Audi A4 2008–2009 — technical service bulletin
Bulletin TSB-94-09-31 · NHTSA communication 10033334 · issued Oct 6, 2009
Technical service bulletin
communication type
Exterior Lighting
component
2008–2009
model years
4
vehicle entries
Official summary
Audi: xenon headlight flickers or is inoperative on one side (dtc 00978 or 00979). Xenon on one side flickers or is inoperative intermittently or permanently); xenon bulbs were manufactured by philips; dtc 00979 (right low beam headlight m31 electrical fault in circuit); dtc 00978 (left low beam headlight m29 electrical fault in circuit). *pe
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.