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Service bulletin A421216 2021724-

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 id10122857
Published by NHTSA2017-11-08
Manufacturer's numberA421216 2021724-
Manufacturer's date2012-11-13
NHTSA componentSTEERING; EQUIPMENT; SUSPENSION

NHTSA's summary

Supersedes Technical Service Bulletin Group 40 number 12-24 dated June 6, 2012. Loud cracking or rubbing noises when turning steering wheel. Steering is not affected and will operate normally. Prior to performing this TSB, check whether the vehicle is equipped with rubber shock absorber stop and the plastic cap on the shock. Vehicles equipped with the Audi magnetic ride suspension may not be equipped with these components and this TSB will not be applicable to such vehicles. While steering, the shock absorber stop can chafe on the plastic cap of the suspension strut. If the vehicle is lifted up, the noise disappears. The boot is not properly secured / installed, or is deformed.

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

Equipment and accessories, Steering, Suspension

Vehicles listed
AUDI A32006, 2007, 2008, 2009, 2010, 2011
AUDI TT2008, 2009, 2010
AUDI TT ROADSTER2011

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_2074846_52026-10-05. Service bulletin. This bulletin provides information about vibrations and rotational steering vibrations.
TSB_2023187_82026-04-07. Service bulletin. This bulletin provides informaiotn regarding squeaking noises when steering or maneuvering.
TSB_2074846_42026-02-06. Service bulletin. This bulletin provides information about vibrations and rotational steering vibrations.
TSB_2074846_32025-11-08. Service bulletin. This TSB provides information regarding rotational and other steerihng wheel vibrations.
A3725312074822_22025-02-05. Service bulletin. This bulletin provides information when noises from wheel input shaft/drive shaft are reported.
A4424082074846_22024-10-28. Service bulletin. This bulletin provides information when there are vibrations and rotational steering wheel vibrations.
A0024842073507_12024-04-04. Service bulletin. This bulletin provides instructions on evaluating TDI vehicles for repurchase prior to repairs.
A9124632044694_32024-03-06. Service bulletin. This bulletin provides information pertaining to MMI Navigation database concerns.
441344202256382024-03-04. Service bulletin. Steering wheel shimmy, vibration and/or oscillation
441342202256372024-03-04. Service bulletin. Steering wheel shimmy, vibration and/or oscillation