Fitment:
Compatible with diesel vehicles equipped with SCR/emission control systems, including selected models of Saab 9-3, Renault Megane, and Mercedes-Benz E-Class (depending on engine variant).
OEM reference number: 6PN 358 186-121.
Installed after catalytic converter (downstream position) in exhaust emission system.
Used for NOx measurement in catalytic converter and SCR system operation.
Fitment must be confirmed by OEM part number and connector specification before installation.

FAQ:

Q1: How do I confirm this NOx sensor fits my vehicle?
A1: Match OEM number 6PN 358 186-121 with your original sensor and verify connector type, cable length, and mounting position.

Q2: Where is this sensor installed?
A2: It is installed after the catalytic converter (downstream position) in the exhaust system.

Q3: What are common failure symptoms?
A3: Engine warning light, SCR system fault, incorrect NOx readings, or reduced engine efficiency.

Q4: Is this sensor compatible with multiple brands?
A4: Yes, it is used across several European diesel platforms, but exact compatibility depends on engine and emissions system configuration.

Q5: Does replacement require programming?
A5: Some vehicles require system reset or diagnostic adaptation after installation.