Bosch 0445117021 Diesel Injector

3.0L V6 TDI · Remanufactured

3.0L V6 TDI Remanufactured Common Rail Injector (Audi/VW/Porsche EA897)

Shared engine codes

CJGC, CJGA, CJGD, CJMA, CKVD, CLAA, CLAB, CLZB, CMHA, CPNA, CRCA, MCRCA

Compatible vehicles

Common 0445117021 injector failure symptoms

Uneven or unstable idle; ticking or knocking from the engine; hard or intermittent starting; hissing / chuffing with exhaust smell when an injector washer leaks; reduced power, hesitation or limp mode with warning lights. When two or more appear together, suspect the injector before peripherals — a comparative leak-off test isolates the failed unit without tear-down.

What causes these injectors to fail

Piezo injector electrical faults logging group supply-voltage codes; injector correction values drifting out of range as the piezo stack ages; injector sealing washer leaks allowing combustion blow-by around the injector. Internal wear cannot be repaired in situ — once delivery drifts outside calibration, remanufacture or replacement is the reliable fix.

How workshops diagnose 0445117021 faults

Compare injector balance / correction values across all six cylinders — an outlier identifies the failing unit. On group supply-voltage codes, check the injector harness and connectors for open circuits before replacing hardware. Check return flow to identify a hydraulically defective injector. Injector coding is required after fitting — follow the manufacturer procedure. Never condemn a common-rail injector on a fault code alone.

How every unit is tested before despatch

Each remanufactured 0445117021 is fully stripped, ultrasonically cleaned and inspected; worn components are replaced with OE-grade parts. The rebuilt unit is calibrated on a common-rail test bench against the manufacturer's specification — delivery, back-leak and response verified — and despatched with a 12-month parts warranty and its calibration data on file.

Vehicle coverage at a glance

The 0445117021 trusted family covers 4 verified vehicle fitments across 3 makes: Audi, Porsche and Volkswagen. Every fitment listed is registry-verified.

OE & cross-references

0445117021 cross-references 10 further OE numbers, including 0445117028, 0445117076, 0445117022, 0986435413, 0445116076, 059130277AS, 059130277CD and 059130277EJ. Always match the reference etched on your failed unit's body.

Related fault codes & engine guides

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