Why does a BMW make a clunking noise when turning the steering wheel in place?
2 Answers
BMW making a clunking noise when turning the steering wheel in place could be due to the following reasons: 1. Noise from the shock absorber top mount bearing: If the clunking noise occurs when gently shaking the steering wheel in place, it is likely caused by insufficient lubrication in the shock absorber's top mount bearing. Applying some grease to the top mount bearing may solve the issue. If the noise persists after greasing, replacement is necessary. 2. Noise from the stabilizer bar: If the noise is not coming from the shock absorber, check if the stabilizer bar bushings are loose or damaged. Loose or damaged stabilizer bar bushings can cause noise not only when turning the steering wheel but also when driving on uneven roads. Loose bushings can be fixed by adding shims, but damaged ones must be replaced.
I've been running an auto repair shop for over a decade, and that clunking sound when turning BMWs on the spot is extremely common. Most cases involve worn or loose tie rod ends where the grease has dried up, causing direct metal-to-metal friction. Another culprit is aged or cracked strut mounts that squeak when the steering wheel turns. For vehicles with power steering, you need to check if the fluid level is adequate - a faulty pump could also cause noises. Worn control arm bushings are more troublesome, not only creating noises but affecting handling too. I remember fixing a 5 Series last time where the owner ignored it for six months, resulting in complete steering gear seal failure and oil leakage. Such abnormal sounds should be inspected early - the most straightforward method is removing wheels to check which bushings are cracked. Don't wait until the steering completely seizes up before getting it repaired.
