Brake problem

B

Bumwah

Member
Sometimes when applying the foot brake the pedal is hard to press and braking is poor. If I stop the car and restart brakes are fine also when brakes are playing up acceleration is not as responsive.
Any help, suggestions greatly appreciated
 
Classic brake servo booster vacuum leak, either the check-valve or pipe split/collapsed, or the servo booster unit. Neither are hard or massively expensive jobs (in the big scheme of things) there are lots of previous posts and youtube vid's on the topic.
 
Probably a fault or air leak with the Servo Unit causing this, check all hoses for leaks and main unit diaphram inside has not split.
https://www.realoem.com/bmw/enUS/showparts?id=BT32-EUR-04-2003-E85-BMW-Z4_25i&diagId=34_1318
Diagram for parts on a 2003 2.5, put your last 7 letters and digits of Vin number in the home page to bring back parts for your actual car.
 
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