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Service bulletin A901781 2048009-

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 id10127943
Published by NHTSA2018-02-05
Manufacturer's numberA901781 2048009-
Manufacturer's date2017-08-25
NHTSA componentELECTRICAL SYSTEM:SOFTWARE; PARKING BRAKE

NHTSA's summary

This bulletin contains software update instructions for when there is a Parking Brake message (no functional issue) without any DTC's logged.

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

Brakes, Electrical system, Parking brake, Software

Vehicles listed
AUDI A3 CABRIOLET2017
AUDI A4 ALLROAD2017
AUDI A52017
AUDI Q52018
AUDI Q72017
AUDI R8 SPYDER2017
AUDI TT ROADSTER2017

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

Recalls for the same vehicles and component
16V6420002016-09-06. ELECTRICAL SYSTEM:SOFTWARE; EXTERIOR LIGHTING

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
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.
A9023582072005_22024-01-04. Service bulletin. This bulletin provides information for when the error message "CBR1021E: Can't parse Request. (cpngw)" appears when adapting control units, keys, or immobilizer; DTC B201700.
A5723062055932_92023-06-06. Service bulletin. This bulletin provides information for when the central locking/parking brake warning, or alarm sounds, or if there are exterior mirror issues. DTCs B122D29, U122800, and/or B14FF29 may be stored.
A9023062048009_52023-03-06. Service bulletin. This bulletin provides instructions for a software update in instances where a customer reports a that the message "Parking brake: malfunction! Safely turn off the vehicle, See owner's manual" is shown. The concern cannot be duplicated, and no DTCs are stored.
A4622332051095_72022-07-01. Service bulletin. This informational bulletin contains instructions on how to download and use the Audi Frequency App.
DC_91CD_Train2022-03-04. Service bulletin. 3G Turndown (91CD) Dealer Training
Dealer 91CD2022-02-04. Service bulletin. AT&T has announced its plan to discontinue its 3G network in the U.S. starting in February 2022. This will impact the Audi connect services in certain 2017-2019 model year Audi vehicles.
A0021552011732122022-01-05. Service bulletin. This bulletin contains general instructions for software updates.
A9621712051239_22021-08-04. Service bulletin. This bulletin contain instructions for addressing issues with the garage door remote and HomeLink.
A9121072060681_32021-07-02. Service bulletin. This bulletin contains instructions to update eligible cars from Google Earth to the new service provided by HERE.