Contents Wiring diagrams Section: Mechanical - Hydraulic All sections

Brakes - Tightening Torques BMW Z4 E89

34 33 Brake Booster

TypeThreadTightening specificationMeasure
1AZBrake booster to pedal assembly consoleE89M8Replace self-locking nuts Retighten 1x after 5 minutes on brake booster22 Nm

TIGHTENING TORQUE SPECIFICATION - BRAKE BOOSTER

34 32 Brake Lines

TypeThreadTightening specificationMeasure
1AZBrake line screws/union screwsE89M12 x 112 Nm
E89M10 x 112 Nm
2AZBrake hose to brake caliper, frontE8924 Nm
3AZBrake hose to brake caliper, rearE8924 Nm
4AZBrake hose holder to trailing arm, rearE898 Nm

TIGHTENING TORQUE SPECIFICATION - BRAKE LINES

34 31 Brake Master Cylinder

TypeThreadTightening specificationMeasure
1AZBrake master cylinder to brake booster (vacuum)E89M8Replace self-locking nuts21±3 Nm

TIGHTENING TORQUE SPECIFICATION - BRAKE MASTER CYLINDER

34 11 Front Brake

TypeThreadTightening specificationMeasure
1AZBrake disc to wheel hubE89Replace screws16 Nm
2AZBrake anchor plate to swivel bearingE89M12x1.5110 Nm
3AZGuard plate to swivel bearingE89M6Replace self-locking or microencapsulated screws12 Nm
4AZGuide screw (socket head cap screw)E89WAF 730 Nm
5AZGuide screw (hexagon screw)E89WAF 13Replace self-locking or microencapsulated screws35 Nm

TIGHTENING TORQUE SPECIFICATION - FRONT BRAKE

34 41 Parking Brake

TypeThreadTightening specificationMeasure
1AZEMF actuator to brake caliperE89Replace screws11±1 Nm

TIGHTENING TORQUE SPECIFICATION - PARKING BRAKE

35 11 Pedal Assembly Console

TypeThreadTightening specificationMeasure
1AZBearing pedestal to brake assembly and bodyE89M8Replace self-locking nuts Retighten 1x on brake booster after 5 min21 Nm

TIGHTENING TORQUE SPECIFICATION - PEDAL ASSEMBLY CONSOLE

34 21 Rear Brake

TypeThreadTightening specificationMeasure
1AZBrake disc to wheel hubE89M8Replace screws16 Nm
2AZBrake anchor plate to wheel carrierE89M12x1.5110 Nm
3AZProtective plate to wheel carrierE89M6Replace screws12 Nm
4AZGuide screw (brake caliper to brake anchor plate)E89Wrench size 13 mm35 Nm

TIGHTENING TORQUE SPECIFICATION - REAR BRAKE

34 51 Slip control system (DSC)

TypeThreadTightening specificationMeasure
1AZControl unit to hydraulic control unitE89Initial tightening Final tightening2±0.5 Nm 4.3+0.5 Nm
2AZDSC sensor to holderE898 Nm
3AZBracket, DSC sensor, to bodyE898 Nm
4AZPulse generator to swivel bearing/wheel carrierE898 Nm
5AZBracket to hydraulic unitE898 Nm
6AZBracket, hydraulic unit to bodyE898 Nm

TIGHTENING TORQUE SPECIFICATION - SLIP CONTROL SYSTEM (DSC)

34 00 Testing and bleeding brakes

TypeThreadTightening specificationMeasure
1AZVent valveE89Wrench size 9 mm7-11 Nm
E89Wrench size 11 mm12-18 Nm

TIGHTENING TORQUE SPECIFICATION - TESTING AND BLEEDING BRAKES