my BMW 5 Series makes a grinding noise when turning what could it be

Solution

1. Preparation

• Gather tools and safety equipment: gloves, safety glasses, jack, jack stands, socket set, and torque wrench.
• Park the vehicle on a flat surface and engage the parking brake.

2. Inspect and Replace Power Steering Fluid

• Sub-steps:
  1. Open the hood and locate the power steering reservoir.
  2. Remove the cap and check the fluid level against the dipstick.
  3. If low, add the recommended power steering fluid (e.g., ATF or specific BMW fluid).
  4. If the fluid is dirty or contaminated, drain and replace it.
• Tools Required: Funnel, fluid container for old fluid.

3. Check and Replace Steering Components

• Sub-steps:
  1. Lift the front of the vehicle and secure it with jack stands.
  2. Visually inspect tie rods and ball joints for wear.
  3. If damaged, remove the nuts securing the affected components using a socket set.
  4. Replace with new parts and torque to specification (refer to OEM specifications).
• Tools Required: Socket set, torque wrench.

4. Inspect and Replace Wheel Bearings

• Sub-steps:
  1. Remove the wheel to access the hub assembly.
  2. Check for play in the wheel by shaking it side to side.
  3. If excessive play is detected, remove the hub assembly and replace the bearing.
  4. Reassemble and torque the wheel to specification.
• Tools Required: Socket set, bearing puller, torque wrench.

5. Inspect and Replace CV Joints

• Sub-steps:
  1. Inspect the CV joint boots for tears or grease leakage.
  2. If damaged, remove the axle from the vehicle.
  3. Replace the CV joint or axle as necessary and reinstall.
  4. Torque the axle nut to manufacturer specifications.
• Tools Required: Socket set, CV joint puller.