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Service bulletin Bulletin 49A4

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 id10252010
Published by NHTSA2024-04-05
Manufacturer's numberBulletin 49A4
Manufacturer's date2024-03-21
NHTSA componentSERVICE BRAKES, HYDRAULIC; AUTOHOLD BRAKE SYSTEM/BRAKE HOLD:SOFTWARE; SERVICE BRAKES

NHTSA's summary

The operating noises made by the hydraulic unit may be louder than usual and/or brake pedal travel may be higher at very low speeds.

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

Vehicles listed
AUDI E-TRON GT2022, 2023, 2024
AUDI RS E-TRON GT2022, 2023, 2024

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

Recalls for the same vehicles and component
24V4650002024-06-20. SERVICE BRAKES, AIR:SUPPLY:HOSES, LINES/PIPING, AND FITTINGS
20243552024-06-19. Brakes

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
TSB_2077435_32026-09-04. Service bulletin. This bulletin provides information when there are cracks on the friction ring surface on ceramic brake discs.
TSB_2075120_32026-09-04. Service bulletin. This bulletin provides information about the general approach for brake vibration concerns.
TSB_2072304_42026-09-04. Service bulletin. This bulletin provides information when there is an ABS/ESC speed sensor implausible signal.
TSB_2069904_32026-09-04. Service bulletin. This bulletin provides information for all models regarding brake sounds.
TSB_2069078_42026-09-04. Service bulletin. This bulletin provides information on the zirconium insercts in the brake piston (ceramic brakes only).
TSB_2067132_42026-09-04. Service bulletin. This bulletin provides information when there is corrosion on the friction survace of steel brake discs.
TSB_2034143_112026-01-07. Service bulletin. This Repair Authorization requests that technicians contact the Technical Assistance Center before proceeding with any brake repairs on vehicles with Cceramic brakes.
TSB_2077435_22025-11-08. Service bulletin. This bulletin provides information when there are cracks on the friction ring surface on ceramic brake discs.
TSB_2069904_22025-11-08. Service bulletin. This bulletin provides information for all models regarding brake sounds.
TSB_2063679_62025-11-08. Service bulletin. This bulletin provides information when the DTC C1399F0 is stored in the ABS control module.