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      04-04-2012, 08:08 AM   #1
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Question Brake pedal extremely stiff on starts?

So I've proly been driving my car around for about 2 weeks now and I'm always taken back by it after a long couple month break, just the feeling and the sounds she makes when you start her up. I feel complete again...

Anyhow I have a question to ask if anyone else has ever expiereince the following before. The past 3 times I've gotten in to start the brake pedal goes extremely stiff and is a bear to get down enough to start it. If I just depress is slightly and hit the start/stop button only the electronics come on as if I didn't have any pressure on the pedal at all. I've tried sitting there to see if it'll loosen itself up by it doens't seem to be doing that, so I end up putting down a good amount of force to get it to the point where it will turn over. After the start up everything is fine and the pedal acts normal, I haven't had this "problem" (Not really sure it is) before but was just curious if anyone elses acts like this sometimes....
2009 E92 M3 /// Melbourne Red /// Fox Red /// M DKG

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      04-04-2012, 08:54 AM   #2
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Sounds like the vacuum created by the engine to reduce the amount of pedal pressure required to operate the brakes is bleeding away quicker than usual. A hard pedal after a week might be regarded as normal but overnight probably not.
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      04-04-2012, 12:57 PM   #3
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This happens when I start my car from time to time. Not sure why but haven't had any issue so I haven't reported it. I thought it was just an M3 nuance.
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      04-04-2012, 02:27 PM   #4

Drives: 2011 E90 M3
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Originally Posted by Twinbo View Post
This happens when I start my car from time to time. Not sure why but haven't had any issue so I haven't reported it. I thought it was just an M3 nuance.
+1. Noticed it too, chalked it up to a "feature". Only reason I've noticed it is you have to depress the brake to start the car, and a couple of times it wouldn't start because I hadn't depressed it enough.
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      04-04-2012, 02:32 PM   #5
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I have been noticing this issue with my car lately also. I usually only have this problem when I start my car on the morning after it has been sitting in the garage all night.
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