View Poll Results: Is your brake pedal hard when you press it to start the car in the Morning?
Voters: 51. You may not vote on this poll
Hard brake pedal at start up
#11
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There is a new bulletin for E90/E91/E92/E93 regarding this exact issue (However, there is not one for E60 yet). Bottomline is that this is not normal.
SUBJECT
Additional Effort Required to Press Brake Pedal Prior to Engine Initial Start
MODEL
E90, E91, E92, E93 (3 Series) produced up to 9/07
SITUATION
A customer may report increased brake pedal effort prior to engine start. This situation can occur if the vehicle sits for extended periods of time. Although the brake pedal can be depressed, the customer may note a change in pedal feel.
CAUSE
The vacuum check valve, fitted at the brake booster, may leak due to component tolerances within the valve assembly.
CORRECTION
Replace the vacuum valve and hose assembly for the brake booster; refer to Repair Instruction RA 34 33 051.
PARTS INFORMATION
Part Number Description Quantity
34 33 7 577 336 Vacuum Pipe 1
WARRANTY INFORMATION
Covered under the terms of the BMW New Vehicle Limited Warranty.
Please refer to the latest KSD for all applicable labor operations and allowances.
If the appropriate labor operation is not contained in KSD, then a work time labor operation should be used.
Defect Code 34 33 00 14 00
SUBJECT
Additional Effort Required to Press Brake Pedal Prior to Engine Initial Start
MODEL
E90, E91, E92, E93 (3 Series) produced up to 9/07
SITUATION
A customer may report increased brake pedal effort prior to engine start. This situation can occur if the vehicle sits for extended periods of time. Although the brake pedal can be depressed, the customer may note a change in pedal feel.
CAUSE
The vacuum check valve, fitted at the brake booster, may leak due to component tolerances within the valve assembly.
CORRECTION
Replace the vacuum valve and hose assembly for the brake booster; refer to Repair Instruction RA 34 33 051.
PARTS INFORMATION
Part Number Description Quantity
34 33 7 577 336 Vacuum Pipe 1
WARRANTY INFORMATION
Covered under the terms of the BMW New Vehicle Limited Warranty.
Please refer to the latest KSD for all applicable labor operations and allowances.
If the appropriate labor operation is not contained in KSD, then a work time labor operation should be used.
Defect Code 34 33 00 14 00
#12
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Originally Posted by hmc' post='505742' date='Dec 11 2007, 10:09 PM
I don't think it has anything to do with transmission. Actually it's worse for manual cars (imagine you are on hills when you start and brake pedal is hard)
My car doesn't...
Either way, I only skimmed the initial posts - for some reason I thought it had to do with the interaction with the automatic... some kind of "shift lock". I guess it's not related to that and not limited to the auto.
#13
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My Ride: 2007 BMW 550i Sport Pkg, 6MT
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I complained this issue to the dealership and they replaced booster and check valve. The problem persists.
The dealer ordered another 3 boosters and vacuum tested these boosters and they all leaks. The shop foreman says there is no spec requiring vacuum to hold over night which I don't really buy because my other 2 cars (11 year old and 8 year old), as well as the loaner 2008 BMW 328i, all hold vacuum over night.
The dealer ordered another 3 boosters and vacuum tested these boosters and they all leaks. The shop foreman says there is no spec requiring vacuum to hold over night which I don't really buy because my other 2 cars (11 year old and 8 year old), as well as the loaner 2008 BMW 328i, all hold vacuum over night.
#14
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Originally Posted by NeRwEEzy' post='505378' date='Dec 11 2007, 01:53 PM
for me, engine off=hard brake pedal all the time until start up. as the engine starts and my foot is still on the brake, the pedal eases up and softens to normal feel.
#15
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Yeah, the brake pedal is a tad stiff at start-up, bu it goes away instantly. No biggie as far as I'm concerned. Now if the brakes didn't squeal occasionally then I'd REALLY be happy. I've had it checked out before (brake squealing) and all they say is to do more heavy breaking to wear off the glaze on the brake pads. Whatever.....I've had nearly a dozen cars in my lifetime (Jap, American, German, Italian, etc...) and I've never had a brake squeal unless there was a problem.
#16
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very much like what has already been described,
- brake starts up stiff before start up
- softens instantly after start up
- only occasionally do i experience this
never thought of it as a recall problem, however, should we be concerned?
- brake starts up stiff before start up
- softens instantly after start up
- only occasionally do i experience this
never thought of it as a recall problem, however, should we be concerned?
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#17
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So I have had my BMW now for 8 days (new, 2008 535i). Never experienced the problem discussed, read this thread last night...now this morning on start-up I had a hard brake pedal at start-up, soften as the engine kicked in. Nothing new done to the car aside from filling it up with gas and really cold this AM (39F, cold for Los Angeles standards). So should I consult my service center regarding this problem?
#18
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happens to me rarely, when the car hasnt been started for more than a day.
or maybe i just havnt noticed it..
or maybe i just havnt noticed it..
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#19
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As a South Florida driver, I may have something to add.
The temperature is mostly above 60 degrees here all year round.
Last week, the temperature dropped into the 30's and 40's.
My brake lost all compression before startup when the temperature dropped below 50 degrees. I thought that this was weird. Now that the temperature is back to normal, the brake is back to normal.
I wonder if temperature contributes to the problem.
The temperature is mostly above 60 degrees here all year round.
Last week, the temperature dropped into the 30's and 40's.
My brake lost all compression before startup when the temperature dropped below 50 degrees. I thought that this was weird. Now that the temperature is back to normal, the brake is back to normal.
I wonder if temperature contributes to the problem.
#20
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Sam thing happened to my car. When the weather was warmer, it never happened but once the weather got cold, I started getting the hard brake pedal after teh car sat overnight.
When I asked my SA about it, he said that a few people complained about the same problem and he said that it's normal.
When I asked my SA about it, he said that a few people complained about the same problem and he said that it's normal.
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