Genuine BMW M3 Control Arm

BMW M3 Control Arm Parts Questions & Answers

• Left Wishbone
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  Q: How to removal and install lower control arms in BMW M3?

  A: REMOVAL & INSTALLATION for E30 Models involves raising and supporting the vehicle, removing the front tire, and using wire to secure the strut. Disconnect the rear control arm bushing bracket, remove the nut and disconnect the link on the front stabilizer bar, unscrew the nut attaching the control arm to the crossmember, and press off the ball joint using the appropriate tool. During installation, ensure clean ball joint studs and bores, replace original nuts with new ones, and tighten according to specified measurements. Reattach the control arm bushing bracket, stabilizer bar link, and install the wheel and tire assembly before lowering the vehicle. For E36 Models, start by loosening the lug bolts, raise the vehicle, and remove the front tire. Disconnect the rear control arm bushing bracket, remove the front stabilizer bar bracket locknut, and secure the Steering Knuckle using wire. Remove and unscrew specific parts as detailed, and follow specified tightening measurements during installation. If the tapered ball joint spindles rotate, use specific methods to seat the spindle. Reattach the wheel and tire assembly, lower the vehicle, and check alignment. For CONTROL ARM BUSHING REPLACEMENT in E30 Models, the bushings must be pressed out, and BMW bushings are notably difficult to remove. A high-capacity hydraulic press, lubricant, and proper mandrels should be used, with bushing orientation marked for correct replacement. For E36 Models, remove the control arm, measure specific distances, mark control arm parts for reference, press off the old bushing, duplicate markings, and follow specific pressing and installation procedures. After installing the control arm, ensure the vehicle is weighted correctly for a set period, allowing any used agent to evaporate. Finally, test drive and check alignment, making adjustments as needed.
• Right Wishbone
  31-12-2-227-250
  Q: How to remove and replace the Control Arm on BMW M3?

  A: The independent rear suspension on E30 models consists of left and right trailing arms with pressed-in Wheel Bearings and bushings. To remove the trailing arm, the drive axle can be removed without special tools. However, if replacing the trailing arm, special tools are needed for the drive flange and wheel bearing. The process involves removing the wheel center caps, loosening the axle spindle nut, and removing the axle from the rear Wheel Hub. The parking brake cable and hydraulic brake line should be disconnected, and the lower shock bolt should be removed to lower the trailing arm. The through bolts and lock washers can then be removed to lower the trailing arm from the vehicle. When installing, the rear suspension fasteners should be torqued to the specified values. For E36 models, the independent rear suspension includes trailing arms, upper and lower control arms, and allows for easy adjustment of rear toe and camber. The process for removing and replacing the trailing arm is similar to that of E30 models, with the addition of removing the rear spring, disconnecting the upper sway bar bracket, and removing the ABS cable. The upper control arm and lower control arm can also be removed and replaced, with the process involving disconnecting the driveshaft from the differential and supporting the differential assembly. The specified torque values should be followed when installing the control arms.