Question 1

What are the symptoms of a failing Emissions & Exhaust on a NCV3 Sprinter?

Accepted Answer

Check engine light with a countdown to "no restart" or a reduced-speed warning on the cluster Limp mode after highway driving, or regeneration cycles that never complete Strong diesel or ammonia smell, visible soot, or a rattling exhaust component Fuel economy dropping several MPG with no change in how the van is driven AdBlue/DEF consumption climbing or a DEF quality warning that returns after a top-up

Question 2

Which fault codes point to this NCV3 Sprinter repair?

Accepted Answer

P2002 / P244A / P244B: Particulate filter efficiency or differential pressure out of range. P20EE / P207F: SCR catalyst efficiency below threshold. P229F / P2201: NOx sensor circuit or signal implausible. P0401 / P0404: EGR flow insufficient or EGR position performance. P042E: EGR/exhaust flap stuck open. Confirm with a scan tool before ordering — codes narrow the system, not the exact part.

Question 3

Does Mercedes Sprinter Front NOX Sensor – Genuine OEM | NCV3 OM642 & OM651 BlueTec | #0009053503 (2012–2018) fit my Sprinter?

Accepted Answer

Listed for NCV3 Sprinter, 2012–2018, OM642 / OM651 engine. Cross-reference 0009053503 against the number on the component you are replacing. Listed for the NCV3 generation (2007–2018). Part numbers can differ within a generation by year and engine code — send the VIN and we'll confirm the exact number. This part is listed for the OM642 / OM651 engine code. Confirm the code on your engine data plate or build sheet matches before ordering.

Mercedes Sprinter Front NOX Sensor – Genuine OEM | NCV3 OM642 & OM651 BlueTec | #0009053503 (2012–2018)

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