why does my BMW 3 Series G20/G21 (2019-2024) lose power steering assist

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is on a level surface and secure it with wheel chocks.
• Disconnect the battery to avoid electrical issues while working on the power steering system.

2. Inspect and Replace Power Steering Fluid

• Sub-steps:

  1. Remove the power steering fluid reservoir cap.
  2. If the fluid is low, top it up with the manufacturer-recommended fluid type.
  3. If the fluid is dirty or contaminated, consider flushing the system (see below for flush instructions).

• Tools Required: Power steering fluid, funnel.

3. Inspect and Replace Power Steering Pump (if faulty)

• Sub-steps:

  1. Remove the drive belt from the power steering pump by loosening the tensioner.
  2. Disconnect the power steering lines from the pump using a wrench; be prepared for fluid spillage.
  3. Remove the mounting bolts securing the power steering pump and take out the pump.
  4. Install the new power steering pump and secure it with the mounting bolts.
  5. Reattach the power steering lines, ensuring tight connections.
  6. Reinstall the drive belt and adjust tension as necessary.

• Tools Required: Socket set, wrench set, belt tensioner tool (if applicable).

4. Electrical System Check (if applicable)

• Sub-steps:

  1. Inspect the wiring harness and connectors for damage or corrosion.
  2. Use a multimeter to test the voltage at the power steering motor or pump.
  3. Replace any damaged wiring or connectors found during the inspection.

• Tools Required: Multimeter, electrical connectors (if replacement is needed).