[f30regan]

I have a 2014 335i f30 rwd, 8spd auto with 66k miles. I noticed for about a few months now that every time I floor it at around highway speeds, my car starts to vibrate. When I say vibrate, I mean the body, pedals, and steering wheel. I've tested accelerating from a stop full throttle and it does not have this issue (0-60). I suspect that it is either the spark plugs which I have not changed, driveshaft, engine mounts, or bent wheel? I also checked my codes on bm3 and it did not show any misfiring.
Current mods:
BM3 stage 2
ARM 4" catless downpipe
vrsf chargepipe
muffler delete
OEM 400m rims
235/40/18 michelin sport 4s
265/35/18 michelin sport 4s
H&R super sport springs

[thejeremyman9]

Are you at low RPM and high load in a high gear without downshifting? Its possible its just the behavior of the tune, other people talk about similar feelings. If the plugs are original you should definitely replace them anyways but may not change that.

[f30regan]

I've never had any problems in the past, it started a few months back. Low/high RPM full throttle still vibrates. Down shifting does not help.

[_ObiJon]

If it immediately stops when you let off the gas, I'd say driveshaft too.

[BMWILUVU]

Originally Posted by f30regan

I have a 2014 335i f30 rwd, 8spd auto with 66k miles. I noticed for about a few months now that every time I floor it at around highway speeds, my car starts to vibrate. When I say vibrate, I mean the body, pedals, and steering wheel. I've tested accelerating from a stop full throttle and it does not have this issue (0-60). I suspect that it is either the spark plugs which I have not changed, driveshaft, engine mounts, or bent wheel? I also checked my codes on bm3 and it did not show any misfiring.
Current mods:
BM3 stage 2
ARM 4" catless downpipe
vrsf chargepipe
muffler delete
OEM 400m rims
235/40/18 michelin sport 4s
265/35/18 michelin sport 4s
H&R super sport springs

If its every-time, then log it. Vibrations could be many things but rule out the engine components first imo. For example, one of my vibration incidences ended up being a loose front spoiler and yea it ended up bouncing my engine up and down at speed.