Bosch 0445110255 Diesel Injector

On the 1.5L CRDi platform, a failing Bosch 0445110255 injector typically presents as: rough or hunting idle that improves at higher revs; hard starting or long cranking, especially cold; hesitation, flat spots or sluggish response under load; black smoke under load, white smoke on start-up; knock-like ticking at idle, higher fuel consumption.

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.

The documented failure modes on this platform are: injector wear or imbalance producing knock and rough idle; injector internal leakage bleeding off rail pressure and causing hard starts; leaking injector or seal producing diesel smell around the engine bay.

Internal wear cannot be repaired in situ — once delivery drifts outside calibration, remanufacture or replacement is the reliable fix.

Run a leak-off comparison across all four injectors — internal leakage is the classic hard-start cause on this engine. A rough idle that smooths at higher rpm is the typical injector-wear signature. Check for diesel smell or wetness around the injectors on suspected seal leaks. Injector coding is required after fitting — follow the manufacturer procedure.

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.

Each remanufactured 0445110255 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.

The 0445110255 trusted family covers 4 verified vehicle fitments across 2 makes: Hyundai and Kia. Every fitment listed on this page is registry-verified — no scraped or assumed applications.

0445110255 supersedes or cross-references 6 further OE numbers, including 0445110256, 0986435152, 0445110241, 0445110727, 338002A400 and 33800-2A400. 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.