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Service bulletins for the 2012 Audi S4

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.

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

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Only bulletins with component: 12-volt battery are shown. Show all

Bulletins, newest first
27 13 19 20290102022-05-31. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. Low battery charge: excess current draw location
37 13 09 20287152022-05-02. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; POWER TRAIN:AUTOMATIC TRANSMISSION:INTERNAL:GEARS. After a mechatronics, torque converter, or complete gearbox replacement, the clutches must be adapted to the new component. This requires a gradual move of the clutch linings toward the optimal operating points in the most diverse load conditions. As a result, sporadic driving power disruptions lasting for less than a second or reduced shift comfort are possible over the first 500 miles. This is normal, and these issues will decrease over time. The issues can also occur if the adaptation values of the gearbox were deleted.
A911469 2038824-2017-12-05. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY:CABLES. The following message appears on the MMI display: ?Device or cable type not supported?. The ?Device or cable type not supported? message may be displayed when the wrong AMI cable type is used. See the Service section of this bulletin for an overview of the AMI cables that support iOS devices.
A271319 2029010-2017-10-31. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. Supersedes Technical Service Bulletin Group 27 number 12-13 dated March 22, 2012. The customer may report a discharged battery when trying to start the vehicle. The condition results in a no start.

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