Bosch 0445110777 Diesel Injector
2.4L V2403 CR · 0445110777
Remanufactured Bosch 0445110777 (0 445 110 777) common-rail diesel injector for the Kubota V2403 2.4-litre engine — direct replacement for Kubota OE 1J801-53052 (also listed as 1J80153052). Fits Kubota KX040-4 mini excavators, L3301F / L3901F / L4701F compact tractors and MX4800H / MX5200F utility tractors powered by the V2403 common-rail unit. OEM-tested and calibrated with full flow and leak-back verification on CR318 PRO test bench. Includes 12-month unlimited-mileage warranty. Supplied as an exchange unit — return your old injector within 30 days.
8
Engine codes
4
OE / cross-refs
4
Vehicle fitments
12mo
Warranty
Common failure symptoms
On the 2.4L V2403 CR platform, a failing Bosch 0445110777 injector typically presents as: hard starting or extended cranking; rough or uneven idle; loss of power under load; excess smoke from the exhaust; cylinder misfire or contribution fault codes.
When two or more of these appear together, suspect the injector before peripheral systems — a comparative leak-off test and live-data cylinder-balance review will isolate the failed unit without tear-down.
When two or more symptoms appear together, suspect the injector before peripherals (EGR, glow plugs, turbo). A live-data leak-off test on each cylinder is the fastest route to the failed unit.
What Causes These Injectors To Fail
The documented failure modes on this platform are: injector back-leak beyond specification; nozzle wear degrading the spray pattern; combustion gas leaks past the injector seat washer.
Internal wear cannot be repaired in situ — once delivery drifts outside calibration, remanufacture or replacement is the reliable fix.
How Workshops Diagnose 0445110777 Faults
Run a comparative leak-off (back-leak) test across all injectors before condemning a single unit. Compare requested vs actual rail pressure in live data at idle and under load. Inspect injector connectors and wiring before replacing hardware.
Never condemn a common-rail injector on a fault code alone — codes identify the circuit or cylinder, while leak-off volumes and correction values identify the component.
How Every Unit Is Tested Before Despatch
Each remanufactured 0445110777 is fully stripped, ultrasonically cleaned and inspected; worn components are replaced with OE-grade parts. The rebuilt unit is then calibrated on a common-rail test bench against the manufacturer's specification sheet — delivery, back-leak and response are all verified before the injector is sealed and despatched with its calibration data on file.
Every unit carries a 12-month parts warranty and free UK delivery.
Vehicle Coverage At A Glance
The 0445110777 trusted family covers 4 verified vehicle fitments across 1 make: Kubota. Every fitment listed on this page is registry-verified — no scraped or assumed applications.
OE & Cross-References
0445110777 supersedes or cross-references 2 further OE numbers, including 1J80153052 and 1J801-53052. Always match the reference etched on your failed unit's body — cross-references within a family are verified equivalents, but etched numbers remain the source of truth.
Related fault codes & engine guides
Trusted compatibility
OE / cross-references (2)
Vehicle fitments
| Make | Model | Engine | Years |
|---|---|---|---|
| Kubota | KX040-4 Mini Excavator | 2.4 V2403 Common Rail (Kubota) | 2013–2024 |
| Kubota | L3301F / L3901F Compact Tractor | 2.4 V2403 Common Rail (Kubota) | 2014–2024 |
| Kubota | L4701F Compact Tractor | 2.4 V2403 Common Rail (Kubota) | 2014–2024 |
| Kubota | MX4800H / MX5200F Tractor | 2.4 V2403 Common Rail (Kubota) | 2015–2024 |
Confirm fitment by registration
Enter your UK registration to verify your vehicle is in this trusted family. We'll cross-check the engine code against KX040 / KX040-4 / L3301F and the rest of the cluster.
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Frequently asked
Related engine guides
Other Bosch and same-platform injector families worth checking.
All cross-references in this family
Every reference below resolves to a PDP linked to this trusted family. 0445110777, 1J80153052, 1J801-53052.
Bosch know-how from the Knowledge Centre
Identification, coding, fitting and the mistakes that cause comebacks.