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Service bulletins for the 2018 Audi A3

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.

640 on file from NHTSA, as of 2026-10-19.

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Only bulletins with component: Transmission control module are shown. Show all

Bulletins, newest first
Dealer 34L4 Rev22024-01-04. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). Transmission Control Module (TCM) Software - Updated parts and claiming information
Circular34L4Rev22024-01-04. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). Transmission Control Module (TCM) Software - Updated parts and claiming information
Dealer34L4_REV12023-12-07. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). 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. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). 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. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). 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. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); POWER TRAIN. Dealer Letter to announce Repair Available - Service Action 34L4 / TCM Software
Circular 34L42023-09-01. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ELECTRICAL SYSTEM; POWER TRAIN. 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. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); POWER TRAIN. This bulletin provides information for when Gearbox Malfunction Warning, DTC P0C2900, P176F00, P176E00 or P175E00 stored in the TCM.
A3720002060146_12020-08-06. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE; ENGINE. This bulletin contains a software update that addresses a brief but sudden increase in engine speed without DTCs or leaks.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.