1. Faulty CV Joint (Constant Velocity Joint):
- The CV joint is a critical component that allows the wheels to turn smoothly at varying angles.
- If the CV joint is worn or damaged, it may produce a clicking or knocking sound, especially during left turns when the joint is under more strain.
2. Worn Ball Joints:
- Ball joints connect the suspension system to the wheels and allow for smooth movement.
- Worn-out ball joints can create a knocking or clunking noise when turning, especially at low speeds.
3. Loose or Damaged Steering Components:
- Issues with steering components, such as the tie rods, control arms, or rack and pinion, can also lead to knocking sounds when turning the wheel.
- Loose or damaged components can cause the wheels to move with excessive play, resulting in a knocking or banging noise.
4. Wheel Bearing Problems:
- Worn or damaged wheel bearings can produce a humming or growling noise that worsens when making turns.
- If the sound gets louder or changes in intensity as you turn the steering wheel, wheel bearings could be the culprit.
5. Transmission or Differential Issues:
- Rarely, transmission or differential problems, such as worn gears or low fluid levels, can also manifest as a knocking sound during turns.
To determine the exact cause of the knocking sound, it's advisable to have your BMW 330ci inspected by a qualified mechanic or technician who can accurately diagnose and fix the issue. They can examine the vehicle, pinpoint the source of the sound, and recommend the appropriate repairs.
