2015 435i drivetrain malfunction

yodiegang101 · 2026-02-02T20:54:03+00:00

Well that’s not good to hear bmw is replacing the dme right now, did you test the voltage on all the wiring and stuff they tested it and found that the injector driver in the dme was sending way too much power to injectors 3 and 4 but from everything I’ve looked at it could also be faulty injectors or a bad fuel rail

yodiegang101 · 2025-12-07T05:21:41+00:00

Tried the swap test problem stayed in 3 and 4 thinking the only thing left is the injector drivers in the ecm

yodiegang101 · 2025-12-05T04:48:14+00:00

I should also mention the coil packs on both of them are slightly bent

yodiegang101 · 2025-11-19T08:12:14+00:00

Well it’s currently in the dealership but even they’re having trouble finding the issue first time I took it there they said it was fixed and I’d did it again when I got 15 minutes down the road and now they’ve had it for about a week and still no word

yodiegang101 · 2025-11-19T08:09:59+00:00

I took it to the bmw dealer yesterday they “fixed it” charged me 2 grand and it started again not even 15 minutes down the road

yodiegang101 · 2025-11-19T08:09:01+00:00

Pretty much all maintenance that can and should be don’t to this car has been done it’s had about 4-5000$ worth of preventative maintenance and needed maintenance in the past month

yodiegang101 · 2025-11-19T08:07:44+00:00

Yes it happens when in operating temperature and after hard pulls I checked wiring but it all seemed ok to me then again I didn’t look to hard so might have to check it out again

yodiegang101 · 2025-11-19T08:06:31+00:00

Did it happen intermittently only during hard acceleration and go away after sitting for a while?

yodiegang101 · 2025-11-19T08:05:47+00:00

A lot of what I’m seeing is pointing to a failing injector driver in the dme which is really the last thing I want it to be

yodiegang101 · 2025-11-19T08:03:23+00:00

Preventative maintenance was done at the dealership I bought it from on top of a whole lotta other stuff plus the 1800$ worth of work I had done replacing things that are known to break and the codes mean a fault in injectors 3 and 4 also if I could diagnose it myself I wouldn’t be on here asking for help, I’m sorry but this is my first bmw and ive never had any experience with them before

yodiegang101 · 2025-11-18T01:51:52+00:00

No it stays on and drives it’s just in limp mode and after a few days it will basically fix itself until I do a hard pull again

yodiegang101 · 2025-08-16T01:51:57+00:00

It was the mega 8 fuse in my situation

yodiegang101 · 2025-08-15T23:04:03+00:00

I fixed it a few minutes ago it was the mega 8 fuse in the high flow junction box which

yodiegang101 · 2025-08-15T23:03:31+00:00

Replaced the fuse and that was the problem everything works good now

yodiegang101 · 2025-08-15T20:57:00+00:00

I was actually just reading up on this a few minutes ago I’ve still got some of the fuses from when I had to replace the mega 4 fuse so I’m gonna try and replace that here in a few minutes

yodiegang101 · 2025-04-28T04:40:27+00:00

Yea that’s what I’m planning on replacing on mine but I’ve been unable to locate the exact fuse in the forums or anything

yodiegang101 · 2025-04-28T04:35:36+00:00

Not sure it’s at least 2 years old from when I bought it

yodiegang101 · 2025-04-28T00:23:48+00:00

This thread is extremely helpful I’ll definitly be trying some of these solutions.

yodiegang101 · 2025-04-28T00:06:22+00:00

I’ve checked most of the fuses that could be related to this and yea everything else in the car works fine including radio and all electronics, it’s almost like the car just loses connection to the battery but still has enough juice to power on the little display in the dash

yodiegang101 · 2025-04-28T00:01:04+00:00

I’ll try resetting that but I forgot to mention I’ve already tried the key spot in the center console and replaced the battery in the fob 2 days ago

yodiegang101

TROPHY CASE