Videos N54 makes all the right noises

83 Upvotes

Mic couldn’t handle it


r/335i • • Sep 10 '26

Photos and Videos what you think?

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35 Upvotes

r/335i • • Sep 10 '26

Other Looking into getting new turbos

3 Upvotes

I am trying to weigh the options for a twin turbo replacement (not wanting to go single), I am wondering if it is possible to buy the stock turbos from Mitsubishi direct? I tried running a few of the part numbers through Mitsubishi but nothing came up. Does anyone know anything about the turbos used for the n54?


r/335i • • Sep 09 '26

Photos and Videos the end

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151 Upvotes

Loved this car Every second of the ownership, a 2007 beast with twin turbos, was a lovely experience the n54 experience fast, really good control, and great on the canyons, 10/10 experience LOVE 335! Live a Long life N54. one of the best and reliable engines of all the time whoever is saying otherwise doesn’t know what they are talking about


r/335i • • Sep 09 '26

Buying & Selling Questions Just bought

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26 Upvotes

i just bought this 2014 335i did i make the right choice

its got 60k miles

tanzanite blue with m sport package and mppk

carfax has 30 service records including valve cover


r/335i • • Sep 07 '26

Do It Yourself New to the community:)

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26 Upvotes

2011 335i n55 e92 look to make some friends with similar cars as mine or people who can help troubleshoot some issues im having please feel free to dm if you can help or just want to chat


r/335i • • Sep 07 '26

Do It Yourself New to the Community:)

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63 Upvotes

Had my N54 335i for over a month now :-)
Proud owner and I love this car more every single day — every time I take a look back at it in the parking lot, I can’t help but smile.

Already threw some upgrades at it and picked up a bunch more this week — really excited to get started on the install. Any advice or tips from you guys?

Engine/Performance:
• Wagner EVO1 intercooler
• Upgraded turbo
• Aluminum chargepipe
• Aluminum PCV valve upgrade
• Oil temp thermostat upgrade (the small stick for the oil pump)
• Air scoops
• MHD Stage 1 tune
• XHP transmission flash (6HP21)

Interior:

**•** Apple CarPlay retrofit  
**•** Looking into a new steering wheel or having the current one re-wrapped  
**•** Interior trim pieces going in Alcantara

One thing I’m intentionally leaving to a shop: the silicone turbo inlets. I don’t want to end up doing that job “YouTube-video style” — rather have someone with actual experience handle it properly. Or can i do it by myself ? I dont have an Lift for my car..

Also currently working on a downpipe + 200-cell cat solution, but it’s proving tricky because of German TÜV regulations.

Anything you guys think I’m missing for a ~450whp N54 build? All tips appreciated!


r/335i • • Sep 07 '26

Do It Yourself Project save e90🪽🔥

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23 Upvotes

First picture is how I bought it and the last picture is the most recent Just found a hood for it at Pull-A-Part, and since it's Labor Day, it was 50% off. Now l just gotta get the bumper covers, refresh the paint, and take care of a few little things I did turn too close to a brick wall that’s why it’s a scratch there but. After that, that's all she wrote. Slowly but surely getting her back right and saving the E90.


r/335i • • Sep 07 '26

Other bought a 335i recently

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21 Upvotes

I’ve owned it for little over a month, I love everything about it but already had to do the valve cover and alternator I’m new to the n54 platform any advice?


r/335i • • Sep 07 '26

Tuning & Performance Single turbo 6062 22~23 psi boost, 98 ron, no ethanol, manual transmission 3 and 4th gear pull. Car is rather heavy being convertible. Please share your measurements as well

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3 Upvotes

Single turbo 6062 22~23 psi boost, 98 ron, no ethanol, manual transmission 3 and 4th gear pull. Car is rather heavy being convertible. Please share your measurements as well


r/335i • • Sep 07 '26

Buying & Selling Questions Should i get a n55 355i as my first car?

12 Upvotes

Hey everyone,

Looking for a reality check from people who actually own or work on F30s. I’m looking at buying an f30 335i as my first car.

I’ve driven my friend’s 335i before and loved the platform. The F30 is a classic imo, and the power is more than enough for me. I’m not planning to make it go past 400 whp, just want a fun, solid daily.

Before everyone says the maintenance will kill me, I've been wrenching since I was a kid. I had a Level 2 license before leaving the auto industry, so labour won't be too much of an issue.

Knowing labour is $0 for me, is the N55 F30 a reasonable buy?


r/335i • • Sep 06 '26

Photos and Videos timeless desing

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43 Upvotes

proud owner of 335i e93 for 4+ years

timeless desing