2015 BMW M4
Mileage
27,345
Service Date
7/14/2022
Services Performed
- CUSTOMER STATES THAT WHEN APPLYING THE BRAKES IT FEELS ABNORMAL LIKE THE ARE STICKING OR GRABBING. CHECKED BRAKING PERFORMANCE AND VERIFIED THAT THE FRONT BRAKES ARE HOLDING PRESSURE AFTER LETTING OFF THE PEDAL. ALSO FOUND THAT THE PEDAL TRAVEL WAS INSUFFICIENT AND BECAME STIFF THE MORE TIMES IT WAS PRESSED OR USED. BRAKE BOOSTER CHECKED OUT OKAY. INSPECTED FLUID AND FOUND CREAMY GRIME STOCK TO THE RESERVOIRS FILTER. PERFORMED A FLUID FLUSH AND NO FLUID SLOWED FROM THE FRONT CALIPERS WITH PRESSURE BLEEDER. FOUND FLUID FLOW ONLY WHEN BLED THE SYSTEM PRESSING THE BRAKE PEDAL. EVEN THOUGH FLUID WAS COMING OUT IT WAS NOT ENOUGH BLOW AND THE BRAKE PEDAL WAS VERY HARD TO PRESS DOWN WHEN THE SYSTEM WAS OPEN. DETERMINED FAULTY MASTER CYLINDER. REMOVED AND REPLACED THE MASTER CYLINDER ASSEMBLY. FLUSH THE HYDRAULIC SYSTEM AND THE FLUID FLOW WAS RESTORED EVEN ONLY USING THE PRESSURE BLEEDER. TEST DROVE VEHICLE AND BRAKING PERFORMANCE AND PEDAL SENSATION IMPROVED BUT THERE WAS STILL SOME GRABBING PRESENT. PERFORMED A FEW BRAKE FLUSHED WITH THE PRESSURE BLEEDER , MANUALLY ( PRESSING AND HOLDING THE BRAKE PEDAL). PERFORMED AN ABS AND DSC UNIT BRAKE FLUID SERVICE WITH AUTOLOGIC ( SCANNER/COMPUTER ) AND PERFORMED AN ABS AND DSC UNIT RESET. TEST DROVE VEHICLE BRAKING PERFORMANCE RESTORED.
PAXTON L. gave our service a 5 star review on 7/14/2022
