Bosch 0445110250 Diesel Injector
2.5L CRDi · 0445110250
Remanufactured BOSCH 0445110250 common-rail diesel injector (Bosch Exchange 0986435123) for the Ford Ranger 2.5 TDCi and Mazda BT-50 2.5 MRZ-CD (2006–2011, WLAA / WLC / WL3 / WLT engine family). OE references Ford 1449261 / 6M34-9F595-BA and Mazda WLAA-13-H50 — the Mazda number is etched on the injector body. Fully tested and calibrated to OEM specification with 12 months warranty.
3
Engine codes
7
OE / cross-refs
2
Vehicle fitments
12mo
Warranty
Common failure symptoms
On the 2.5L CRDi platform, a failing BOSCH 0445110250 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 0445110250 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 0445110250 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 0445110250 trusted family covers 2 verified vehicle fitments across 2 makes: Ford and Mazda. Every fitment listed on this page is registry-verified — no scraped or assumed applications.
OE & Cross-References
0445110250 supersedes or cross-references 6 further OE numbers, including 0986435123, 1449261, WLAA13H50, WLAA-13-H50, 6M349F595BA and 6M34-9F595-BA. 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 (6)
Vehicle fitments
| Make | Model | Engine | Years |
|---|---|---|---|
| Ford | Ranger (PJ/PK) | 2.5 TDCi (WLAA) | 2006–2011 |
| Mazda | BT-50 | 2.5 MRZ-CD (WLAA) | 2006–2011 |
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 WLC / WL3 / WLT.
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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. 0445110250, 0986435123, 1449261, WLAA13H50, WLAA-13-H50, 6M349F595BA, 6M34-9F595-BA.
Bosch know-how from the Knowledge Centre
Identification, coding, fitting and the mistakes that cause comebacks.