# Service bulletin 21A4S4TECHREP

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: 10194403
- Published by NHTSA: 2021\-06\-02
- Manufacturer's number: 21A4S4TECHREP
- Manufacturer's date: 2021\-05\-26
- NHTSA component: EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL

## NHTSA's summary

Settings Section Split "Verify and Set language \& Vehicle Measurements" into two separate checklist items. Post\-Road Test Inspection Section: Added "See TSB 2061028" to the end of The vehicle must not be delivered to the customer if the emergency call function has not been successfully activated \(LED lights up in green\).

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10194403-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10194403-9999.pdf)

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

## Components

Equipment and accessories, Labels and manuals

## Vehicles listed

- 2021 AUDI A4
- 2021 AUDI ALLROAD
- 2021 AUDI S4

## Other bulletins for the same vehicles and component

- [A9124992073629\_1](/bulletins/10253289.md), 2024-05-07, Service bulletin: EQUIPMENT:ELECTRICAL:INFOTAINMENT:SOFTWARE; EQUIPMENT:ELECTRICAL:INFOTAINMENT. This bulletin provides information when the Apple CarPlay connection is dropped repeatedly in short intervals.
- [SM 19\-2024](/bulletins/10252019.md), 2024-04-05, Service bulletin: EQUIPMENT. This special notice is to inform dealers to return the parts listed if it meets the criteria provided.
- [AVIN4PIN20240305](/bulletins/10251506.md), 2024-04-05, Service bulletin: EQUIPMENT:ELECTRICAL; UNKNOWN OR OTHER; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:ENGINE COOLANT HOSES AND FITTINGS; STRUCTURE:BODY:DOOR. Noise from front door trim panel while driving Low coolant warning in cluster, coolant level is correct Front window inoperative Air suspension warning \- DTC P089200 charge handle doesn't release vehicle will not charge Temp sensor DTC P218500 Corrosion on wheelhouse cover plate P008700 \- low fuel pressure P042000: Catalyst System, Bank1 Efficiency Below
- [A9124892069112\_5](/bulletins/10252581.md), 2024-04-04, Service bulletin: EQUIPMENT; ELECTRICAL SYSTEM. This bulletin provides information on various improvements for MIB 3.
- [A9124772073135\_1](/bulletins/10250812.md), 2024-03-06, Service bulletin: EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. This Pending Service Solution \(PSS\) requests that a record be added to the PSS database in instances where the radio favorites are lost, shortcuts are greyed out on lower screen with MIB3 vehicles.
- [A9124762073134\_1](/bulletins/10250809.md), 2024-03-06, Service bulletin: EQUIPMENT:ELECTRICAL. This Pending Service Solution \(PSS\) requests that technicians create a record in the PSS database in instances where the star button function assignment is lost on the multifunction steering wheel is lost sporadically.
- [A9124622072901\_1](/bulletins/10250337.md), 2024-03-06, Service bulletin: EQUIPMENT:ELECTRICAL:INFOTAINMENT. This bulletin provides information when the wireless connection for the Audi Smartphone Interface drops out in specific areas.
- [A9124682072959\_1](/bulletins/10250336.md), 2024-03-06, Service bulletin: EQUIPMENT:ELECTRICAL:INFOTAINMENT. This bulletin provides information for when Apple CarPlay pops up or takes over audio without user intervention in vehicles with the Audi Smartphone Interface.
- [A9124662071056\_3](/bulletins/10250334.md), 2024-03-06, Service bulletin: EQUIPMENT:ELECTRICAL:INFOTAINMENT:SOFTWARE; EQUIPMENT:ELECTRICAL:INFOTAINMENT. This bulletin provides information for when Outlook contacts are not accessible via the MMI with Apple devices.
- [A9124632044694\_3](/bulletins/10250322.md), 2024-03-06, Service bulletin: EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM\(GLOBAL POSITIONING SYSTEM\). This bulletin provides information pertaining to MMI Navigation database concerns.

JSON: [/v1/bulletins/10194403](/v1/bulletins/10194403)

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