Remanufactured fuel injection part, cross-ref 729642-51430, 729653-51300, 729647-51390. Bench-tested before shipment.
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729642-51430 is supplied as a remanufactured replacement fuel injection part. Cross-reference numbers: 729642-51430, 729653-51300, 729647-51390, 729659-51360, 729630-51320, 4TNV84, 4TNV88, 4TNV94. 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. 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. It costs little to confirm the diagnosis first. Compare return flow between cylinders and cut each injector in turn on a scan tool; if one cylinder makes no difference to running quality, that is your culprit. Fitment notes: injectors on the same engine wear together. Replacing only the failed unit often leaves the others close behind, and a single new injector reading differently from its neighbours will cause exactly the rough running you were trying to fix. Replacing as a matched set avoids that. Always fit new copper sealing washers and seals — used washers rarely seal a second time — and where the system requires injector classification or IQA codes, have them programmed to the ECU after fitting. Rebuilt rather than refurbished: full teardown and measurement, worn components replaced instead of cleaned and reused, sealing surfaces restored to specification, then bench calibration and testing. The record is what separates this from a used part — we can provide the test sheet for your order. Covered by a 12-month warranty.
| Part number | 729642-51430 |
| Condition | Remanufactured (not a genuine OEM new part) |
| Cross-reference | 729642-51430, 729653-51300, 729647-51390, 729659-51360, 729630-51320, 4TNV84, 4TNV88, 4TNV94, 4TNV98 |
| 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 |
How to tell a failing common rail injector from compression, turbo and air-side faults — and why the cheap checks come first.
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