my BMW X3 G01 (2018-2024) has a knocking noise at low speeds

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Ensure the vehicle is parked on a flat surface and the engine is off.
• Disconnect the battery to prevent any electrical issues while working.

2. Inspect Suspension Components

• Tools Required: Jack and jack stands, socket set, torque wrench.
• Lift the vehicle using a jack and secure it with jack stands.
• Remove the front wheels to gain access to the suspension components.
• Visually inspect control arms, bushings, and struts for signs of damage or excessive play.

3. Replace Damaged Components

• If any components are found to be worn or damaged:
  • Control Arms:
    1. Remove the bolts securing the control arm to the chassis and the steering knuckle.
    2. Replace the control arm with a new one, ensuring proper alignment.
    3. Torque bolts to manufacturer specifications.
  • Bushings:
    1. Remove the old bushings from the control arm using a bushing removal tool.
    2. Press in new bushings and ensure they are seated properly.
  • Struts:
    1. Remove the strut assembly from the vehicle.
    2. Replace any worn strut components and reassemble.
    3. Install the strut assembly back into the vehicle, torquing all bolts to specifications.

4. Reassemble and Reinstall Wheels

• Reinstall the front wheels and lower the vehicle.
• Torque wheel lug nuts to manufacturer specifications.

5. Final Checks

• Reconnect the battery and perform a test drive to confirm the knocking noise is resolved.