Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSAUDI2025A4 QUATTRO PRESTIGEREPAIR AND DIAGNOSIS (SINGLE PAGE)ELECTRICALCOMPONENT LOCATIONSCOMPONENT LOCATIONS: CONTROL MODULES IN REAR PART OF VEHICLECOMPONENT LOCATIONS: CONTROL MODULES IN REAR PART OF VEHICLECONTROL MODULE FOR EMERGENCY CALL MODULE AND COMMUNICATION UNIT -J949- COMPONENT LOCATION AND CONNECTOR END VIEWCONTROL MODULE FOR EMERGENCY CALL MODULE AND COMMUNICATION UNIT -J949-, FROM DECEMBER 2021, ONLY FOR CHINA, WITH EXTERNAL VEHICLE COMMUNICATION (GW2)NOTES
2025 Audi A4 Quattro Prestige
Control module for emergency call module and communication unit -J949-, FROM DECEMBER 2021, ONLY FOR CHINA, WITH EXTERNAL VEHICLE COMMUNICATION (GW2): Notes
2025 Audi A4 Quattro PrestigeSECTION Notes
Component Location
In luggage compartment.
Fig 1: Control Module For Emergency Call Module And Communication Unit -J949- Component Location And Connector End View (From December 2021, Only For China, With External Vehicle Communication (GW2))
- A - 20-Pin Connector -T20ad-, black
- B - 20-Pin Connector -T20aj-, naturally cloudy
- C - 8-Pin Connector -T8bv-, blue
- D - 8-Pin Connector -T8bw-, black
- E - 8-Pin Connector -T8by-, white
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.