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HOMESERVICE MANUALSBMW2013128I 2D CONVERTIBLE, ENG CD N52, STANDARD TRANSREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1012 (BRAKE SYSTEM - 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 is about a different car, the 2010 BMW 135i, 2009 BMW 135i, and 2008 BMW 135i. However, it is still accessible from the selected car via links, so may be relevant.
BRAKE SYSTEM 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  
BRAKE SYSTEM TROUBLESHOOTING CHART

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
  3. 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  . See 33 41 153 REPLACING WHEEL BEARING (OUTSIDE DIAMETER 85 MM) ON REAR AXLE SHAFT or 33 41 153 REPLACING WHEEL BEARING (OUTSIDE DIAMETER 85 MM) ON REAR AXLE SHAFT .
RENDER: 1.0x

NO RELATED

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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.