Mercedes Sprinter Exhaust Backpressure Sensor – Genuine Mercedes-Benz | NCV3 3.0L OM642 | #0071534328 (2007–2012)

A failed exhaust backpressure sensor on a NCV3 Sprinter removes the ECU's ability to monitor exhaust pressure at the turbocharger — disrupting variable geometry turbo control, triggering fault codes, and causing the ECU to fall back on default boost management that reduces performance and may cause over- or under-boost conditions. This is the Genuine Mercedes-Benz exhaust backpressure sensor for early NCV3 Sprinters equipped with the 3.0L OM642 V6 diesel engine, a direct replacement that restores accurate exhaust pressure feedback and proper VGT turbocharger control.

What This Part Does

The exhaust backpressure sensor monitors the pressure in the exhaust manifold and turbocharger turbine inlet area, providing the ECU with real-time data about exhaust system load. On the OM642's variable geometry turbocharger system, exhaust backpressure data is one of the inputs used alongside boost pressure and engine load to calculate the correct VGT vane position for the current operating condition. When exhaust backpressure rises abnormally — from a clogged DPF, restricted exhaust, or restricted turbo outlet — the sensor detects it and the ECU responds to protect the engine. When the sensor itself fails or provides implausible data, the ECU loses this input and falls back on fixed values, causing VGT control errors and associated fault codes.

Common Symptoms of a Failing Exhaust Backpressure Sensor

• Check engine light with fault codes related to exhaust backpressure sensor circuit or plausibility
• Boost or turbo-related fault codes without an identifiable boost system leak
• Rough idle or hesitation under load from inaccurate VGT control
• Reduced power or sluggish throttle response in default turbo management mode
• Fault codes that return after clearing without other exhaust system faults identified

When to Replace

Replace when the sensor is confirmed faulty by XENTRY or a compatible scan tool with active exhaust backpressure sensor fault codes, and the exhaust system, DPF, and turbocharger have been ruled out as the source of abnormal pressure. Also replace when the sensor's connecting pressure line is found cracked or blocked — the line and sensor should be replaced together.

NCV3 OM642 Specific — VIN Verification Required

This exhaust backpressure sensor is for early NCV3 Sprinters equipped with the 3.0L OM642 V6 diesel engine. Always verify your engine code and VIN before ordering — exhaust sensor configurations vary by model year and emissions specification. Contact us and we'll confirm fitment before you buy.

Fitment

• 2007–2012 Mercedes-Benz Sprinter 2500 – 3.0L OM642 (NCV3/W906)
• 2007–2012 Mercedes-Benz Sprinter 3500 – 3.0L OM642 (NCV3/W906)
• 2007–2012 Freightliner Sprinter 2500 / 3500 – 3.0L OM642 (NCV3)
• 2007–2009 Dodge Sprinter 2500 / 3500 – 3.0L OM642 (NCV3)

✔ Early OM642 only — later model years use an updated sensor part number
✔ Always verify VIN and model year before ordering

Part Numbers

• Mercedes OEM: 0071534328 / A0071534328 / 007-153-43-28
• Cross-reference: 0091535028
• Manufacturer: Genuine Mercedes-Benz — MBZ0071534328-100F
• SKU: 0071534328