Audi A4 2021–2023 — technical service bulletin
Bulletin A0124142071243_2 · NHTSA communication 10251968 · issued Mar 20, 2024
Technical service bulletin
communication type
Engine and Engine Cooling
component
2021–2023
model years
15
vehicle entries
Official summary
This bulletin provides information when there are whistling noises from the turbo charger at 1500 - 2200 RPM, and approximately 70% load.
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.