What causes the friction noise when turning the steering wheel of an A6L?
2 Answers
The reason for the friction noise when turning the steering wheel of an A6L could be excessive clearance caused by wear of the steering gear's mating gears. Replacing the steering gear should resolve the issue. Avoid forcing the steering wheel: It is recommended that drivers avoid frequently forcing the steering wheel while driving, as this not only damages the steering wheel but also affects the vehicle's parking and control systems. Drivers should be mindful of this. Do not turn the steering wheel to its limit when making turns: This can help protect the steering wheel to some extent. Additionally, drivers should regularly check the tie rods to effectively reduce minor issues such as steering wheel vibration. If a specific habit has already been formed, it is acceptable to follow the driver's usual practice as long as it does not harm the vehicle.
My A6L started making a steering wheel friction noise in its second year, a creaking sound like crumpling plastic wrap. During troubleshooting, I first felt the steering column dust cover by hand and found the rubber sleeve had cracked and hardened. The mechanic said this car's steering column has a common design flaw where the dust cover easily dries out and grinds without grease. Later, I discovered floor mats can also be hidden culprits - improper installation after car washing once caused the rubber edge to jam against the steering shaft, producing squeaks. The most troublesome issue was aging steering gear seals causing oil leakage, resulting in direct metal-to-metal friction that sounded like sandpaper grinding a metal pipe. I recommend listening for it most clearly during cold mornings - if there's a dampened rustling noise, it's likely the clock spring problem. Don't randomly disassemble the airbag module yourself; I learned this lesson the hard way.
