Question 1

What are the symptoms of a failing Belts & Pulleys on a NCV3 Sprinter?

Accepted Answer

Chirp or squeal on cold start that fades as the engine warms Rattle from the front of the engine at idle, quieter under load Belt edge fraying, glazing, or dust building up behind the pulleys Battery light flickering at idle as the belt slips on the alternator

Question 2

Which fault codes point to this NCV3 Sprinter repair?

Accepted Answer

P0562: System voltage low — a slipping belt underdrives the alternator. P0521: Oil pressure sensor performance if the drive has affected the pump. Confirm with a scan tool before ordering — codes narrow the system, not the exact part.

Question 3

Does Mercedes Sprinter Serpentine Belt Tensioner Assembly – OEM | OM642 3.0L V6 | #6422001370 fit my Sprinter?

Accepted Answer

Listed for NCV3 Sprinter, OM642 engine. Cross-reference 6422001370 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 engine code. Confirm the code on your engine data plate or build sheet matches before ordering.

Mercedes Sprinter Serpentine Belt Tensioner Assembly – OEM | OM642 3.0L V6 | #6422001370

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