# Service bulletin A4524412073483\_1

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.

- Type: Service bulletin
- NHTSA id: 10252469
- Published by NHTSA: 2024\-04\-04
- Manufacturer's number: A4524412073483\_1
- Manufacturer's date: 2024\-03\-28
- NHTSA component: SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:CONTROL UNIT/MODULE; SERVICE BRAKES, HYDRAULIC

## NHTSA's summary

This bulletin provides information when the ABS/ESC control unit cannot be reached "DTC U012100 \- ABS Control module no communication" is stored.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2024/MC-10252469-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-10252469-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Brakes, Anti\-lock brakes

## Trouble codes named

U0121

## Vehicles listed

- 2019 AUDI E\-TRON
- 2021 to 2023 AUDI E\-TRON
- 2022 AUDI E\-TRON SPORTBACK
- 2023 AUDI E\-TRON SPORTBACK
- 2024 AUDI Q8
- 2024 AUDI SQ8

## Recalls for the same vehicles and component

- [21V707000](/recalls/nhtsa/21V707000.md), 2021-09-13: SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP; SERVICE BRAKES, HYDRAULIC

## Other bulletins for the same vehicles and component

- [A4524402072977\_2](/bulletins/10252097.md), 2024-04-04, Service bulletin: ELECTRONIC STABILITY CONTROL \(ESC\):CONTROL MODULE; SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:ABS WARNING LIGHT. This bulletin provides information when the ABS/ESC control unit cannot be reached, DTC U012100, ABS Control Module not communication.
- [A4524392072977\_1](/bulletins/10250553.md), 2024-03-06, Service bulletin: SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:CONTROL UNIT/MODULE; SERVICE BRAKES, AIR:ANTILOCK:CONTROL UNIT/MODULE. This bulletin provides information when the ABS/ESC Control unit cannot be reached; DTC U012100, ABS Control Module no communication is stored.
- [A4523362072304\_1](/bulletins/10247205.md), 2024-01-04, Service bulletin: UNKNOWN OR OTHER; SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:ABS WARNING LIGHT; ELECTRICAL SYSTEM:ADAS:HILL DESCENT ASSIST:SENSOR. This bulletin provides information for when the ABS/ESC speed sensor has an implausible signal.
- [A4623452070679\_1](/bulletins/10238235.md), 2023-07-10, Service bulletin: SERVICE BRAKES, AIR:ANTILOCK. This bulletin provides information for when one or more DC is stored in the ABS control unit related to the parking switch; DTC C100C07 and/or C100C29.
- [A4523332061908\_4](/bulletins/10237390.md), 2023-06-06, Service bulletin: SERVICE BRAKES, AIR:ANTILOCK:CONTROL UNIT/MODULE. This bulletin provides an SVM update for instances when the DTC P060C00 is stored in the electric drive control module, or DTC C051F00 is stored in the ABS control module.

JSON: [/v1/bulletins/10252469](/v1/bulletins/10252469)

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