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Service bulletin Dealer 34L4 Rev2

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 id10247508
Published by NHTSA2024-01-04
Manufacturer's numberDealer 34L4 Rev2
Manufacturer's date2023-12-14
NHTSA componentELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)

NHTSA's summary

Transmission Control Module (TCM) Software - Updated parts and claiming information

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, Transmission and driveline, Automatic transmission, Software, Transmission control module

Vehicles listed
AUDI A32017, 2018
AUDI S32018

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

Other bulletins for the same vehicles and component
A0023822047812_72024-01-04. Service bulletin. This bulletin provides information on how to set up and use the SD Creator for obtaining vehicle software updates via the Mirror Server.
Circular34L4Rev22024-01-04. Service bulletin. Transmission Control Module (TCM) Software - Updated parts and claiming information
Dealer34L4_REV12023-12-07. Service bulletin. Transmission Control Module (TCM) Software - Updated repair steps after software update is completed. Added example photos of transmission damage.
Circ34L4_REV12023-12-07. Service bulletin. Transmission Control Module (TCM) Software - Updated repair steps after software update is completed. Added example photos of transmission damage.
A3523442070217_12023-10-05. Service bulletin. This bulletin provides information for when the Gearbox warning comes on, and various DTC memory entries are stored in the TCM.
Dealer 34L42023-09-01. Service bulletin. Dealer Letter to announce Repair Available - Service Action 34L4 / TCM Software
Circular 34L42023-09-01. Service bulletin. Audi is providing updated transmission control module (TCM) software to enhance an in-vehicle alert should a problem arise within the auxiliary hydraulic pump. Additionally, if a specific fault is found after the software is updated, a repair will be made to the transmission.
A3523432050723_32023-09-01. Service bulletin. This bulletin provides information for when Gearbox Malfunction Warning, DTC P0C2900, P176F00, P176E00 or P175E00 stored in the TCM.
A4622332051095_72022-07-01. Service bulletin. This informational bulletin contains instructions on how to download and use the Audi Frequency App.
A9622772059201_52022-05-05. Service bulletin. This bulletin contains information for when the messages appear in the instrument cluster about the high beam assist and/or traffic sign detection with DTC C12B3FD.