Lighting and Horns

General

Tightening torque

General tightening torque

NOTE: Screws coated with a locking fluid or self locking nuts must be replaced with new when reinstalled.

See the table below to find the tightening torques for components not included in the summary.
Nuts and screws which are not self locking can be reused provided that they are in good condition.

Applies to screwed joint with strength class 8.8.

Thread Tightening torque (Nm)
M5 5
M6 10
M7 17
M8 24
M10 50
M12 80
M14 130

Summary of tightening torques for specific components

NOTE: Screws coated with locking fluid or sealant must be replaced with new when reinstalled.

Always use new screws and nuts when angle tightening. Any exceptions to this rule will be indicated in the method.

Angle-tightening in tight spaces.

Antenna, top nut 3 Nm
Tail lamp 10 Nm
Battery connector 2.5 Nm
Battery cable for battery 2.5 Nm
Stop lamp, trunk lid 2 Nm
Screw, bracket, position sensor, 6 Nm
rear, headlamp
Generator B+ terminal 15 Nm
Generator, freewheel pulley 80 Nm
Engine control module (ECM) 3 Nm
connector, B4164S3
Nut accelerator pedal 8 Nm
Active yaw control sensor (AYC) 3.7 Nm
Washer reservoir 3 Nm
Starter motor 40 Nm
Starter motor B+ terminal 15 Nm
Wiper arm windscreen M8 18 Nm
Wiper arm windscreen M10 21 Nm
Rear window wiper arm 14 Nm
Nut, main fuse, battery 14 Nm