Volkswagen Touareg 2015–2017 — technical service bulletin
Bulletin Dealer 23DG · NHTSA communication 10201475 · issued Sep 7, 2021
Technical service bulletin
communication type
Engine and Engine Cooling
component
2015–2017
model years
3
vehicle entries
Official summary
If the drain valve in the engine air intake hose becomes clogged with debris, it is possible that water may potentially enter the air intake system and affect the air filter, engine, turbocharger or intercooler in limited instances.
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.