Caterpillar original 116-8866 Common Rail Fuel Injector for Caterpillar C12 Engine, Replacement for OEM 170-5252, 153-7923 for Excavator Machinery with 147-0373 original new injector

As a core component in the global aftermarket diesel parts supply chain, the Caterpillar CAT 116-8866 (alternatively formatted as 1168866 or CA116-8866) is an industrial-grade diesel Injector GP purpose-built for heavy-duty Caterpillar engine applications. Public supplier listings commonly associate the injector with CAT C12, C10, 3176B, and 3196 engine platforms, while official Caterpillar parts channels recommend exact fitment verification via equipment or engine serial number. A full library of supplier-listed cross-reference numbers supports seamless parts search for global B2B buyers.

Engineered for harsh industrial operating conditions, the high-precision 116-8866 injector supports accurate fuel delivery, stable combustion, reduced fuel waste, smoother engine operation, and consistent reliable power output across demanding use cases. It serves professional diesel engine repair, engine rebuilding, remanufacturing, fleet maintenance, and equipment service workflows across construction, mining, marine, heavy truck, power generation, industrial power, and oilfield sectors. Units are available as new aftermarket, tested replacement, OEM-style, rebuilt, or remanufactured options to align with diverse customer requirements.

To eliminate fitment errors and order mismatches, buyers must confirm key details including exact engine model, equipment model, engine serial number, original injector part number, and physical part photos before order confirmation. All published cross-reference numbers are sourced from public aftermarket supplier listings, with broad catalog and reman-style numbers requiring additional serial number validation. This verification step ensures the delivered component matches specific equipment arrangements and supports long-term reliable engine performance.