Audi A5 2025–2026 — technical service bulletin
Bulletin TSB_2078871_2 · NHTSA communication 11028470 · issued Jan 30, 2026
Technical service bulletin
communication type
Engine
component
2025–2026
model years
13
vehicle entries
Official summary
This bulletin provides information when the engine warning lamp (MIL) is on - DTC U041800.
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.