my BMW 3 Series G20/G21 (2019-2024) power steering is making noise, what should I check?

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is off.
• Tools Required: Socket set, screwdrivers, fluid siphon, OBD-II scanner.

2. Check and Refill Power Steering Fluid

• Locate the power steering fluid reservoir.
• Remove the cap and check the fluid level. If low, add the appropriate type of power steering fluid (check the owner’s manual for specifications).
• If the fluid is dark or contaminated, proceed to flush the system.

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

• Disconnect the negative battery terminal for safety.
• Remove the drive belt from the power steering pump by loosening the tensioner pulley.
• Disconnect the power steering pump hoses (be prepared for fluid spillage).
• Unbolt the power steering pump from its bracket and remove it.
• Install the new power steering pump by reversing the removal steps and ensure all connections are tight.

4. Bleed Power Steering System

• Refill the power steering fluid reservoir to the recommended level.
• Start the engine and turn the steering wheel from lock to lock several times to bleed air from the system.
• Check fluid levels during this process and add fluid as necessary.

5. Recheck and Test

• Reconnect the negative battery terminal.
• Take the vehicle for a test drive to verify if the noise has ceased and the steering operates smoothly.