奥迪氮氧传感器 SNS451 12V陶瓷芯片 4G0907807S 排放控制
Audi NOx sensor SNS451, 12V ceramic core, for Audi models, OEM SNS, precise emission monitoring, optimized combustion efficiency.
Replaces OEM #
MOQ
1件
Vehicle Fitment(1 items)
| Vehicle Model / Generation | Year | Engine | Specification |
|---|---|---|---|
| S4 | 1997 ~ null | — | — |
Specifications
Cross Reference / OEM
Audi-specific SNS451 NOx sensor, using 12V ceramic core technology; OEM number 4G0907807S; direct replacement for original part. Installed near the SCR catalyst in the exhaust system; continuously monitors NOx in exhaust and transmits data to the ECU to regulate urea injection to maintain emissions compliance. Compatible with Audi A4, A5, Q5 with 2.0T or 3.0T diesel engines. Installation difficulty: medium; labor about 1.5 hours. Pay particular attention to wiring harness routing to avoid signal interference. If the vehicle shows “Check Engine,” abnormal urea consumption, weak acceleration, or emissions out of spec, sensor aging is likely.
FAQ — Motuon
奥迪氮氧传感器 SNS451 12V陶瓷芯片 4G0907807S 排放控制
SNS