Service bulletin 0405

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)
Type	Service bulletin
NHTSA id	10011913
Published by NHTSA	2005-02-04
Manufacturer's number	0405
Manufacturer's date	2004-12-09
NHTSA component	ENGINE AND ENGINE COOLING

NHTSA's summary

OIL FILTER CAP, INTERFERENCE WITH GENERATOR (GEN) COOLANT PIPE. AUDI A8L 2005 ALSO INCLUDED. *TT

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Engine

Vehicles listed
AUDI A8	2004

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

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A191562 2025303-	2017-11-17. Service bulletin. Supersedes Technical Service Bulletin Group 19 number 15-61 dated July 7, 2015. Discontinuation and mixing of Audi-approved engine coolants. G11, G12, and G12+ coolants have been replaced by an improved version. G12++ coolant (for service available) has been introduced in MY 2005 for all engines. G13 has been introduced in MY 2008 as factory filling and service.
A191341 2025303-	2017-11-17. Service bulletin. Supersedes Technical Service Bulletin Group 19 number 13-35 dated March 25, 2013. Discontinuation and mixing of Audi-approved engine coolants. G11, G12, and G12+ coolants have been replaced by an improved version. G12++ coolant (for service available) has been introduced in MY 2005 for all engines. G13 has been introduced in MY 2008 as factory filling and service.
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