A new control arm-to-rear subframe pivot bolt and nut will be required on installation. To remove the coil spring, loosen and remove the control arm-to-trailing arm pivot bolt, noting the bolt's direction. Support the weight of the unit with a jack and remove the final drive unit mounting bolts to allow room for the pivot bolt withdrawal, or alternatively, remove the driveshaft. Loosen and remove the nut from the control arm-to-rear subframe pivot bolt, then withdraw the bolt while slightly moving the final drive unit to the rear, and remove the control arm from underneath the car, also removing the control arm-to-subframe bolt. On some models, detaching the propeller shaft from the final drive unit may be necessary for clearance to remove the pivot bolt. If the car will be left for some time, reinstall and securely tighten the final drive unit mounting bolts. For overhaul, thoroughly clean the control arm and surrounding area, checking for cracks, distortion, or wear, especially on the bushing, which should be replaced at a BMW dealer or suitably-equipped garage if necessary. Inspect the pivot bolts for wear or damage and replace them as needed, along with the control arm-to-subframe bolt and nut. For installation, maneuver the control arm into position and install the new arm-to-subframe pivot bolt and nut, tightening the nut lightly at this stage. Position the final drive unit and tighten its mounting bolts to the specified torque, reconnecting the propeller shaft if necessary. Reinstall the pivot bolt and nut securing the control arm to the trailing arm, inserting it from the rear and tightening it lightly. Reinstall the coil spring, then lower the car to the ground and rock it to settle all disturbed components. With the car on its wheels, tighten the heel bolts, shock absorber lower mounting bolt, and control arm pivot bolts to their specified torque settings. It is advisable to have the camber angle and wheel alignment checked and adjusted if necessary, followed by tightening the wheel bolts to the specified torque.
Posted by BMWPartsDeal Specialist 
