Car "jolts" while braking

cwalker10 · 02-04-2008, 07:42 PM

Hi everyone,

I recently purchase an 03 Z4, and I noticed that the car kind of "jolts" right as it comes to a stop. I went by the dealership and they told me that this is normal for Z4s and M3s. They said that as the wieght shifts from the rear to the front, the drivetrain (I think they said drivetrain) shifts, which causes this light jolt. Does this sound correct? Does anyone else's Z4 do this? Or does this sound like a load of crap from the dealership? Thanks.

BlackSapphireZ · 02-04-2008, 11:14 PM

sounds like a load of shit

could it be auto shifting down to first?

scottmcke · 02-05-2008, 12:27 PM

I agree, that is crap. Is yous an automatic? What dealer did you buy it from? I got mine from Momentum BMW in Houston. So far they have been really good to me.

When the weather gets a little warmer, we need to get a bunch of Z's together for a meet in Houston. There are a few others on this list.

MTHEORY · 02-05-2008, 12:52 PM

Complete Bulls**t! You got to hand it to these dealers. They are expert BS artists.

561design · 02-05-2008, 01:45 PM

They're not even BS artists because that isn't even remotely logical. Most likely you have an automatic and the jolt you feel is it downshifting.

Reach · 02-05-2008, 02:07 PM

if you have an smg, thats the computer trying to decide when to have the clutch in or out while you slow to a stop. If you don't give it some clues as to what to do with gas / brake it gets a little confused at times.

cwalker10 · 02-05-2008, 08:24 PM

I thought it might be the auto shifting into first, but the rpms do not jump up when it happens. The jolt is slight, but definately exists. Thanks for the replys. I have been going to Advantage BMW in south Houston, but I have heard some bad things about them, so I think I will go by Momentum BMW. I just do not understand why a dealership would lie about this. They are not liable, the car is under extended warrenty from another company. To me, it would seem they would want to work on the car to get some $$$ out of me. This situation really ticks me off. I will keep you guys posted.

02-04-2008, 07:42 PM	#1
cwalker10 New Member 0 Rep 5 Posts Drives: 2003 BMW Z4 - Jet Black Join Date: Jan 2008 Location: Houston iTrader: (0)	Car "jolts" while braking Hi everyone, I recently purchase an 03 Z4, and I noticed that the car kind of "jolts" right as it comes to a stop. I went by the dealership and they told me that this is normal for Z4s and M3s. They said that as the wieght shifts from the rear to the front, the drivetrain (I think they said drivetrain) shifts, which causes this light jolt. Does this sound correct? Does anyone else's Z4 do this? Or does this sound like a load of crap from the dealership? Thanks.
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02-04-2008, 11:14 PM	#2
BlackSapphireZ Major 99 Rep 1,191 Posts Drives: 22 GLE 53 Coupe Join Date: Aug 2007 Location: Ladson, SC iTrader: (0)	sounds like a load of shit could it be auto shifting down to first? __________________ 2022 GLE 53 Coupe
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02-05-2008, 12:27 PM	#3
scottmcke Enlisted Member 1 Rep 48 Posts Drives: 2004 BMW Z4 3.0i Join Date: Oct 2007 Location: Houston, TX iTrader: (0) Garage List 2004 Z4 3.0i [7.00]	I agree, that is crap. Is yous an automatic? What dealer did you buy it from? I got mine from Momentum BMW in Houston. So far they have been really good to me. When the weather gets a little warmer, we need to get a bunch of Z's together for a meet in Houston. There are a few others on this list.
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02-05-2008, 12:52 PM	#4
MTHEORY Second Lieutenant 11 Rep 212 Posts Drives: 2003 996 Porsche GT2 Join Date: Aug 2007 Location: Las Vegas, Nevada iTrader: (0)	Complete Bulls**t! You got to hand it to these dealers. They are expert BS artists.
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02-05-2008, 01:45 PM	#5
561design z4um Hooligan 140 Rep 586 Posts Drives: 3.0Si Join Date: Apr 2007 Location: Woodstock,Ga iTrader: (1)	They're not even BS artists because that isn't even remotely logical. Most likely you have an automatic and the jolt you feel is it downshifting. __________________ Charles flickr
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02-05-2008, 02:07 PM	#6
Reach gone baby gone 382 Rep 1,052 Posts Drives: 2016 F80 Join Date: Nov 2007 Location: Location, Location. iTrader: (0)	if you have an smg, thats the computer trying to decide when to have the clutch in or out while you slow to a stop. If you don't give it some clues as to what to do with gas / brake it gets a little confused at times.
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02-05-2008, 08:24 PM	#7
cwalker10 New Member 0 Rep 5 Posts Drives: 2003 BMW Z4 - Jet Black Join Date: Jan 2008 Location: Houston iTrader: (0)	I thought it might be the auto shifting into first, but the rpms do not jump up when it happens. The jolt is slight, but definately exists. Thanks for the replys. I have been going to Advantage BMW in south Houston, but I have heard some bad things about them, so I think I will go by Momentum BMW. I just do not understand why a dealership would lie about this. They are not liable, the car is under extended warrenty from another company. To me, it would seem they would want to work on the car to get some $$$ out of me. This situation really ticks me off. I will keep you guys posted.
	Appreciate 0 Quote