Bosch 0445116030 Diesel Injector

On the 2.0L TDI CR (EA189) platform, a failing Bosch 0445116030 injector typically presents as: uneven idle, vibration or engine shaking; hard starting, especially cold; loss of power or hesitation under load; black smoke and higher fuel consumption; diesel knock / rattle, more noticeable when cold.

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 delivery drift showing as misfire-like running and deviation values out of range; injector electrical faults logging cylinder circuit or group codes; rail-pressure faults (pump, control valve, leaks) that mimic injector failure.

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

Read injector deviation values in diagnostic software — a large outlier identifies the weak unit. Injector symptoms overlap with dual-mass flywheel and EGR faults on the EA189 — rule them out before replacing hardware. On group or circuit codes, check the injector harness and connectors first. 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 0445116030 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 0445116030 trusted family covers 11 verified vehicle fitments across 4 makes: VW, Audi, Skoda and Seat. Every fitment listed on this page is registry-verified — no scraped or assumed applications.

0445116030 supersedes or cross-references 7 further OE numbers, including 0445116029, 0445116004, 0445116005, 0986435360, 0986435366, 03L130277 and 03L130855X. 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.