Mercedes Sprinter Oil Filter Housing Gasket Set – Ajusa | NCV3 & VS30 3.0L OM642 | #6421801410REPKIT (2007–2022)

Replacing only one gasket when servicing the OM642 oil filter housing is a reliable way to create a second leak — the housing uses two distinct sealing gaskets, and both must be renewed together for a complete, leak-free repair. This is the Ajusa complete oil filter housing gasket set for NCV3 and VS30 Sprinters equipped with the 3.0L OM642 V6 diesel engine, a kit that includes both the housing-to-block gasket and the mid-flange gasket for a single, complete oil filter housing service.

What This Part Does

The oil filter housing gasket set contains the two sealing elements that prevent oil from escaping at the OM642's oil filter housing assembly. The first gasket — 6421840080 — seals the large flanged interface between the oil filter housing body and the engine block, maintaining the oil pressure boundary at the housing base. The second gasket — 6421801410 — seals the mid-housing flange, where the oil filter adapter interfaces with the housing body above the block connection. Both gaskets are exposed to sustained oil pressure and repeated thermal cycling with every cold start and shutdown cycle. When either degrades, oil seeps at the respective interface — and because the two leak points are in close proximity, it is often impossible to determine which gasket has failed without replacing both. The kit format eliminates this diagnostic ambiguity and ensures a complete, one-time repair.

Common Symptoms of Failing Oil Filter Housing Gaskets

• Oil seeping or dripping from the base or mid-section of the oil filter housing
• Oil accumulation on the engine block below the filter housing or on the exhaust
• Burning oil smell from oil dripping onto hot exhaust components
• Gradual oil level drop without obvious leak elsewhere on the engine
• Oil leak that returned after replacing only the block gasket — sign that the mid gasket also needs replacement

When to Replace

Replace the complete set any time the oil filter housing is removed for any reason — housing cleaning, oil cooler service, or inspection. Never replace only one gasket when both are accessible and of similar age. The kit also pairs with the individual housing gasket listing (6421840080ELR) for mixed-lot inventory situations.

NCV3 & VS30 OM642 Specific — VIN Verification Required

This gasket set is for NCV3 and VS30 Sprinters equipped with the 3.0L OM642 V6 diesel engine. Always verify your engine code and VIN before ordering. Contact us and we'll confirm fitment before you buy.

Fitment

• 2007–2018 Mercedes-Benz Sprinter 2500 / 3500 – 3.0L OM642 (NCV3/W906)
• 2007–2009 Dodge Sprinter 2500 / 3500 – 3.0L OM642 (NCV3)
• 2007–2018 Freightliner Sprinter 2500 / 3500 – 3.0L OM642 (NCV3)
• 2019–2022 Mercedes-Benz Sprinter 2500 / 3500 – 3.0L OM642 (VS30/W907)

✔ Complete kit — includes both housing-to-block gasket (6421840080) and mid-flange gasket (6421801410)
✔ Always replace both gaskets together — never replace only one
✔ Always verify VIN before ordering

Part Numbers

• Mercedes OEM: 6421801410 / 6421840080
• Manufacturer: Ajusa — 77026800
• Kit SKU: 6421801410REPKIT