Volkswagen ID.4 2021–2023 — technical service bulletin
Bulletin TT 87 23 01 · NHTSA communication 10232744 · issued Mar 2, 2023
Technical service bulletin
communication type
Engine and Engine Cooling
component
2021–2023
model years
3
vehicle entries
Official summary
Correct connection on evaporator case drain hose.
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.