Bosch 0445111125 Diesel Injector
1.6L · 0445111125
Remanufactured Bosch 0445111125 common-rail diesel injector for the Fiat / Jeep 1.6 MultiJet II engine (FCA OE 46348598 / 0046348598, Mopar K0046348598; engine references 55260384 / 46346020). Fits Fiat Tipo (356) 1.6 MultiJet II 2015–2021, Fiat 500X 1.6 MultiJet II 2014–2021, Jeep Renegade 1.6 MultiJet II 2014–2021 and Jeep Compass 1.6 MultiJet II 2017–2021 (95–120 hp variants). Note: PSA-coded 9HF 1.6 HDi engines use the separate Bosch 0445110340 family; Alfa Romeo Giulietta 1.6 JTDm uses 0445110524 — neither is covered by this injector. Fully tested and calibrated to OEM specification with 12 months warranty.
2
Engine codes
4
OE / cross-refs
4
Vehicle fitments
12mo
Warranty
Common failure symptoms
On the 1.6L platform, a failing Bosch 0445111125 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 0445111125 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 0445111125 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 0445111125 trusted family covers 4 verified vehicle fitments across 2 makes: Fiat and Jeep. Every fitment listed on this page is registry-verified — no scraped or assumed applications.
OE & Cross-References
0445111125 supersedes or cross-references 3 further OE numbers, including 46348598, 0046348598 and K0046348598. 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 (3)
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 55260384 / 46346020.
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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. 0445111125, 46348598, 0046348598, K0046348598.
Bosch know-how from the Knowledge Centre
Identification, coding, fitting and the mistakes that cause comebacks.