Rear disc o normal wear and how to change

[saudidiscoman]

Had Haldex oil change including filter and they noted rear disc wear. Today I changed them with little tech requirement. Lots of specialised tools though. Main issue is electric brake. After jacking car up, engine on and drop handbrake and switch off. Then loosen Allen bolts on elec motor and remove caliper then remove elec motor. Note change in that motor now has male Allen key way which needs to be wound off. You must hold piston position with tool and after clockwise rotation of motor key way then push back the piston. Change of disc dies not require removal of caliper carrier, if you are careful! Refit motor to caliper and install new pads. Remember to pump, slowly the brake pedal before switching car electrics on!! If removing caliper carrier need 14 mmm square spline socket. For windback of elec motor need female Allen socket for 21+ plate model, earlier it was male socket required.