CAT 3406E C15 C16 Fuel Injector 109-5021 Electronic Unit Injector (EUI)

CAT 3406E C15 C16 Fuel Injector 109-5021 109-5038 117-0481 117-0482 117-1148 – Electronic Unit Injector (EUI)

This electronic unit injector (EUI) is a direct, OEM-equivalent replacement for Caterpillar 3406E, C15 and C16 diesel engines. Cross-referenced against OEM part numbers 109-5021, 109-5038, 117-0481, 117-0482, 117-1148 and remanufactured numbers 0R-4331, 0R-4332, 0R-4893, it is a true bolt-on fit with no core required.

Each unit is flow-matched and 100% bench-tested for injection pressure, spray pattern and delivery volume — delivering consistent firing, faster cold starts, better fuel economy and lower smoke across the full load range. The hard-coated plunger resists wear from today's low-sulfur diesel, extending service life between overhauls.

Ideal for Class 8 on-highway trucks, underground loaders (R2900 class), mining and construction equipment, plus industrial and marine applications. Always verify fitment by engine serial number (ESN) before ordering.

We are a professional manufacturing factory dedicated to diesel engine spare parts. Our core product line covers diesel fuel injectors, injector nozzles, fuel injection pumps and complete injector repair kits. Backed by steady in-house stock, rigorous quality inspection and direct factory pricing, we partner with global wholesalers, maintenance workshops and machinery enterprises. We deliver premium reliable spare parts, fast lead time and all-round one-stop export service. We warmly welcome your inquiries and long-term business cooperation.