Denso DCRI300770 Diesel Injector

1.6L CDTi · Remanufactured

Remanufactured Denso DCRI300770 diesel injector for Vauxhall/Opel 1.6 CDTi applications. Direct replacement for Vauxhall Astra, Insignia, Mokka, Zafira and Opel equivalents with B16DTN and B16DTJ engines. Cross-references 2950500770, HU2950500770, 55570012, 95521531. OEM-tested and calibrated with full flow and leak-back verification on CR318 PRO test bench. Includes 12-month unlimited-mileage warranty. Supplied as an exchange unit — return your old injector within 21 days.

Shared engine codes

B16DTN, B16DTJ

Compatible vehicles

Common DCRI300770 injector failure symptoms

Hard starting or extended cranking; rough or uneven idle; loss of power under load; excess smoke from the exhaust; cylinder misfire or contribution fault codes. 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

Injector back-leak beyond specification; nozzle wear degrading the spray pattern; combustion gas leaks past the injector seat washer. Internal wear cannot be repaired in situ — once delivery drifts outside calibration, remanufacture or replacement is the reliable fix.

How workshops diagnose DCRI300770 faults

Run a comparative leak-off (back-leak) test across all injectors before condemning a single unit. Compare requested vs actual rail pressure in live data at idle and under load. Inspect injector connectors and wiring before replacing hardware. Never condemn a common-rail injector on a fault code alone.

How every unit is tested before despatch

Each remanufactured DCRI300770 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 DCRI300770 trusted family covers 4 verified vehicle fitments across 1 makes: Vauxhall. Every fitment listed is registry-verified.

OE & cross-references

DCRI300770 cross-references 6 further OE numbers, including 2950500770, HU2950500770, 55570012, 55570012FB, 95521531 and 821035. Always match the reference etched on your failed unit's body.

Related fault codes & engine guides

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