Audi A4 2008–2014 — technical service bulletin
Bulletin A401337 2035854- · NHTSA communication 10121406 · issued Dec 3, 2013
Technical service bulletin
communication type
Suspension
component
2008–2014
model years
23
vehicle entries
Official 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.
Vehicles covered
- 2009 Audi A4
- 2010 Audi A4
- 2013 Audi A4 Allroad
- 2014 Audi A4 Allroad
- 2011 Audi A4 Avant
- 2012 Audi A4 Avant
- 2008 Audi A5
- 2009 Audi A5
- 2010 Audi A5
- 2011 Audi A5
- 2012 Audi A5
- 2013 Audi A5
- 2010 Audi A5 Cabriolet
- 2011 Audi A5 Cabriolet
- 2012 Audi A5 Cabriolet
- 2013 Audi A5 Cabriolet
- 2014 Audi A5 Cabriolet
- 2009 Audi Q5
- 2010 Audi Q5
- 2011 Audi Q5
- 2012 Audi Q5
- 2013 Audi Q5
- 2014 Audi Q5
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.