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Service bulletin TT661101

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10239794
Published by NHTSA2023-07-31
Manufacturer's numberTT661101
Manufacturer's date2013-04-26
NHTSA componentELECTRICAL SYSTEM; TRAILER HITCHES; ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL; ELECTRICAL SYSTEM:WIRING

NHTSA's summary

After installing the -J345- trailer recognition control module (vehicles with PR code 1D8 only), wiring harness and plug, the following steps need to be performed in order to enable the system.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system, Trailer hitch, Wiring and fuses

Vehicles listed
VOLKSWAGEN TOUAREG2003
VOLKSWAGEN TOUAREG2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
03V2660002003-07-25. ELECTRICAL SYSTEM:WIRING

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
Edition652023-10-16. Service bulletin. Volkswagen Elsa Newsletter
TB97Z52023-09-05. Service bulletin. Engine Wiring Spacer Ring (NVLW)
UPDATE97Z52023-08-14. Service bulletin. Possible chafing of engine pre-wiring harness
TT7212012023-07-31. Service bulletin. After replacement of the Driver seat control module (J810) the vehicle may not recognize the new module. The adaptation test plan may not set the seat module location properly and it may display as a passenger seat control module.
TT5513012023-07-10. Service bulletin. If the rear lid handle is replaced with part number 1J0 827 566L, the microswitch from the original handle must be transferred to the new handle. If original microswitch is not available, microswitch part number 1J5 962 104 B should be ordered and installed.
V971201 20311042019-04-01. Service bulletin. Technical Bulletin (Diagnostic Connector - No ECM Communication): Some model year 2003 ? 2004 V6 Touareg?s may exhibit a loss of communication through the OBD diagnostic connector. The signal ground wire may be missing from pin 5 of the diagnostic connector. This document informs how to diagnose, and service this issue.
V261604 20411102018-01-08. Service bulletin. Update model year 2015 and 2016 Touareg and include VIN ranges.
TT 55-13-012017-12-14. Service bulletin. Tech Tips (Rear Lid Does Not Open After Handle Replacement): If the rear lid handle is replaced with part number 1J0 827 566L, the microswitch from the original handle must be transferred to the new handle. If original microswitch is not available, microswitch part number 1J5 962 104 B should be ordered and installed.
TB-97-09-022009-09-25. Service bulletin. VOLKSWAGEN: THE WIRING HARNESS LOCATED ON THE DRIVER'S SIDE FLOOR PAN NEAR THE A PILLAR MAY HAVE A CORRODED SPLICE(S) CONNECTION. LOCATE SPLICE TO DETERMINE POSSIBLE CORROSION. REPAIR WIRING AS PER REPAIR MANUAL. *PE
97-08-032008-09-17. Service bulletin. VOLKSWAGEN: TRAILER LIGHT FUSE CHANGE: FUSE FOR TRAILER TOWING LIGHTS MAY CONTINUE TO OPEN AFTER REPLACEMENT. DOES NOT AFFECT NORMAL VEHICLE LIGHTING. *PE