Mercedes Sprinter Front NOX Sensor – Ampro Technologie | NCV3 3.0L OM642 BlueTec | #000905851187 (2010–2018)

A failed front NOx sensor on a NCV3 Sprinter removes the ECU's upstream nitrogen oxide reference — disrupting AdBlue dosing calculations, logging emissions fault codes, and triggering the power restriction sequence that escalates with each subsequent cold start until the sensor is replaced. This is the Ampro Technologie front NOx sensor for NCV3 Sprinters equipped with the 3.0L OM642 BlueTec diesel engine, a direct replacement that restores accurate upstream NOx measurement and proper aftertreatment system control.

What This Part Does

The front NOx sensor is positioned upstream in the exhaust aftertreatment system and measures the engine-out nitrogen oxide concentration before AdBlue injection and SCR processing. The ECU uses this upstream reading as the baseline to calculate the correct AdBlue dosing rate and to verify that the SCR catalyst is achieving the required NOx reduction efficiency by comparing it against the downstream sensor reading. Without accurate upstream data, the ECU cannot determine the correct dosing rate, cannot verify catalyst performance, and cannot distinguish between a dosing fault, a catalyst fault, or a sensor fault. This causes the system to log emissions faults, enter a protected operating mode, and on the BlueTec system, begin the AdBlue countdown sequence that restricts starts and eventually prevents operation.

Common Symptoms of a Failing Front NOx Sensor

• Check engine light with fault codes related to upstream NOx sensor signal or circuit
• Engine entering limp mode or emissions system power restriction
• AdBlue dosing that is erratic, excessive, or insufficient with no dosing system fault identified
• NOx or SCR efficiency fault codes that return after clearing
• AdBlue countdown warning in the instrument cluster

When to Replace

Replace when the sensor is confirmed faulty by XENTRY or a compatible scan tool with active upstream NOx fault codes. Always use OEM-quality sensors — aftermarket NOx sensors are known to produce signal drift that causes persistent faults even after installation. When replacing the front sensor, inspect the downstream sensor at the same time, as both operate as a system.

NCV3 OM642 BlueTec Specific — VIN Verification Required

This is the front (upstream) NOx sensor for NCV3 Sprinters equipped with the 3.0L OM642 BlueTec diesel engine. It is not compatible with VS30 Sprinters or NCV3 Sprinters without the BlueTec/AdBlue emissions system. Always verify sensor position, engine code, and VIN before ordering. Contact us and we'll confirm fitment before you buy.

Fitment

• 2010–2018 Mercedes-Benz Sprinter 2500 – 3.0L OM642 BlueTec (NCV3/W906)
• 2010–2018 Mercedes-Benz Sprinter 3500 – 3.0L OM642 BlueTec (NCV3/W906)
• 2010–2018 Freightliner Sprinter 2500 / 3500 – 3.0L OM642 BlueTec (NCV3)

✔ Front (upstream) position only — downstream sensor requires a different part number
✔ BlueTec models only — 2010 and later

Part Numbers

• Mercedes OEM: 000905851187 / A000905851187 / 000-905-85-11-87
• Core part number: 0009058511 / A0009058511
• Manufacturer: Ampro Technologie — A1038511
• SKU: 000905851187