Bosch 0445110351 Diesel Injector

On the 1.3L Multijet/JTD/TDCi/HDi/DDiS platform, a failing Bosch 0445110351 injector typically presents as: hard cold starting or long cranking, improving when warm; uneven idle and misfire-like shaking; hesitation and loss of power at low to mid revs; black smoke under load, white smoke on start-up; diesel smell or fuel traces around the top of the engine.

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 / internal return beyond specification — the documented cold-start failure pattern on this engine; injector seal blow-by producing soot and a chuffing sound at idle; nozzle wear degrading atomisation on high-mileage units.

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

Compare injector correction values and return flow — a failing unit shows abnormally high return. A cold-worse / warm-better pattern is the classic injector wear signature on the 1.3 MultiJet. Inspect injector bases for seal blow-by before diagnosis; clean seats and fit new washers on refit. 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 0445110351 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 0445110351 trusted family covers 18 verified vehicle fitments across 8 makes: Alfa Romeo, Fiat, Ford, Lancia, Vauxhall, Suzuki, Citroen and Peugeot. Every fitment listed on this page is registry-verified — no scraped or assumed applications.

0445110351 supersedes or cross-references 8 further OE numbers, including 0986435204, 1980EQ, 1723813, 55219886, 95517513, 1571063P00, 1571063P00000 and BS519F593AA. 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.