why is my BMW 3 Series G20/G21 (2019-2024) making a knocking noise when driving?

Solution

1. Preparation

• Gather necessary tools and ensure the vehicle is parked on a flat surface.
• Disconnect the battery to ensure safety while working on electrical components.

2. Inspect and Replace Suspension Components

• Tools Required: Socket set, torque wrench, jack stands, suspension tool kit.
• Sub-steps:
  1. Lift the vehicle using a jack and secure it with jack stands.
  2. Remove the wheel to access suspension components.
  3. Inspect the struts and shocks for signs of leakage or damage.
  4. Check control arms and bushings for wear; replace any damaged parts.
  5. Reassemble the suspension components and torque to manufacturer specifications.

3. Check and Replace Engine Mounts

• Tools Required: Socket set, engine hoist (if necessary).
• Sub-steps:
  1. Identify the engine mounts by locating them on the engine block and subframe.
  2. Inspect for cracks or excessive wear; if damaged, remove the bolts securing the mounts.
  3. Install new engine mounts and ensure they are properly torqued.

4. Inspect and Repair Drivetrain Components

• Tools Required: Socket set, torque wrench.
• Sub-steps:
  1. Inspect the axles for any visible wear or damage, including boots and joints.
  2. If any components are worn, replace them accordingly.
  3. Check the differential fluid level and replace if necessary.