Sudden Kick (push forward) while in standstill - BMW Forum

90rr · 04-30-2012, 11:17 AM

Hi Everyone
I tried search and nothing useful came up. Hope I will have more luck here . I have a ’07 328i and have been a very reliable and fun to drive so far . However when I'm at a complete stop I feel a “kick” , like car pushing forward just for fraction of the second . Sometimes a ‘Kick” is so powerful that feels like someone just hit my bumper. It’s happening most of the time , sometimes more sometimes less, sometimes there 3-4 short kicks in couple seconds . But ONLY when A/C is on… If I turn A/C off ,no more kicks . I read somewhere that it could be a “torque converter “ and software refresh might be needed . Anyone experienced something like this ?
Thank you in advance .

Lord Vader · 05-01-2012, 12:25 AM

Is this while in drive, or neutral? How much force do you have applied to the brakes when this occurs?

brettski · 05-01-2012, 05:57 AM

Depending on how many miles/kms youve done, it might be time to change the ATF fluid and filter.

90rr · 05-03-2012, 08:55 AM

I don't think that is a transmission . Even in neutral or parking is still happening . Feels like when you release a brake for fraction of the second (car trying to push forward ). kick are completely random , but only when i have my foot on the brake . sometimes i feel 3-4 quick jolts . It drives me crazy .

Lord Vader · 05-03-2012, 10:46 AM

Thats odd. If you can take it to get the OBD system scanned for codes. You may not have a CEL but if theirs an issue a code could still be present.

90rr · 05-03-2012, 11:11 AM

I had a few codes related to abs and hydro pump . they came twice in couple of days and disappeared . 10-12 days later i started to feel kicks more and more often .

here is my post about that ...
cc id 24 ...question - BMW 3-Series (E90 E92) Forum - E90Post.com

Lord Vader · 05-03-2012, 12:48 PM

ABS Sensor? When it went in my truck it would cause the abs to kick in under braking. I'm not sure if it could cause the push though.

90rr · 05-03-2012, 02:08 PM

If i push in neutral and release foot from brake pedal it stops .

90rr · 05-04-2012, 04:04 PM

actually i just felt a slight bump in neutral as well

Lord Vader · 05-05-2012, 12:25 AM

This is nuts. Are you sure its not your transmission? Would the dealer be willing to do a reflash just in case?

Too many possibilities.

Stompbox · 05-05-2012, 01:35 AM

Sounds like a motor mount issue to me... If its doing it in drive and neutral, its a definite possibility.

90rr · 05-07-2012, 08:24 AM

couple days ago i disconnected battery for few and jolts are 95% percent gone ! i still fell very weak kicks ( maybe once ,twice a day ) but is't night and day difference ...