Question Firm Brake Pedal

Cobber77 · 10-15-2015, 09:19 AM

Newer 135i owner here - I'm experiencing a firm brake pedal on startup. Just started happening about a week ago. I enter the vehicle - put my foot on the pedal and it's very firm until I start up the vehicle - then it goes away. Any ideas??

MightyMouseTech · 10-15-2015, 09:22 AM

Normal. Will be firm until the engine vacuum is applied to the brake booster.

Pissoff · 10-15-2015, 09:32 AM

Vacuum reservoir is leaking down.

MightyMouseTech · 10-15-2015, 09:36 AM

Quote:

Originally Posted by Coleroad

Vacuum reservoir is leaking down.

That could be as well. The check valve on the booster may be leaking.

mr.fabulous · 10-15-2015, 09:38 PM

why is that not normal?

Cobber77 · 10-16-2015, 08:20 AM

This is new - wasn't an issue for the first few months. Any ideas on repair options?

10-15-2015, 09:19 AM	#1
Cobber77 Enlisted Member 14 Rep 45 Posts Drives: 2009 135i Join Date: Jun 2015 Location: BGM iTrader: (0)	Question Firm Brake Pedal Newer 135i owner here - I'm experiencing a firm brake pedal on startup. Just started happening about a week ago. I enter the vehicle - put my foot on the pedal and it's very firm until I start up the vehicle - then it goes away. Any ideas??
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10-15-2015, 09:22 AM	#2
MightyMouseTech Major General 4338 Rep 6,196 Posts Drives: 13 135i 6MT LeMans Blue MSport Join Date: Feb 2013 Location: Ottawa, Canada iTrader: (0)	Normal. Will be firm until the engine vacuum is applied to the brake booster.
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10-15-2015, 09:32 AM	#3
Pissoff Banned 55 Rep 206 Posts Drives: 08, 128i e88 Join Date: May 2015 Location: Fuck you iTrader: (1)	Vacuum reservoir is leaking down.
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10-15-2015, 09:38 PM	#5
mr.fabulous Captain 209 Rep 893 Posts Drives: Women Crazy Join Date: Dec 2014 Location: Florida Gulf Coast iTrader: (0)	why is that not normal? __________________ 2011 135i MSport 6MT AW/black, 72Kmiles, bone stock, moneymoneymoneymoneymoneymoneymoneymoneymoneymoney I LOVE THIS CAR
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10-16-2015, 08:20 AM	#6
Cobber77 Enlisted Member 14 Rep 45 Posts Drives: 2009 135i Join Date: Jun 2015 Location: BGM iTrader: (0)	This is new - wasn't an issue for the first few months. Any ideas on repair options?
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