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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing / Warranty > 325i AT thudding / vibrating



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      01-05-2014, 07:41 AM   #1
Wedgit
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Unhappy 325i AT thudding / vibrating

Car was completely fine until last night. Under ~40 MPH I don't feel much but right above it there seems to be a thudding or wobbling feeling. Only gets worse at higher speeds it seems. Some other things I've noticed:

- no vibrating in steering wheel or pedals
- goes away when I give it gas, comes back when coasting
- not depending on whether or not I hit the brakes
- no rough idle
- seems a bit worse if I'm turning / wheel is not straight (ie taking an exit ramp off the hwy)

Plan on bringing it in today, but hoping to get some insight as to what this may be.
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      01-05-2014, 11:36 AM   #2
nate5ks
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Mounts maybe
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      01-05-2014, 11:42 AM   #3
Chriztofor
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Run flats are the culprit.
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If no codes are being thrown use Chevron Techron fuel injector cleaner (concentrate). It solves rpm fluctuating upon cold start-up. Also, for most BMW problems start off by scanning your car with the Peake Research Tool. It contains the actual BMW codes. If you want to register a newly installed battery for free (just buy a $10 cable) and google/download BMWLogger
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