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Service bulletin Dealer 24HR

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 id10203685
Published by NHTSA2021-12-07
Manufacturer's numberDealer 24HR
Manufacturer's date2021-11-18
NHTSA componentENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE; EQUIPMENT

NHTSA's summary

Update engine control module software

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

Engine, Equipment and accessories, Engine control module

Vehicles listed
AUDI A82020
AUDI A82021

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

Recalls for the same vehicles and component
21V1110002021-02-24. ENGINE; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
A1324232060876_22024-03-06. Service bulletin. This bulletin provides information for when the MIL is illuminated; DTC P030000 is stored in the ECM, and corrosion marks are on the cylinder walls.
A2723602067906_32023-10-05. Service bulletin. This bulletin provides information for when DTC P0A7D00 is stored.
A1923412062951_32023-10-05. Service bulletin. This bulletin provides information for when the red coolant warning lamp is on and the DTCs P218100, P017B00, P017C00, and/or P017E00 are stored in the ECM.
A2723572058831_92023-07-10. Service bulletin. This bulletin provides information for when there is a 48V electrical system warning; DTC P0CA700, U046900 is stored in the starter/generator control module/ECM.
A2023522065287_62023-02-07. Service bulletin. This bulletin provides instructions for when the MIL is on and DTC P044200 and/or P045600 is stored in the ECM.
A2722412058831_42022-04-05. Service bulletin. This bulletin contains a software update for DTC P0CA700 or U046900.
A1922292058767_82022-04-05. Service bulletin. This bulletin contains instructions for DTCs P218100, P017B00, P308100, and P01E400.
A2022402065287_22022-02-04. Service bulletin. This bulletin describes the repair procedure to address an internal defect in the EVAP leak detection pump causing false leak detection.
A2021392065287_12022-01-05. Service bulletin. There is an internal defect in the EVAP leak detection pump causing false leak detection.
A9021062061489_32021-07-02. Service bulletin. This bulletin states to create a PSS record if the driver assistance systems are sporadically not working.