Audi A4 2021–2023 — technical service bulletin
Bulletin A0124072071243_1 · NHTSA communication 10249578 · issued Jan 30, 2024
Technical service bulletin
communication type
Unknown / Other
component
2021–2023
model years
15
vehicle entries
Official summary
This bulletin provides information when whistling noises are heard from the turbocharger at 1500-2200 rpm and approximately 70% load on 4 cyl 2.0 TFSI.
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.