# Service bulletin A4821122064018\_3

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: 10203475
- Published by NHTSA: 2021\-12\-07
- Manufacturer's number: A4821122064018\_3
- Manufacturer's date: 2021\-11\-04
- NHTSA component: EXTERIOR LIGHTING:HAZARD FLASHING WARNING LIGHTS:UNIT

## NHTSA's summary

This bulletin contains a software update to address a red steering warning light with DTC C10AC07 stored.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10203475-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10203475-9999.pdf)

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

## Components

Lighting

## Trouble codes named

C10AC

## Vehicles listed

- 2019 to 2021 AUDI A6
- 2020 to 2021 AUDI A6 ALLROAD
- 2019 to 2021 AUDI A7
- 2021 AUDI A7 E
- 2019 to 2020 AUDI A8
- 2021 AUDI A8
- AUDI AUDI
- 2019 to 2021 AUDI Q5
- 2020 to 2021 AUDI Q5 PHEV
- 2019 to 2021 AUDI Q7
- 2019 to 2021 AUDI Q8
- 2021 AUDI RS 6 AVANT
- 2021 AUDI RS 7
- 2020 to 2021 AUDI RS Q8
- 2020 AUDI RS6
- 2020 AUDI RS7
- 2020 to 2021 AUDI S6
- 2020 to 2021 AUDI S7
- 2019 to 2021 AUDI SQ5
- 2020 to 2021 AUDI SQ7
- 2020 to 2021 AUDI SQ8

## Recalls for the same vehicles and component

- [2025167](/recalls/tc/2025167.md), 2025-03-31: Lights And Instruments

## Other bulletins for the same vehicles and component

- [SM 52\-2024](/bulletins/11009310.md), 2024-10-26, Other: EXTERIOR LIGHTING. This special notice is to inform dealers to return the parts listed if it meets the criteria provided.
- [SM 52\-2024](/bulletins/11009295.md), 2024-10-26, Other: EXTERIOR LIGHTING. This special notice is to inform dealers to return the parts listed if it meets the criteria provided.
- [SM 52\-2024](/bulletins/11009280.md), 2024-10-26, Other: EXTERIOR LIGHTING. This special notice is to inform dealers to return the parts listed if it meets the criteria provided.
- [SM 52\-2024](/bulletins/11009265.md), 2024-10-26, Other: EXTERIOR LIGHTING. This special notice is to inform dealers to return the parts listed if it meets the criteria provided.
- [SM 52\-2024](/bulletins/11009250.md), 2024-10-26, Other: EXTERIOR LIGHTING. This special notice is to inform dealers to return the parts listed if it meets the criteria provided.
- [SM 52\-2024](/bulletins/11009235.md), 2024-10-26, Other: EXTERIOR LIGHTING. This special notice is to inform dealers to return the parts listed if it meets the criteria provided.
- [SM 52\-2024](/bulletins/11009220.md), 2024-10-26, Other: EXTERIOR LIGHTING. This special notice is to inform dealers to return the parts listed if it meets the criteria provided.
- [A9424792063739\_2](/bulletins/10254078.md), 2024-05-07, Service bulletin: EXTERIOR LIGHTING. This bulletin provides information when the headlights do not turn off during daylight hours.
- [A9424782070694\_2](/bulletins/10254077.md), 2024-05-07, Service bulletin: EXTERIOR LIGHTING. This bulletin provides information when there is a functional issue with the lights in the rear lid; B146C29.
- [A942473201274917](/bulletins/10251666.md), 2024-04-05, Service bulletin: EXTERIOR LIGHTING; UNKNOWN OR OTHER. This bulletin provides information when the exterior lights have moisture accumulation.

JSON: [/v1/bulletins/10203475](/v1/bulletins/10203475)

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