Bosch original 3835257 Diesel Unit Injector Replacement for OEM 20440412, compatible with Volvo D12, FH12, FM12, engines, for EC700 Excavator, cross reference 21160093, 3836007 original new injector

The Bosch 702 Series Unit Injector 3835257 is an original, electronically controlled Unit Injector System (UIS/PDE) engineered to OE specifications for Volvo heavy-duty diesel engines. By integrating fuel pressurization and injection into a single compact assembly, this genuine Bosch injector delivers precise fuel metering and optimized atomization, directly contributing to improved combustion efficiency, lower emissions, and extended engine durability.

Operating through a camshaft-driven plunger and an ECU-controlled solenoid valve, the injector generates extremely high injection pressure and opens at precisely calculated timing. Fuel passes through micro-precision nozzle holes to form an optimized spray pattern, resulting in higher engine output, better combustion quality, improved fuel efficiency, and lower operating costs. Genuine Bosch design ensures stable injection performance, long operating life, and fleet-grade reliability under demanding heavy-duty conditions.

Referenced across OEM, aftermarket, and remanufacturing databases, this unit injector suits Volvo D12A, D12C, and D12D engines and the wider D12 heavy-duty engine family, powering Volvo FH12, FM12, and NH12 trucks as well as the B12 bus and coach chassis. Typical deployment covers long-haul logistics fleets, diesel generator systems, construction equipment, agricultural machinery, mining operations, and marine support engines. Each unit is supplied in export-grade packaging, making it a dependable OEM genuine replacement for global distributors, fleet maintenance providers, and engine overhaul specialists.