Bosch 0445110279 Diesel Injector

On the 2.5L CRDi platform, a failing BOSCH 0445110279 injector typically presents as: rough or hunting idle that improves at higher rpm; hard cold starts or long cranking; hesitation or jerking under acceleration; black or white smoke; metallic knock / ticking with diesel smell.

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 back-leak beyond specification causing rail-pressure loss; nozzle wear causing over-fuelling, knock and smoke; poor atomisation from worn injectors producing white/grey smoke and incomplete combustion.

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

Run a leak-off / return-flow test and compare injector balance data before condemning a single unit. Separate injector faults from rail-pressure, EGR and fuel-supply faults — the symptoms overlap on this engine. Clean injector bores and seats thoroughly and fit new sealing washers on every refit.

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 0445110279 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 0445110279 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.

0445110279 supersedes or cross-references 10 further OE numbers, including 33800-4A000, 338004A000, 33800-4A100, 338004A100, 33800-4A150, 338004A150, 33800-4A160 and 338004A160. 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.