Audi TT 2000 — technical service bulletin
Bulletin 0001 · NHTSA communication 616762 · issued Dec 8, 2000
Technical service bulletin
communication type
Engine and Engine Cooling
component
2000
model years
1
vehicle entries
Official summary
Experiencing groaning or howling noise from engine compartment when accelerating during partial load between 2500 - 3000 rpm and / or noisy charge pressure bypass valve when decelerating between 2000 - 3000 rpm. *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.