Remanufactured injector assembly, cross-ref 456-3645, 20R-5076, 20R5076. Bench-tested before shipment.
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456-3645 is supplied as a remanufactured replacement injector assembly. Cross-reference numbers: 456-3645, 20R-5076, 20R5076. Application recorded for this part: C9.3. This is the last precision component in the fuel path. Everything upstream exists to deliver clean fuel at stable pressure; this unit decides when combustion starts and how completely the charge burns. That is why injector condition shows up so directly in noise, smoke and emissions. Symptoms that point to injector wear include hard starting when hot, rough idle, white smoke at start-up or black smoke under load, a sharp knocking from one cylinder, increased fuel consumption and a gradual loss of power. Because those symptoms also point to compression, turbocharger or air-side problems, it is worth confirming before ordering. A return-flow (back-leakage) test across all injectors and a cylinder cut-out test will usually identify both whether the fault is injector-related and which cylinder is responsible. Fit as a matched set rather than singly — one new injector among worn neighbours reproduces the uneven running you set out to cure. New sealing washers every time, clean seats, correct torque, and where applicable, program the injector codes into the ECU once fitted. Rebuild process: full teardown and measurement first, then replacement of all wear components, machining back to specification where required, followed by calibration and bench testing. The difference between this and a cleaned used part is the measurement and test record — we hold every unit to the specification for the part number, not just to 'it runs'. Test sheets available on request, and every unit ships with a 12-month warranty.
| Part number | 456-3645 |
| Condition | Remanufactured (not a genuine OEM new part) |
| Cross-reference | 456-3645, 20R-5076, 20R5076 |
| Application | C9.3 |
| 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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