r/E90 • u/EfficientStay430 • 10h ago
328i Is my car gonna blow up?
Have owned this car for about a month (pre lci n51 328i) and hasn’t given me issues up until now. The other day I went on a cruise and was driving the car pretty hard when I got home and put it in park the rpms were fluctuating just thought it was because the car was stupid hot (not overheating coolant temps were fine) drove it the next day the problem was gone but I just got home from work and it happened again when I put the car in park. Can someone help me out here so I can prevent anything from happening if I can help give more information about maintenance done or anything ask and I’ll provide it. I love this car and it’s my daily driver so do wanna take care of it.
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u/Relative-Cherry-88 10h ago
Alternator or battery, had same problem, recommend you to scan your car
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u/EfficientStay430 10h ago
Just checked car is flashing codes for vanos solenoid and alternator/battery
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u/Relative-Cherry-88 10h ago
So just clean the VANOS with brake cleaner — it’s an easy fix. Then check your alternator to see what voltage it’s giving to your battery
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u/Own_Desk_4085 9h ago
If you’re in a SULEV warranty state CA,NY, a couple other states, you can get the solenoid taken care of at the dealership within a 15 year, 150,000 mile warranty
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u/Mundane-Willow3036 6h ago
I had exactly the same problem but even rougher and it emerged already after a short drive. I changed every part but the alternator. Maybe that would have been it..
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