Audi A6 2003 — technical service bulletin
Bulletin LZ · NHTSA communication 10006054 · issued Feb 1, 2004
Technical service bulletin
communication type
Engine and Engine Cooling
component
2003
model years
1
vehicle entries
Official summary
The oxygen sensor in the exhaust system could fail, potentially causing a vehicle to exceed federal and/or california emissions standards, or to experience increased fuel consumption. If the oxygen sensor fails, the vehicle's check engine light on the dashboard will illuminate. Revised letter to audi dealer and audi emissions recall circular to reprogram the engine control module (ecm) and/or replace one or two oxygen sensors. *tt
Vehicles covered
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.