Volkswagen Touareg 2007–2009 — technical service bulletin
Bulletin TB011420 · NHTSA communication 10241323 · issued Sep 10, 2014
Technical service bulletin
communication type
Engine and Engine Cooling
component
2007–2009
model years
3
vehicle entries
Official summary
Update Programming, MIL ON, DTCs P0420, P0430 Stored in ECM Fault Memory
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.