Service bulletins for the 2003 Volkswagen Jetta
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
233 on file from NHTSA, as of 2026-10-19.
About P0420 on the 2003 Volkswagen Jetta: what the code means, and the bulletins and recalls about the same components.
By type
By component
By trouble code
By topic
Only bulletins with trouble code: P0420 are shown. Show all
| 01 08 14 | 2008-04-24. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). UPDATE PROGRAMMING, MIL ON, DTC'S P0420 AND/OR P0300-P0306 STORED IN ECM FAULT MEMORY. *NJ |
|---|
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.