awdinut

I have a 'buzzing' type vibration that I feel in the accelerator pedal and also the floor where my left foot rests. And by buzzing I dont mean audible, but rather a tight vibration more like an electric sander as opposed to, say, the vibration a cupped tire would cause (mine are new).

I feel this at any speed if Im on the throttle even slightly. If I let off the gas the vibration disappears. So, since the car is still moving when Im off the throttle, I am ruling out wheel bearings. That doesnt leave many possibilities and I am wondering if I might have a bad motor mount that is transferring engine vibrations to the floor pan.

Could it be that the engine moves more than it should from the torque of being under throttle and touches metal to metal some how because the bad motor mount allows the movement ? Was this vibration felt by any of you who have had a bad motor mount ?

And would any of this result due to a bad trans mount ? Or does anyone have a different theory or experience to explain the phenomina ?

snapdragon

DO you have reactive engine mounts on your engine model/year?
If so, check for any codes for engine mounts in a VCDS scan as they only last a couple of years before der gummifötter ist kapput.
e.g.

2 Faults Found:
005495 - Right Engine Mount Solenoid Valve (N145)
P1577 - 001 - Open Circuit - Intermittent
Freeze Frame:
Fault Status: 00110001
Fault Priority: 0
Fault Frequency: 180
Mileage: 289473 km
Time Indication: 0
Date: 2011.12.05
Time: 08:08:12

Freeze Frame:
RPM: 1008 /min
Torque: 128.7 Nm
Speed: 0.0 km/h
Voltage: 11.78 V
Bin. Bits: 0
Bin. Bits: 0
Bin. Bits: 0

005491 - Left Engine Mount Solenoid Valve (N144)
P1573 - 001 - Open Circuit
Freeze Frame:
Fault Status: 01110001
Fault Priority: 0
Fault Frequency: 1
Mileage: 289473 km
Time Indication: 0
Date: 2011.12.05
Time: 08:08:12

Freeze Frame:
RPM: 1008 /min
Torque: 128.7 Nm
Speed: 0.0 km/h
Voltage: 11.78 V
Bin. Bits: 0
Bin. Bits: 0
Bin. Bits: 0

Readiness: 0 0 0 X 0