Remanufactured injector, cross-ref 3784609, 378-4609, 20R3452. Bench-tested before shipment.
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3784609 is supplied as a remanufactured replacement injector. Cross-reference numbers: 3784609, 378-4609, 20R3452, 20R-3452. Application recorded for this part: C15 C13 349 E349. The injector sits at the end of the rail and does the final metering work: it receives fuel already at high pressure and decides both how much enters the cylinder and how well atomised it is. That combination governs power, smoke and fuel consumption more directly than almost any other part on the engine. Common indicators are rough or unstable idle, smoke that was not there before, higher fuel consumption on the same duty cycle, diesel knock under load, and in some cases fuel dilution of the engine oil from an injector that is leaking internally. Do a return-flow check before buying anything. Comparing leak-off volumes between cylinders takes minutes, and if one injector returns far more than its neighbours, that single test has answered the question. Before fitting: clean the seat thoroughly, use new copper washers and seals, and torque the clamp to the engine manufacturer’s figure. Replace as a set where possible, and check whether the ECU needs the new units’ classification codes written in afterwards. What we do differently: every core is stripped to components, inspected against wear limits and measured before anything is reused. Worn parts are replaced, not cleaned and refitted. After reassembly the unit is bench-tested — delivery, return flow, opening pressure and leakage — and only units inside specification are dispatched. We can send the test sheet for your order before it leaves. Every remanufactured unit carries a 12-month warranty.
| Part number | 3784609 |
| Condition | Remanufactured (not a genuine OEM new part) |
| Cross-reference | 3784609, 378-4609, 20R3452, 20R-3452 |
| Application | C15 C13 349 E349 |
| Process | Disassembled, cleaned, measured, wear parts replaced, machined to specification |
| Bench test | Delivery, return flow, opening pressure and leakage recorded before dispatch |
| Warranty | 12 months |
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