Anyone else have this problem regarding the breaks?

E92 maniac · 11-16-2008, 08:20 PM

I have experienced some issues regarding my brakes when the car is parked over night. Every time when I try to start (cold start) the car in the morning after it has been parked overnight, the brake seems to be very stiff/hard. I have to apply a lot of force to step on the brake in order to start my car. I can't seem to figure out what is wrong as the brakes seem to be working fine, and I don't have this problem when the car is warm. Should i take it in to get it check? Any feedback will be appreciated! thank!

AdamJ · 11-16-2008, 08:23 PM

breaks...lol.

stimpy · 11-16-2008, 08:28 PM

Guys..seriously... give him a 'break'.

smallseafishie · 11-16-2008, 08:32 PM

Quote:

Originally Posted by Mystic_blue

I think you might have tough breaks.

OK, so the guy means "brakes"...

I have a 6MT so I don't know if that's normal or not since I only have to push my clutch to start the car...

But a brake pedal getting hard when cold doesn't seem odd to me. If it was limp, then that's a whole other story. If you go out and press on your brakes a few times after the engine is off, it'll get hard as well....

AlpineM6GC · 11-16-2008, 08:35 PM

sounds like a leaking brake booster to me.

E92 maniac · 11-16-2008, 08:44 PM

oh shit, i just realized that i have been typing the wrong 'BRAKE.' EDITED.

GregL · 11-17-2008, 12:48 AM

This has happened to me several times in past winters when it's ridiculously cold. The brake pedal is not limp as if pressure has been lost, it's instead rock solid and I can only depress it maybe half an inch to an inch which thankfully is enough to get the engine started. I always thought this to be normal given the ambient conditions on certain days.

mmm def · 11-17-2008, 06:30 AM

Mine does it randomly.

**335i** · 11-17-2008, 06:40 AM

its normal

tmarshall57 · 11-17-2008, 06:45 AM

This is a known problem and there is a fix. Service Bulletin reference (SIB) is SI B34 06 07. My car had this problem and it was fixed by the dealer last week. They mentioned a check valve or pipe or something. Itis fine now.

Tony

dreamnmotion · 11-17-2008, 03:53 PM

Quote:

Originally Posted by tmarshall57

This is a known problem and there is a fix. Service Bulletin reference (SIB) is SI B34 06 07. My car had this problem and it was fixed by the dealer last week. They mentioned a check valve or pipe or something. Itis fine now.

Tony

It's the brake vacuum. Well that's what it said on my service sheet. Just ask them to check the brake vacuum, they should be able to fix it.

noro · 11-17-2008, 03:57 PM

You probably have a very small vacuum leak. The booster generally hold a bit of vacum after the engine has been shut off so the next few times you press the brakes they should still appear to have the same assist. That said, it is also possible that the actual brake cylinder add a lot of friction when it's cold. Either way since it's a safety issue have it checked.

Hoothout · 11-17-2008, 04:00 PM

ive never noticed anything weird, the only thing ive noticed about cold starts and warm starts it the engine sound, it sounds louder in the cold

E92 maniac · 11-17-2008, 07:47 PM

thanks guys! i really appreciate the information. I will bring it in on friday.

SoCalTech · 11-17-2008, 08:35 PM

It's the one way check valve at the brake booster. Under certain conditions, it will cause the booster to lose it's vacuum. The fix is to replace the valve with the hose attached to it.

E92 maniac · 12-02-2008, 02:17 PM

my dealer refused to fix the problem for me as they told me that everything is working fine. What should i do?

SoCalTech · 12-02-2008, 03:01 PM

I'll find the bulletin number at work for you, and pm you tonight. Tell them the bulletin number and there shouldn't be a problem.

E92 maniac · 12-02-2008, 05:03 PM

I really appreciate your help! They actually printed out the bulletin, but the bulletin said this problem would only occur on E90s that were produced up to september 07. My production date is may 08. What should i do?? The car is still at BMWSF.

SoCalTech · 12-02-2008, 07:33 PM

They can't do the work and reference the bulletin, but they can still diagnose that as the problem. The problem might be known to happen on that production range, but that doesn't really mean anything. I would go to another dealer personally.
But basically, let them know that you need the problem fixed. There is a known issue, and if they want to satisfy the customer, they'll try to fix it.

11-16-2008, 08:20 PM	#1
E92 maniac LURKER 7 Rep 131 Posts Drives: CAUTIOUSLY Join Date: Dec 2007 Location: Fog City iTrader: (0)	Anyone else have this problem regarding the breaks? I have experienced some issues regarding my brakes when the car is parked over night. Every time when I try to start (cold start) the car in the morning after it has been parked overnight, the brake seems to be very stiff/hard. I have to apply a lot of force to step on the brake in order to start my car. I can't seem to figure out what is wrong as the brakes seem to be working fine, and I don't have this problem when the car is warm. Should i take it in to get it check? Any feedback will be appreciated! thank! __________________ Last edited by E92 maniac; 11-16-2008 at 08:44 PM..
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11-16-2008, 08:23 PM	#2
AdamJ Second Lieutenant 6 Rep 277 Posts Drives: BMW Join Date: Mar 2008 Location: California iTrader: (0)	breaks...lol.
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11-16-2008, 08:28 PM	#3
stimpy Colonel 183 Rep 2,210 Posts Drives: E92 335i Join Date: Feb 2008 Location: Phoenix AZ iTrader: (7)	Guys..seriously... give him a 'break'.
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11-16-2008, 08:35 PM	#5
AlpineM6GC Private First Class 11 Rep 155 Posts Drives: 2015 M6 GC 2024 X5 50e Join Date: Jul 2007 Location: Atlanta, GA iTrader: (1)	sounds like a leaking brake booster to me.
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11-16-2008, 08:44 PM	#6
E92 maniac LURKER 7 Rep 131 Posts Drives: CAUTIOUSLY Join Date: Dec 2007 Location: Fog City iTrader: (0)	oh shit, i just realized that i have been typing the wrong 'BRAKE.' EDITED. __________________
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11-17-2008, 12:48 AM	#7
GregL Brigadier General 107 Rep 3,618 Posts Drives: 2016 CLA45 AMG Join Date: Nov 2005 Location: GTA iTrader: (4)	This has happened to me several times in past winters when it's ridiculously cold. The brake pedal is not limp as if pressure has been lost, it's instead rock solid and I can only depress it maybe half an inch to an inch which thankfully is enough to get the engine started. I always thought this to be normal given the ambient conditions on certain days. __________________ 2016 Mercedes-AMG CLA45 2013 Mercedes-Benz B250 - Gone 2010 Mercedes-Benz C350 4Matic - Gone 2006 BMW 330xi - Gone 2001 Infiniti QX4 - Gone
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11-17-2008, 06:30 AM	#8
mmm def Colonel 153 Rep 2,611 Posts Drives: 21 330, 19 ND2 RF, 11 RX350 Join Date: Dec 2006 Location: NJ iTrader: (0)	Mine does it randomly.
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11-17-2008, 06:40 AM	#9
335i Colonel 192 Rep 2,320 Posts Drives: TOYOTA & 2008 E92 335i 6MT Join Date: Jul 2007 Location: Swiss iTrader: (4) Garage List 2008 335i [9.00]	its normal __________________ E92 335i Black Saphire 6MT PROcede V5, BMS DCI, Big Tom IC, AR CL-DP's 3", AR Design OC, Forge DV's, OEM M3 side skirts, BMW Performance Wheels 19 inch 269 Black Gloss+Continental ContiSportContact 5P (400hp and 550nm) https://www.youtube.com/user/aistis7..._as=subscriber
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11-17-2008, 06:45 AM	#10
tmarshall57 Captain 58 Rep 628 Posts Drives: F10 530d M Sport, E87 118d M Join Date: Apr 2008 Location: Bury, Lancs, UK iTrader: (0) Garage List 2018 X1 F48 SDrive 18d [0.00] 2009 BMW E87 118d M ... [0.00] 2012 BMW F10 530D M ... [0.00] 1997 K1100RS Specia ... [0.00]	This is a known problem and there is a fix. Service Bulletin reference (SIB) is SI B34 06 07. My car had this problem and it was fixed by the dealer last week. They mentioned a check valve or pipe or something. Itis fine now. Tony __________________ F10 530d M Sport, September 2012 Individual Amazonite Silver, Oyster Dakota Leather, Auto, Nav Pro, Bluetooth + USB Devices, Expanded BMW Online, Comfort Seats, Sunroof, Sun Protection Glass Individual Satin Walnut Honey Brown Trim Interior Inside/Outside Mirror with folding and autodip, M Rear Spoiler
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11-17-2008, 03:57 PM	#12
noro Colonel 93 Rep 2,707 Posts Drives: '91 M3, '04 E46 ZHP, '72 2002 Join Date: Aug 2006 Location: Boston iTrader: (0)	You probably have a very small vacuum leak. The booster generally hold a bit of vacum after the engine has been shut off so the next few times you press the brakes they should still appear to have the same assist. That said, it is also possible that the actual brake cylinder add a lot of friction when it's cold. Either way since it's a safety issue have it checked. __________________ zhpregistry.net - ZHP stats and free classifieds.
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11-17-2008, 04:00 PM	#13
Hoothout Colonel 62 Rep 2,799 Posts Drives: 2008 BMW E92 328i Join Date: May 2008 Location: Brentwood, TN iTrader: (0) Garage List 2008 e92 328i [0.00]	ive never noticed anything weird, the only thing ive noticed about cold starts and warm starts it the engine sound, it sounds louder in the cold __________________ 2008 SG E92 328i iDrive,Premium Pkg,Sport Pkg,Cold Weather pkg,Black Dakota Leather,GP Thunder 8500k cornering,drl,and foglights, ,Blacked Out Grills,Painted Reflectors,Shadowline Emblems,Hardwired Beltronics V-995, AFE Intake, Muffler Delete, Berger tune
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11-17-2008, 07:47 PM	#14
E92 maniac LURKER 7 Rep 131 Posts Drives: CAUTIOUSLY Join Date: Dec 2007 Location: Fog City iTrader: (0)	thanks guys! i really appreciate the information. I will bring it in on friday. __________________
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11-17-2008, 08:35 PM	#15
SoCalTech Captain 24 Rep 648 Posts Drives: Not a BMW yet... Join Date: Oct 2008 Location: Redondo Beach, Ca iTrader: (0)	It's the one way check valve at the brake booster. Under certain conditions, it will cause the booster to lose it's vacuum. The fix is to replace the valve with the hose attached to it.
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12-02-2008, 02:17 PM	#16
E92 maniac LURKER 7 Rep 131 Posts Drives: CAUTIOUSLY Join Date: Dec 2007 Location: Fog City iTrader: (0)	my dealer refused to fix the problem for me as they told me that everything is working fine. What should i do? __________________
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12-02-2008, 03:01 PM	#17
SoCalTech Captain 24 Rep 648 Posts Drives: Not a BMW yet... Join Date: Oct 2008 Location: Redondo Beach, Ca iTrader: (0)	I'll find the bulletin number at work for you, and pm you tonight. Tell them the bulletin number and there shouldn't be a problem.
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12-02-2008, 05:03 PM	#18
E92 maniac LURKER 7 Rep 131 Posts Drives: CAUTIOUSLY Join Date: Dec 2007 Location: Fog City iTrader: (0)	I really appreciate your help! They actually printed out the bulletin, but the bulletin said this problem would only occur on E90s that were produced up to september 07. My production date is may 08. What should i do?? The car is still at BMWSF. __________________
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12-02-2008, 07:33 PM	#19
SoCalTech Captain 24 Rep 648 Posts Drives: Not a BMW yet... Join Date: Oct 2008 Location: Redondo Beach, Ca iTrader: (0)	They can't do the work and reference the bulletin, but they can still diagnose that as the problem. The problem might be known to happen on that production range, but that doesn't really mean anything. I would go to another dealer personally. But basically, let them know that you need the problem fixed. There is a known issue, and if they want to satisfy the customer, they'll try to fix it.
	Appreciate 0 Quote