The customer reports hearing a rattling or knocking noise when the car is driven over bumps or uneven road...
Audi technical service bulletin A401337 2035854- for 2009-2010 Audi A4, 2009-2014 Audi Q5 and 2008-2013 Audi A5 and others.
- Bulletin number
- A401337 2035854-
- Component
- Service brakes, hydraulic
- Summary
- The customer reports hearing a rattling or knocking noise when the car is driven over bumps or uneven road surfaces. The noise is noticed after the car has been driven for a while and is warmed-up, and when the temperature outside is warm. The condition can be duplicated if the brakes are applied while the car is driven over bumps. High ambient temperatures at the hydraulic guide links cause the noise.
Owners of these vehicles have filed 27 complaints in the brakes category.
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