BMW 3-Series (E90 E92) Forum - General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio https://www.e90post.com/forums/ Chat about the BMW 3-series. en Mon, 20 Apr 2026 06:32:12 GMT vBulletin 60 https://www.e90post.com/forums/multisite-style/e90post/misc/rss.jpg BMW 3-Series (E90 E92) Forum - General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio https://www.e90post.com/forums/ Rear Lower Trailing Control Arm, is this a take off and put the new part on? 🤔 https://www.e90post.com/forums/showthread.php?t=2238115&goto=newpost Mon, 20 Apr 2026 01:26:04 GMT I have a 2008 BMW 328i Coupe 6 speed... I found the problem of my car swaying in the rear, my Rear Lower Trailing Control Arm driver side broke almost completely off some how!? I have not hit anything or potholes so how did that happen, I only have 77k miles!? Is this a simple take off... I have a 2008 BMW 328i Coupe 6 speed...

I found the problem of my car swaying in the rear, my Rear Lower Trailing Control Arm driver side broke almost completely off some how!?

I have not hit anything or potholes so how did that happen, I only have 77k miles!?

Is this a simple take off and put the new part on or is there any pressing, torquing, etc?

Also I just had it in aligned (4-wheel) two weeks ago and four brand new tires, will I have to get it aligned again once I put the part on?

Thank you guys, photo below of my broke baby! 😭

part # 6763477

Attachment 3945096
Attached Images
 
]]> General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio BimmerGuyHere https://www.e90post.com/forums/showthread.php?t=2238115 Harmon Kardon system upgrade amp https://www.e90post.com/forums/showthread.php?t=2238076&goto=newpost Sun, 19 Apr 2026 18:50:42 GMT Anyone here have the factory Harmon Kardon audio and upgraded the amp to something like the MatchUp MATCH UP 8BMW 8-CHANNEL DSP AMPLIFIER PLUG N PLAY, BMW HIFI SOUND OPTION 676 Thoughts or suggestions to upgrading the amp Anyone here have the factory Harmon Kardon audio and upgraded the amp to something like the MatchUp

MATCH UP 8BMW 8-CHANNEL DSP AMPLIFIER PLUG N PLAY, BMW HIFI SOUND OPTION 676

Thoughts or suggestions to upgrading the amp ]]> General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio Gecko123 https://www.e90post.com/forums/showthread.php?t=2238076 N54 LPFP stuck at 50–55 psi even with EKP bypass – need direction https://www.e90post.com/forums/showthread.php?t=2238059&goto=newpost Sun, 19 Apr 2026 16:46:03 GMT Hey guys, I’m trying to diagnose a low LPFP pressure issue on my 2007 E92 335i (N54) with a Walbro 450 LPFP upgrade (no port injection) and I’m running into a wall. Symptoms: LPFP pressure sits around 40–55 psi Under load it won’t reach the expected ~70+ psi Car is down on power / boost... Hey guys,

I’m trying to diagnose a low LPFP pressure issue on my 2007 E92 335i (N54) with a Walbro 450 LPFP upgrade (no port injection) and I’m running into a wall.

Symptoms:

LPFP pressure sits around 40–55 psi
Under load it won’t reach the expected ~70+ psi
Car is down on power / boost compared to normal

What I’ve already checked / done:

Found that the venturi (jet pump) hose inside the tank was not properly connected
Fixed that → pressure improved from ~30–40 psi to ~50–55 psi
But still not reaching normal levels
Checked voltage at the pump (via EKPM):
Around ~9.8–10V during priming
Bypassed EKPM (direct battery power to pump):
Pump gets ~12V
BUT pressure is still only 50–55 psi
So this seems to rule out EKPM / wiring as the main issue
HPFP seems fine (can hit ~2200 psi under load)

Current understanding:

Since direct power doesn’t increase pressure, it seems like a mechanical / flow issue rather than electrical
I already corrected one internal issue (venturi hose), but something is still limiting pressure

Next step I’m considering:

Checking/replacing the in-tank fuel filter / regulator portion of the assembly
Re-opening the bucket to verify:
Pump → top hat hose is fully sealed
No internal leaks or loose connections

Questions:

Has anyone seen an LPFP cap at ~50–55 psi caused by something internal like this?
Could this be:
A restriction in the in-tank filter/regulator?
A small internal leak still present?
Or a bad/incorrect Walbro install?
Anything else I should check before pulling the tank assembly again?

Appreciate any input — trying to avoid chasing the wrong thing again.

I have the walbro 450 lpfp

Here are the links to the logs one is with venturi unclipped and the other is with the venturi hose properly installed: https://datazap.me/u/halitofax/proje...07ju06hal4riik

Thanks 👍 ]]> General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio mattlal https://www.e90post.com/forums/showthread.php?t=2238059 <![CDATA[2008 BMW 328i Coupe 6-speed manual, what's the best fit to tighten body roll?🤔]]> https://www.e90post.com/forums/showthread.php?t=2238037&goto=newpost Sun, 19 Apr 2026 14:00:12 GMT I have a 2008 BMW 328i 6-speed manual Coupe,,

The car only has 77,000 miles, but I noticed a lot of body roll mostly when I'm going high speeds around curves.

What would be the best fit to tighten this up maybe some aftermarket rear sway bars? I would think this would be a little bit tighter being a Coupe, but I guess it's not because it's not the sport model and I don't have the sport seats!

Any suggestions on tightening up the suspension and body roll is greatly appreciated thank you🙂 ]]> General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio BimmerGuyHere https://www.e90post.com/forums/showthread.php?t=2238037 Fuel consumption error https://www.e90post.com/forums/showthread.php?t=2237866&goto=newpost Fri, 17 Apr 2026 21:12:50 GMT I’m trying to figure out the fuel consumption correction in the hidden menu. E90 325i N52B25. Before the trip, the tank showed: 10.7 (L) 20.8 (P) 31.5 (Total) After the trip: 2.1 (L) 22.7 (P) 24.8 (Total) Difference: 6.7 litres I’m trying to figure out the fuel consumption correction in the hidden menu.
E90 325i N52B25.

Before the trip, the tank showed:
10.7 (L) 20.8 (P) 31.5 (Total)

After the trip:
2.1 (L) 22.7 (P) 24.8 (Total)

Difference: 6.7 litres

Distance? 121.7 km 🙃

I’d maybe understand a result of 8–8.5. About 70% of the driving was on the motorway. 5.51 l/100 km is an unrealistic figure for a straight-six 2.5L.

It’s not even that I’m calculating it wrong — based on the distance and the tank readings, this is what comes out.

Does anyone know what’s going on?

EDIT: Yes, I've zeroed the odometer before starting the trip. ]]> General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio Bac https://www.e90post.com/forums/showthread.php?t=2237866 Fixing a free e90 https://www.e90post.com/forums/showthread.php?t=2237859&goto=newpost Fri, 17 Apr 2026 20:10:11 GMT I have a 2010 328i e90 automatic LHD that was given to me for free.
Doing some research on the VIN i can see it was a crash damaged, manual e90 from Africa.
I've been going through the problems with it so far with some of them being a fried FRM module, a lot of cut wires up at the front of the car on the headlight harness and misc pieces missing.
The car starts and the engine sounds healthy, but I've been met with transmission codes which put the car into a limp mode whenever you try to put it into gear. Codes associated with this being 581A, 581B, 581C, 581D and 5658. All speed sensor related.
I've already done a service on the transmission to rule that out as a possibility.

So with that being said. I recently went on a trip and forgot to disconnect the battery on the car. When I got back the battery was dead. I recharged it and went back into trying to diagnose it and realized none of the ECU's were showing up. The only thing that sort of communicated was the JBBF module. I connected with INPA and saw the JBBF had basically lost the vin that was coded to it, and everything else.
Weirdly enough, the car still starts, but shifting does nothing. Car doesnt respond to throttle. Which i understand is because the JBBF/JBE is in charge of waking up the other modules.
So what I'm wondering is if the JBBF is recoverable by any means. I've tried coding it through Winkfp and only being met with errors. I've tried multiple sp-datens and am somewhat familiar with the process of using bmw tools. I've updated the cas on my 2008 e91 recently to try to fix an ELV issue.

So is this a situation that can be fixed with coding, or do I need a new JBBF/JBE.

Thank you! :thumbsup: ]]> General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio rogerduv https://www.e90post.com/forums/showthread.php?t=2237859 Continuous turn signal when car is off https://www.e90post.com/forums/showthread.php?t=2237830&goto=newpost Fri, 17 Apr 2026 17:20:32 GMT I am glad to be part of the family. I have purchased my first BMW. It's a 2006 325i e90, n54. Got a great deal on the car as it needed some love and care. Immediately replaced the oil filler cap to stop a major oil leak and replaced plugs and coils with high performance parts and the car is super strong at 239,600 miles! Now I'm narrowing down the little things and I'm having a few problems with lighting. Mainly in the headlight area. Upon replacing all of the bulbs in the front I noticed that I have a continuous turn signal lamp even when the car is off and the socket is all charred so at this time I have the bulb removed. Also when I turn on the head lights my left head lamp has a delay upon lighting but after toggling the switch left to right a few times it illuminates and I'm getting a chime with a d shaped headlamp warning symbol on the dash along with a service symbol with the car on a lift. Not the circle lamp warning. Any input would be appreciated. Thanks fam ]]> General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio johngrineriv@gmail.com https://www.e90post.com/forums/showthread.php?t=2237830 N47 dpf backpressure sensor issue https://www.e90post.com/forums/showthread.php?t=2237811&goto=newpost Fri, 17 Apr 2026 14:36:15 GMT Hello! I have an issue and I don’t understand what happens. My dpf backpressure sensor (oem number13627805152) always show pressure 5-25hpa when engine off. I change few sensors (new Hella,two used oem, new oem) and always have same problem. On cold engine measures lower (5-9hpa) and when... Hello!
I have an issue and I don’t understand what happens.
My dpf backpressure sensor (oem number13627805152)
always show pressure 5-25hpa when engine off.
I change few sensors (new Hella,two used oem, new oem) and always have same problem. On cold engine measures lower (5-9hpa) and when engine is warm measures always higher (15-25hpa).
What I do wrong? Maybe problem is not in sensor? ]]> General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio brvk https://www.e90post.com/forums/showthread.php?t=2237811 Angel Eyes E90 LCI Xenon headlights https://www.e90post.com/forums/showthread.php?t=2237752&goto=newpost Thu, 16 Apr 2026 21:27:04 GMT Hello,
I am looking for white LED angel eyes to freshen up the look of my car, but I don't want to pay for LUX LEDs. Any alternatives or suggestions? H8 blub ]]> General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio E91 328i https://www.e90post.com/forums/showthread.php?t=2237752 Coolant Leak from Transmission Heat Exchanger fittings https://www.e90post.com/forums/showthread.php?t=2237703&goto=newpost Thu, 16 Apr 2026 15:54:02 GMT I discovered a minor coolant leak from the joint where one of the lines from the transmission oil heat exchanger attaches to the radiator. This is a plastic piece with an o-ring that slides into the radiator and is secured with a torx screw. I changed the o-ring last time I replaced the... I discovered a minor coolant leak from the joint where one of the lines from the transmission oil heat exchanger attaches to the radiator. This is a plastic piece with an o-ring that slides into the radiator and is secured with a torx screw.

I changed the o-ring last time I replaced the radiator two years ago with a genuine BMW part but it still never fully sealed. Just recently I had the cooling system drained and decided to replace this with a larger o-ring which worked. I even pressure tested the entire system afterward to confirm there were no leaks. But I guess when things are nice and hot it's not the same. I'm still smelling coolant from the same area and I suspect it's one of the quick connect fittings for the transmission oil heat exchanger.

I can't get a good look without removing the intercooler, but I do remember last time I had it out and was reinstalling the radiator fan, there were some drips of coolant on one of the connectors. When the radiator fan is removed this heat exchanger is left dangling with nothing to support it but the lines. Definitely not ideal for 20 year old o-rings. ]]> General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio lowrydr310 https://www.e90post.com/forums/showthread.php?t=2237703 318d 2011 E91, no communication with dsc after engine swap https://www.e90post.com/forums/showthread.php?t=2237702&goto=newpost Thu, 16 Apr 2026 15:48:40 GMT Hi guys anyone point me in the right direction, I've got No communication with dsc module after an engine rebuild on my 2011 lci e91 318d n47

The engine will crank but not start, I've checked the fuses behind the glovebox, all seems good, they don't seem to be the same ones as mentioned in a Google search but the ones that are there all seem fine (checked with a multimeter in place).

Thinking it was fuel pressure issue I fired up insta and it came back with no communication with dsc or pdm

Besides a break in the pt-canbus is there anything I can check before shelling out for a new dcs module?

Is there any wiring I could have caught or crushed when getting the engine in or out?

Is there a way of testing the DSC module before I swap it out? A second hand one is only £20 on eBay but it needs coding right?

I'm fed up of this car now pretty much everything has been replaced on it at some point, never had such an unreliable car. ]]> General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio TWOSOC https://www.e90post.com/forums/showthread.php?t=2237702 2006 bmw 325 tire pressure warning https://www.e90post.com/forums/showthread.php?t=2237672&goto=newpost Thu, 16 Apr 2026 07:34:53 GMT i'm getting the warning message? Does the 2006 BMW 325 even have tire pressure sensors in the tires? I checked with AI and it said this wasn't even done before 2007. I got they use an FTM system that measures pressure by speed rotation. I stopped by a mechanic who plugged his computer in to my car and it showed nothing. He did see the the tire pressure was a little high so he adjusted the tire pressure What should I do next? Any suggestions? ]]> General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio bmw_python https://www.e90post.com/forums/showthread.php?t=2237672 Airbag issues (E90 to F series steering wheel conversion) or https://www.e90post.com/forums/showthread.php?t=2237630&goto=newpost Wed, 15 Apr 2026 23:28:21 GMT Hi. I bought an F-style steering wheel off of Alibaba for my E91. It is equipped with a steering wheel heater as Well, as my car is. The buttons all work, and it looks great.. But theres a little issue. They sent me an airbag where the connectors do not match the one on my old wheel. So im... Hi. I bought an F-style steering wheel off of Alibaba for my E91. It is equipped with a steering wheel heater as Well, as my car is. The buttons all work, and it looks great.. But theres a little issue.

They sent me an airbag where the connectors do not match the one on my old wheel. So im currently stuck without a horn (cause i couldnt wait to install it anyways):thumsup:, and an airbag light of course!


Can this airbag still be fitted somehow? If so, how? Ive thought about if you could switch the connector, but my original connector has more wires going into it than this one does.


Below is an image of both airbags. My old one on top, and also the connector on the new airbag that doesnt fit.
Attachment 3942847

Here’s the airbag connector on my old wheel, Which has two connectors leading to it(which both plug into the airbag)
Attachment 3942848

Eye candy:
Attachment 3942850
Attached Images
   
]]> General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio Boil https://www.e90post.com/forums/showthread.php?t=2237630 320 i (n43b20) Misfire 1 and 4 https://www.e90post.com/forums/showthread.php?t=2237600&goto=newpost Wed, 15 Apr 2026 20:03:24 GMT Hello out there I have a e90 320i (n43b20) which have misfire on cylinder 1 and 4 according to motor lamp and obd codes: 29cd 29d0 29cc Plugging out the MAF sensor makes the misfire codes not appear I have tried switching out spark plugs (It was sooted like crazy)and ignition coils on... Hello out there
I have a e90 320i (n43b20) which have misfire on cylinder 1 and 4 according to motor lamp and obd

codes:
29cd 29d0 29cc

Plugging out the MAF sensor makes the misfire codes not appear
I have tried switching out spark plugs (It was sooted like crazy)and ignition coils on cylinder 1 to no avail.

When I bought the car the crankshaft position sensor was not fully inserted. (inserting it made that error go away)

The previous owner have changed:
spark plugs (i changed cylinder 1 and it was already bad)
ignition coils
fuel injection / Fuel nozzles (idk the right word) I do not know if he has coded them correctly
new chain
new crankshaft sensor ( the one which was not in correctly)
new battery

Can you guys point me in the right direction? Any help is appreicated ]]> General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio Magneg https://www.e90post.com/forums/showthread.php?t=2237600 transfer case fluid change - reset adaptation https://www.e90post.com/forums/showthread.php?t=2237590&goto=newpost Wed, 15 Apr 2026 18:54:02 GMT Hi Is it true you need to reset transfer case adaptation with a scanner once you change the transfer case fluid? How critical is this? Thanks Hi

Is it true you need to reset transfer case adaptation with a scanner once you change the transfer case fluid? How critical is this?


Thanks ]]> General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio Gecko123 https://www.e90post.com/forums/showthread.php?t=2237590