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Steve, BMW Expert
Category: BMW
Satisfied Customers: 25230
Experience:  BMW Expert
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My brakes (318si - 4 years old) suddenly went hard at the weekend

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My brakes (318si - 4 years old) suddenly went hard at the weekend and there was no way i could drive it safely as when i tried it a few times on a side road I could not brake so had to be towed back 60 miles home. The RAC mechanic thinks it may be a servo problem but any idea what the issue could be?

hello and welcome


this does suggest a brake booster (servo) failure. this will require replacement of the booster and/or lines.


the other possibility would be a hydraulics failure of some kind.


you will need to have the system inspected hands on by a BMW specialist to verify 100%


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