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 ALLROAD PREMIUM PLUSREPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSELECTRICAL COMPONENT LOCATIONSCOMPONENT LOCATIONS: CONTROL MODULES IN MIDDLE PART OF VEHICLECOMPONENT LOCATIONS: CONTROL MODULES IN MIDDLE PART OF VEHICLENOX SENSOR 2 CONTROL MODULE -J881- / -GX46- COMPONENT LOCATION AND CONNECTOR END VIEWNOX SENSOR 2 CONTROL MODULE -J881- / -GX46-, ON THE UNDERBODYNOTES
2025 Audi A4 allroad Premium Plus
NOX Sensor 2 Control Module -J881- / -GX46-, ON THE UNDERBODY: Notes
2025 Audi A4 allroad Premium PlusSECTION Notes
Component Location
On the underbody, in center tunnel by exhaust tract.
Fig 1: NOX Sensor 2 Control Module -J881- / -GX46- Component Location And Connector End View (On The Underbody)
- 1 - Ignore
- 2 - NOX Sensor 2 Control Module -J881- / -GX46-
- A - Ignore
- B - 5-Pin Connector -T5x-, black
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.