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2021 Mercedes-Benz Sprinter 3500
Reliability tier: verified - see /disclosure/
Engine: OM642 3.0L V6 BlueTEC (Mercedes-Benz OM642, 3.0L)
72-degree V6 turbodiesel, 188 hp / 325 lb-ft in this era, 7-speed automatic. VS30 generation (W907, built in Charleston SC since 2018): 188 hp / 325 lb-ft V6 diesel paired with the 7-speed automatic. Freightliner badging ended after MY2021.
Applicable failure modes (7)
- BlueTEC DEF/SCR: sensors, DEF quality, countdown derate (2010+)
- EGR valve and intake coking
- Fuel system: hard start / long crank and injector complaints
- Glow plug module and cold-start roughness
- Intake port shutoff (swirl) flap motor and stuck flaps
- Oil cooler stack seal leak (the signature OM642 repair)
- Turbo boost control: VNT actuator, leaks, limp episodes
Applicable parts (19)
- OM642 EGR Changeover Flap (642-140-03-00-64, current)
- OM642 EGR Cooler / Heat Exchanger (642-140-21-75, current)
- OM642 EGR Valve (642-140-14-60-64)
- OM642 EGR Valve Gasket (642-142-23-80)
- OM642 Fuel Filter (facelift, 642-090-63-52)
- OM642 Glow Plug Module (current, 642-900-13-02)
- OM642 High-Pressure Injection Pump (facelift, 642-070-12-01-80)
- OM642 Reman Common-Rail Injector (642-070-12-87-87)
- OM642 Intake Manifold Gasket (642-141-05-80)
- OM642 Intake Manifold, VS30 (642-090-09-00)
- mercedes-sprinter-om642: nox-sensor (honest catalog gap)
- OM642 Oil Cooler Seal/Gasket (642-188-05-80, current)
- OM642 Oil Cooler Stack (642-180-01-65)
- OM642 Oil Filter Element (642-180-00-09)
- OM642 Oil Filter Housing (642-180-14-10-64)
- OM642 Oil Filter Housing Gasket (642-184-00-80)
- OM642 Rail Pressure Sensor (006-153-78-28)
- OM642 Thermostat (642-200-20-15)
- OM642 Turbocharger - Reman (642-090-12-00-83, current)
Platform recipes (3)
- BlueTEC DEF/SCR derate (2010+): the countdown is a diagnosis chain, not a parts verdict - DEF quality and level sensing first, then the supply pump, tank hardware last (the big bill)
- Diagnosis-driven EGR/intake service: clean before you replace
- The signature OM642 repair: the oil-to-coolant stack sits deep in the V of the banks, so the intake and ancillaries come off for access