Could be a bad voltage regulator. They do funky things sometimes.
Pros: easy to replace
Vehicle:
BMW
Reviews of spare parts for BMW
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For whats its worth, I had mine replaced at Safelite and haven't had any issues 4 months later. They used Pilkington glass which is OEM for BMW. HUD still works great. ACC did need recalibration the next day (City Safety features turned off) but they were able to do it at Safelite with Bosch equipment. I use Pilot Assist for >50% of my driving and it is functioning the same as before.
Pros: HUD still works great
Cons: ACC needed recalibration
Vehicle:
BMW
Used Zimmerman rotors with Akebono pads
Pros: easy to use
Vehicle:
BMW
I’ve replaced them alone (i’m not a tech, i am not even a beginner).
NGK plugs, 60 euros bought online, some tools i already owned, and I struggled with the spark plug socket, found it at a tech friend, the thing is that is necessary to be thin and i needed to borrowed a torque wrench. Half an hour of work.
Pros: easy to replace
Cons: needed special tools
Vehicle:
BMW
I use a bottle of RedEx every few tanks in my 2015 320d, which is on about 90k. It seems to have increased my fuel economy by about 5%, tested by doing the same 200 mile route many times.
Pros: increased fuel economy
Vehicle:
BMW
Mileage: 144840 km
I would stick to Bosch, Mann & Mahle for filters.
Pros: reliable filter brands
Vehicle:
BMW
Those are very good EBC pads, they also don’t destroy rotors. I will warn you that a brake bedding is absolutely critical with those. They very much rely on the transfer layer for better stopping performance and to not destroy your rotors. Thankfully, usually within 2 to 3 laps they have enough heat in them that you’re able to get a good transfer layer going.
Pros: good EBC pads
Cons: brake bedding critical
Vehicle:
BMW
Few months ago I got all 6 OBD1 Bosch coil packs and it changed nothing for me other than a slightly smoother top end, I still have a slight misfire at idle.
Pros: slightly smoother top end
Cons: slight misfire at idle
Vehicle:
BMW
I had all new Bosch coils installed on my e46 M3 about 30k miles ago. They worked fine, until one day the car went into limp mode due to bad coil / misfire.
Pros: worked fine initially
Cons: bad coil, misfire, limp mode
Vehicle:
BMW
Mileage: 48280 km
I had a pair of depo headlights, maybe the same ones there. They started with good light output and relatively quickly degraded on the low beam with the projector. I got a chance to drive that car again and they are pretty terrible now, warning.
Pros: good light output initially
Cons: quickly degraded
Vehicle:
BMW
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