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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing / Warranty > Hard brakes on cold start



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      10-09-2012, 04:21 PM   #1
Rae604
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I have a 2006 325i

Iv noticed recently on cold starts iv been having a hard time pressing on the brakes to start the car, there's a lot of resistance. After the car is up and running the brakes go back to normal, I was just wondering if that's normal or is something wrong ?

Please let me know what you guys think

Thanks
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      10-10-2012, 09:42 PM   #2
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Anyone ?
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      10-10-2012, 10:10 PM   #3
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Doesn't sound good. Does the car still stop in normal braking distance when it's hard? Could be many things from a bad brake booster to who knows. I would go to a shop to diagnose
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      10-10-2012, 10:31 PM   #4
Rae604
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After i turn on the car in the morning, the rest of the day is fine. No problems what so ever, brakes fine at stop lights, stops you name it. It's just in the morning when I first try turning on the car, there's just a lot of resistance on the brake but once the car is up and running the brakes go back to its original position.

This happen rarely, I read something yesterday and I think it's the vacuum valve in the booster brakes.
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      10-11-2012, 11:32 AM   #5
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There was an SIB for this somewhere. AT guys couldnt even depress the brake pedal enoguh to start the car. I forget what the cause was, but I think it was a vacuum line to the booster or something...
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