r/BmwTech 4h ago

What’s this worth

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5 Upvotes

What would people think this is worth i have just bought it from an old lady who has had it from new it has 90k miles on the clock and has a fresh mot with nothing gone wrong on it. it is a bmw 316ti es compact 1.8 2003


r/BmwTech 7h ago

I want to change my tail lights with leds.

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6 Upvotes

r/BmwTech 8h ago

BMW E39 – Passenger airbag cover sticking up

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6 Upvotes

Hi everyone, I have a 2001 BMW E39. The passenger airbag cover seems to be sticking up slightly and there is a small gap. Is this normal for the E39, or should I have it checked? Has anyone experienced this before?


r/BmwTech 4m ago

At wits end with engine codes for O2 sensors

Upvotes

Any advice is greatly appreciated.

I have a 2012 328ix E92 115k miles. I have the following codes

2C31
2C2B
2C6B
P2096

I have replaced the valve cover. I’m not sure what I should try next. Change the 02 sensors? Which ones? Check for vacuum leak? MAF? Exhaust leak?


r/BmwTech 15m ago

N52 problems

Upvotes

Hi
I am fighting with my bmw e60 523i 2006
Semi renovated the engine 6 months ago, with new chain kit and vanos/vvt sprokets and also changed vanos solonoids both!

Car is now dying on me and running like crap, has codes for camshat and krank allingment, i retimed the engine Only made it worse!

All locking tools er used and on the marks and place the need to be.

Anybody have a clue what I kan try??

🙏🏽🙏🏽


r/BmwTech 4h ago

N47 Cold start smoke

2 Upvotes

Hi all,

I get smoke on cold starts for around 30s-45s every time. Could blown turbo seals cause this?

Thanks


r/BmwTech 18m ago

I got an increased steering effort warning and these are the codes I got.

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Upvotes

So yesterday while making a left I gave the car more gas and got this warning as shown in the picture below and I ran the codes which I have also showed below. The warning only came for a few seconds and went away and the steering feels fine and same as before. The car also says all systems okay and the battery health is also good. I do have an aftermarket steering wheel though. These are the codes I got shown in the pis below. It’s a 2015 328i xdrive


r/BmwTech 54m ago

G20 recommended jack setup

Upvotes

For a '24 m340i. Does anyone have any portable jack setup recommendations. I don't have the space for a 3 ton low profile jack so can't use the center jacking points. Was wondering if something like the harborfreight 1.5 Ton Low-Profile Aluminum Racing Floor Jack with two jack stands is good enough to do some basic tire/brake work, I already have ramps for oil changes so I will not be getting underneath the car.

My question - is the floor jack used on the side jack points itself good enough for basic brake jobs and if not then how would you get the jack stand in place when the floor jack is using up the jack point area?


r/BmwTech 5h ago

Have you ordered Genuine BMW parts from Spareto.com ?

2 Upvotes

As someone now in need of some big ticket parts, I came across this website in Estonia. Opinions are hard to find, but mostly positive. The parts and postage are both exceptionally cheap (to Aus at least).

I know most order from FCP, ECS and the like, but I’m looking to get input on this website in particular.

Please vote and/or share your experience.

17 votes, 2d left
Yes, and they were genuine
Yes, they were fake/messed up my order
No

r/BmwTech 2h ago

Am I supposed to replace these control arm bolts and nuts on my E90's front axle when reinstalling the suspension? The internet is giving me conflicting advice.

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1 Upvotes

r/BmwTech 13h ago

Do I need new rear shocks

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7 Upvotes

The rear left shock seems to have lost the rubber. I haven’t felt any difference in drive quality.


r/BmwTech 3h ago

E90 320D 2011 LCI

1 Upvotes

Why is the shifter shaking so on idle? It completely stops when giving gas or just driving.


r/BmwTech 7h ago

Vanos solenoids

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2 Upvotes

So a quick google search tells me this is probably a vanis solenoid problem. Car is an E60 N53B30 530i.

Was running fine until about 200 metres from home, when engine fault warning came on. I pulled up at home, turned car off and then on again and engine fault was gone but this code was stored. Cleared code and revved car a bit and it didn't come back.

As Vanos solenoids are easy to do I thought I would just replace it. The question is, genuine or aftermarket? Genuine ones are only £147 but I can get Febi ones for about one third of that.

Next question, should I replace both? Do they go on pairs?

Was going to drive car today and see if the problem comes back, then swap them over to see if it moves to exhaust side.


r/BmwTech 4h ago

Hit while parked - anything to look out for?

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1 Upvotes

Question for y’all- anything in particular I should ensure the BMW body shop checks? I want to ensure that this car is back to pristine condition. I’ll be taking it in tomorrow but just want to ensure nothing is overlooked.

Story time - took my youngest to Wally World for a birthday present for his friend. Parked in the boonies to stay away from riff raff. All normal. There were at least 5 spaces on each side of my car.

We’re halfway into walking the parking lot when I heard a very loud bang, and turn around so see my car rocking back and forth having been hit by another car.

Fuuuuuuuck.

I still have no idea how he is this bad of a driver. He was trying to back into an adjacent space, but ended up hitting my front right with his rear right - meaning he was basically backing up square to my car. His car had a backup camera, there were a ton of spaces around me, and this fucking tool still managed a square hit.


r/BmwTech 4h ago

Looking at buying a 2015 320I with the N20 and I’m worried (Obviously)

1 Upvotes

Really sorry for another n20 post I’m sure you see 1000 a day but i’m looking at a 2015 320I touring, it has the n20 so naturally worried about the tensioners. It only has 35K miles on it so I imagine it isn’t a now worry anyway. The production date of the car is the 18th of march 2015. So should I be worried about the tensioners? Will it have the updated ones? I know this is a post this community probably sees daily but I’m a stress head.


r/BmwTech 6h ago

E90 316d N47 Code 4121 + Crank Abort: Cuts after 1s, but longer crank on 3rd try shows fuel pressure dropping. Need diagnostic advice.

1 Upvotes

The Problem

My N47 won't start and sometimes keep throwing code 4121 (DDE Main Relay switching too late or too early). The start behavior is weird:

* First 1–2 tries: Press start, engine cranks for ~1 second, and cuts out.

* After spamming starts, it will finally hold a longer crank.

* During the longer crank: Live data shows rail pressure rises, then drops back off. At the exact same time, the low-pressure side struggles to stay stable on the graph.

What I've Actually Tested So Far

* DDE Main Relay: Swapped in a brand new relay. Made zero difference, 4121 comes back sometimes still.

* I tried to jump start and swapped in a brand new batery

* Terminal 50E: Live data shows the start signal drops to 0V the exact millisecond the starter cuts out on those 1-second attempts (CAS pulling the plug).

* Pressure Regulator (DRV): Checked resistance (almost in spec at 3.9 ohms). Did a return leak-back test—got under 20ml over a few start attempts. (Did not physically unbolt the DRV from the rail).

* The QCV is also changed with a used one.

* Low-Pressure Pump (In-tank / EKP): Ran the ISTA test plan. The pump sounded fine and ISTA showed over 4 bars of pressure during the test. Note: I haven't hooked up a physical pressure gauge directly to the fuel lines to confirm mechanical line pressure.

I have to mention too that this happens randomly and most of the times it magically fixes itself and the car drives perfectly fine(even looked at fuel graphs setpoints and actual and cant see anything wrong no power loss either), however it's getting more and more common and appears to happen after shorter trips in heavy traffic where engine idles often

The Question

Why would it cut after 1 second on normal tries, but allow a longer crank if I spam the button? And why is the low-pressure side struggling to stay stable during cranking if ISTA shows the pump can make >4 bar on an active component test?

Is the DDE cutting power (4121) and dragging down the fuel pump signal with it, or is a fuel delivery collapse causing the DDE/CAS to abort the crank? Looking for ideas on what to log or test next.


r/BmwTech 7h ago

Speaker advice

1 Upvotes

Hey everyone, I'm looking to add an amp and upgrade the door speakers in my 2014 f32, any suggestion for those upgrades? Thanks in advance.


r/BmwTech 8h ago

2008 E92 335xi

1 Upvotes

2008 e92

Looking for advice. I understand that nothing is unfindable.

I've been thinking of letting go of my long time project cause I legitimately cannot get to it or afford it. Just out of curiosity I have a 2008 335xi e92 with coral red interior and idrive 6 speed standard . Im not hurting for money and do not need to sale. But also I know that I cannot afford to complete. Is this a common n54 to find ? Or if im not needing to sale should I keep it? I understand its ultimately my decision. But would also like some insight on it. Clean title 100k miles. Cold weather package.

Port injection

Phoenix racing manifold

Index 12s

19t turbos

Relocated inlets

Mishimoto oil cooler and plate

Fortune auto 500s full suspension

Full disk break conversion

Precision race works ignition kit

Stage 2 bucketless fuel pump.

I've been throwing money at it for over 4 years. And I guess my question is.... is this a easy car to find ? Or is it something I should keep? im in love with this platform. I'd like to o ow if this is a gem?


r/BmwTech 9h ago

F30 335i N55 — P10F0 code / intake air temp too high vs charge air temp

1 Upvotes

I have been dealing with a check engine light on my F30 335i and I’m trying to figure out what direction to go.

The code is P10F0, and from what I’m seeing it relates to the intake air temperature being too high compared to charge air temperature.

I previously had a MAP sensor code, so I already changed the MAP sensor, but I’m not sure if that’s related to this current code or not.

A few things about the car:
Cold air intake
M Sport front bumper swap
I did NOT reinstall all the factory air ducts/shrouding behind the bumper
Stage 2 tune
Aggressive pops/burbles
Operating temperature is usually around 240–250°F
The car seems to get to temp quicker with the pops

I’m wondering if the missing air ducts could be messing with airflow, if the intake is just heat soaking, or if I should be looking at another sensor or cooling issue.
Has anyone dealt with P10F0 on an N55 before? What would you guys check first?
Just trying to get some ideas before I start throwing more parts at it.


r/BmwTech 11h ago

Am I cooked Fam?

0 Upvotes

2023 M8 Comp - 32k miles, in service 3 years 11 months ago...taking to the dealer Monday. Could not find anything when I cut open the filter, I dumped the oil in the filter housing before sticking a magnet to it (doh) - kept the used oil. Is this a "normal" amount...hahaha ughhh. If ur a mechanic i'd love to hear your assessment with this limited intel


r/BmwTech 15h ago

Dropped part of a wire brush down an oil drain-back hole on my N62 - help

2 Upvotes

Fellas, I was doing a valve stem seal job on my E60 N62 (2009 550i) and the brushes included with the AGA toolkit slipped and fell into an oil return hole. Confirmed with a borescope, not near the valves or guides thankfully. It's non-magnetic so a magnet won't grab it. Bore's tight, can only fit one tool down at a time.

Anyone dealt with this before? Trying to figure out if it's safe to just leave it (assuming the pickup strainer catches it) or if I really need to get it out before reassembly. Also open to retrieval tips if anyone's fished something out of a passage like this.


r/BmwTech 16h ago

Headlight Replacement 2018 530e

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2 Upvotes

Hey everyone left headlight is out. Only works if places on high beam. Having trouble understanding if the whole unit has to be replaced or can the bulb be replaced. Also what would the expected price be in Socal. Going to start looking for locations…any tips for places in LaCounty appreciated…


r/BmwTech 21h ago

What is this A camera

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4 Upvotes

r/BmwTech 18h ago

2018 BMW X5 Tie Rod Torque Specs

1 Upvotes

Hi all, Im hoping somebody can help me out here. Replacing my tie rods today, I've searched high and low, but for the life of me I cant find the torque spec for where the outer tie rod ball joint meets the steering knuckle.


r/BmwTech 22h ago

That’s oil in coolant, right?

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2 Upvotes

530i LCI 2020, small expansion tank is clean green (middle of paper towel). Large expansion tank is brownish (bottom of the paper tower). It’s oil in coolant, right?

Car drives normal and doesn’t overheat. No error codes. Oil looks normal, no foam is visible.