Fitment
Compatible with Mercedes-Benz diesel SUVs including Mercedes-Benz W166 ML350 and Mercedes-Benz X166 GL350 equipped with SCR (Selective Catalytic Reduction) emission systems requiring NOx monitoring. Used in exhaust aftertreatment systems where OEM part number A0081539828 or cross reference 5WK96642B is specified. Verify exact OEM number and emission system configuration before installation.

FAQ
Q1: What does this NOx sensor measure?
A: It measures nitrogen oxides (NOx) in diesel exhaust gases for SCR emission system control.

Q2: Which vehicles is it compatible with?
A: It is used in Mercedes-Benz W166 ML350 and X166 GL350 diesel models depending on emission system configuration.

Q3: Is this a universal part?
A: No, compatibility depends strictly on OEM part number A0081539828 or equivalent reference 5WK96642B.

Q4: Does installation require programming?
A: Some vehicles may require ECU reset or diagnostic adaptation after replacement.

Q5: Where is it installed?
A: It is installed in the exhaust aftertreatment system, typically upstream or downstream of the SCR catalyst.