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Service bulletin A401337 2035854-

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10121406
Published by NHTSA2017-10-31
Manufacturer's numberA401337 2035854-
Manufacturer's date2013-12-03
NHTSA componentSERVICE BRAKES, HYDRAULIC; SUSPENSION

NHTSA's 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.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Brakes, Suspension

Vehicles listed
AUDI A42009, 2010
AUDI A4 ALLROAD2013, 2014
AUDI A4 AVANT2011 to 2012
AUDI A52008, 2009, 2010, 2011, 2012, 2013
AUDI A5 CABRIOLET2010 to 2014
AUDI Q52009, 2010, 2011, 2012, 2013, 2014

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
TSB_2075120_32026-09-04. Service bulletin. This bulletin provides information about the general approach for brake vibration concerns.
TSB_2072304_42026-09-04. Service bulletin. This bulletin provides information when there is an ABS/ESC speed sensor implausible signal.
TSB_2069904_32026-09-04. Service bulletin. This bulletin provides information for all models regarding brake sounds.
TSB_2069078_42026-09-04. Service bulletin. This bulletin provides information on the zirconium insercts in the brake piston (ceramic brakes only).
TSB_2023187_82026-04-07. Service bulletin. This bulletin provides informaiotn regarding squeaking noises when steering or maneuvering.
TSB_2069904_22025-11-08. Service bulletin. This bulletin provides information for all models regarding brake sounds.
TSB_2075120_22025-11-08. Service bulletin. This bulletin provides information regarding the general approach for all Audi vehicles regarding brake vibrations.
TSB_2072304_32025-11-08. Service bulletin. This bulletin provides information when there is an ABS/ESC speed sensor implausible signal.
TSB_2069078_32025-11-08. Service bulletin. This bulletin provides information on the zirconium insercts in the brake piston (ceramic brakes only).
A3725312074822_22025-02-05. Service bulletin. This bulletin provides information when noises from wheel input shaft/drive shaft are reported.