Image is for illustration purposes only. Actual part may vary.
EA0011400878-C
This is a core-return Diesel Exhaust Fluid (DEF) supply pump. The pump is responsible for drawing DEF from the tank and delivering it to the selective catalytic reduction (SCR) system, which helps reduce harmful nitrogen oxide (NOx) emissions from the exhaust. It is a non-air-assisted pump that activates only when commanded by the engine's aftertreatment control module. This specific part number is designated as a core, meaning it is a used component intended to be rebuilt or remanufactured, and it typically carries a core deposit when purchased as a reman unit to incentivize returning the old part.
The 'EA0011400878' base number is a non-air-assisted DEF doser pump for Detroit Diesel engines meeting EPA 10/13 emissions standards. Fitment was verified against aftermarket cross-reference listings for Freightliner and Western Star models [truckpipesusa.com](https://www.truckpipesusa.com/detroit-diesel-non-air-assisted-def-doser-pump-0001404878-0011400878/). The '-C' suffix indicates this is a core unit, not a new or remanufactured part; the core is used across the same applications as the active part number.
Part Number: EA0011400878-C
DEF PUMP CORE
Dealer: Post Onsite
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