# Service bulletin A001458 2026692\-

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.

- Type: Service bulletin
- NHTSA id: 10122171
- Published by NHTSA: 2017\-11\-08
- Manufacturer's number: A001458 2026692\-
- Manufacturer's date: 2014\-01\-31
- NHTSA component: POWER TRAIN:AUTOMATIC TRANSMISSION; ENGINE

## NHTSA's summary

Supersedes Technical Service Bulletin Group 00 number 12\-43 dated December 21, 2012. If a 2012 \- 2015 Audi A8 L W12 arrives at an Audi dealership and requires diagnosis or repair, a Repair Authorization must be obtained. Prior to any repair, a Technical Assistance Center \(TAC\) ticket must be created for engine and transmission concerns only. Routine maintenance and PDI do not require prior authorization or a Technical Assistance Center \(TAC\) ticket. These procedures are mandatory until further notice. Warranty repairs without repair authorization via a TAC contact will not be reimbursed.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2014/MC-10122171-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2014/MC-10122171-0001.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine, Transmission and driveline, Automatic transmission

## Vehicles listed

- 2011 to 2014 AUDI A8

## Other bulletins for the same vehicles and component

- [3712692031140](/bulletins/10250455.md), 2024-02-20, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). Warning message in cluster, no driving mode can be selected \- Faults P09140, U040400, U010300 stored in TCM
- [371422202898511](/bulletins/10226521.md), 2022-11-21, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); LANE DEPARTURE; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. Transmission warning message in cluster \(P074100 stored in TCM\)
- [37142020362781](/bulletins/10226519.md), 2022-11-21, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\); POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); UNKNOWN OR OTHER. Rough downshifts when vehicle is slowed to a stop.
- [37139920290276](/bulletins/10226518.md), 2022-11-21, Service bulletin: LANE DEPARTURE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). Transmission warning message in cluster.
- [37139720289859](/bulletins/10226516.md), 2022-11-21, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE; ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. Transmission warning message in cluster, P074100 stored in TCM
- [37139620293059](/bulletins/10226515.md), 2022-11-21, Service bulletin: UNKNOWN OR OTHER; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE; ELECTRICAL SYSTEM:12V/24V/48V BATTERY. Harsh downshifts when braking or harsh 1\-2 upshift under acceleration
- [37138420293057](/bulletins/10226514.md), 2022-11-21, Service bulletin: UNKNOWN OR OTHER; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE. Harsh downshifts when braking or harsh 1\-2 upshift under acceleration
- [37138220285614](/bulletins/10226512.md), 2022-11-21, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\). Gearbox warning light on \- Faults P0605 and/or P17EC stored in Selector lever module 81
- [37138020289856](/bulletins/10226510.md), 2022-11-21, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:TORQUE CONVERTER; LANE DEPARTURE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE. Transmission warning message in cluster, P074100 stored in TCM
- [37137920293056](/bulletins/10226509.md), 2022-11-21, Service bulletin: UNKNOWN OR OTHER; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE. Harsh downshifts when braking or harsh 1\-2 upshift under acceleration

JSON: [/v1/bulletins/10122171](/v1/bulletins/10122171)

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