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HOMESERVICE MANUALSBMW2013128I 2D CONVERTIBLE, ENG CD N52, STANDARD TRANSREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1079 (BRAKES - REPAIR)TROUBLESHOOTING34 90... TROUBLESHOOTING BRAKE SYSTEM
2013 BMW 128i 2D Convertible, Eng CD N52, Standard Trans

34 90... Troubleshooting brake system

2013 BMW 128i 2D Convertible, Eng CD N52, Standard TransSECTION 34 90... Troubleshooting brake system
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2014 BMW X6, 2013 BMW X6, 2012 BMW X6, 2011 BMW X6, and 2010 BMW X6. However, it is still accessible from the selected car via links, so may be relevant.
TROUBLESHOOTING CHART

Fault Cause Remedy
Brake squeaks 1. Fouled brake system Remove and install, clean and grease brake calipers 
Clean and grease brake pads 
2. Pad wear excessive or one-sided Replace brake pads 
3. Brake disc not flush with floating caliper
  1. Clean guide screws, do not grease
  2. Clean contact face between wheel hub and brake disc
4. Contact pattern of pads and brake discs
  1. Visually inspect brake discs and pads
  2. If necessary, precision-turn brake discs 
  3. If necessary, replace brake discs and pads 
5. Rust edges on brake discs Precision-turn brake discs  or replace
6. Pad loose Replace brake pads 
7. Wrong type of pads Replace brake pads 
Fault Cause Remedy
Rattling, humming, steering wheel torsional vibrations during brake operation 1. Fouling of contact surface between brake disc and wheel hub Clean contact surface between brake disc and wheel hub
  2. Excessive thickness deviation within braking surface Measure brake disc thickness 
Precision-turn brake discs  or replace
  2. Contact pattern of pads and brake discs
  1. Visually inspect discs and pads
  2. If necessary, precision-turn brake discs 
  3. If necessary, replace brake discs and pads 
  4. Brake disc runout Precision-turn brake discs  , replace if necessary
  5. Excessive wheel bearing play Replace wheel bearing 
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.