ITMENT
Compatible with modern diesel vehicles equipped with SCR (Selective Catalytic Reduction) systems using Bosch-style NOx sensors.
Common applications include Euro 5 / Euro 6 diesel engines where part references include:

• 5WK96765A
• SNS165A (SNS165A variant)
• A2C89789800-01

Typical use in European passenger cars and light commercial diesel vehicles with AdBlue systems (exact OEM fitment varies by engine code).

FAQ
Q1: What is the function of this NOx sensor?
A1: It measures nitrogen oxide (NOx) levels in the exhaust and sends real-time data to the ECU to regulate AdBlue/DEF injection for emissions control.

Q2: Where is it installed?
A2: It is mounted in the exhaust system, usually before or after the SCR catalytic converter depending on vehicle design.

Q3: What are symptoms of failure?
A3: Engine warning light, SCR/AdBlue system fault messages, NOx sensor error codes, reduced power, or limp mode.

Q4: Is it universal?
A4: No, despite shared reference numbers, compatibility depends on ECU calibration, engine model, and emissions system configuration.