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Audi TSB #A401337 2035854-
2014 Audi A4
TSB Document:
Affected 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.
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