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E90/E91/E92/E93 (2006 - 2013)
The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

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  #1  
Old 02-06-2014, 12:49 PM
spiker5127 spiker5127 is offline
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Location: Watertown,ny
 
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Mein Auto: 3series
Brake issue

My 3 series Xi doesn't coast when I let off the gas pedal. It slows fast and appears to be a mechanical brake slowing the vehicle. I almost don't need a brake pedal in the city? Anybody ever see this?
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  #2  
Old 02-06-2014, 01:15 PM
Pilgrim Pilgrim is offline
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Location: Fort Collins, CO
 
Join Date: Aug 2006
Posts: 416
Mein Auto: 2009 328iX Coupe
It's probably engine braking, not the brakes.

But.....you can take it out on an empty road, and WITHOUT using the brakes, speed up and slow down (coasting) repeatedly at slow to moderate speed. Then pull over and stop gently, using the brakes as little as possible.

If you have a hot rotor, then that brake is dragging. If not, it's not the brakes.
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  #3  
Old 02-06-2014, 01:17 PM
mossman35 mossman35 is offline
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Location: VT
 
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Mein Auto: 2011 335i x Coupe M sport
Why not just put the car in neutral and see if it coasts longer? If so, it's probably engine braking as mentioned.
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Old 02-06-2014, 03:46 PM
spiker5127 spiker5127 is offline
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Location: Watertown,ny
 
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Mein Auto: 3series
I did both. Brakes were cold. I then put it in neutral and it coasts fine. It's some sort of unnecessary engine braking. But it's not good/normal. Maybe a malfunction of the down hill assist feature? It's a 328xi, auto.
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Old 02-06-2014, 06:43 PM
FeliciaACasale FeliciaACasale is offline
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Location: New Jersey
 
Join Date: Oct 2013
Posts: 5
Mein Auto: E92
I was just going to say it might be connected to HDC or something that happened to me in traffic lol not sure why but I just recently had an engine coil changed and it hasn't done it .. Let me know what happens I'm curious


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  #6  
Old 02-06-2014, 06:56 PM
spiker5127 spiker5127 is offline
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Location: Watertown,ny
 
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Mein Auto: 3series
It's under warranty and I have an appointment next week. I'll post the results.
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  #7  
Old 02-06-2014, 06:56 PM
ddeliber ddeliber is offline
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Location: Boston Area
 
Join Date: Jan 2013
Posts: 324
Mein Auto: E350 & 2011 335d
Is this a new symptom or has it been happening forever? Anything change recently?

Does it happen after the car warms up or is it just when cold/cool? Mine will up-shift when coasting but only after it warms up (it is a d so it takes a while).
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Old 02-06-2014, 07:16 PM
ptrcd003 ptrcd003 is offline
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Location: Toronto
 
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Mein Auto: 328i LCI
Is this your first BMW? This is normal.
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