DCRI300050 — Technical Research
Denso DCRI300050 (Denso 295050-0050, GM OE 55567729) common-rail injector for the GM/Opel 1.7 CDTi (A17DTS / Chevrolet LKR/LUD). Fitted across Astra J, Zafira Tourer C and Chevrolet Cruze/Orlando. GM MDI/Tech2 ID coding required. Remanufactured, calibrated, 12-month warranty. Key symptoms: Rough idle / vibration; Hard starting; Loss of power / limp mode; Black smoke. Common failure modes: Internal wear / high back-leakage; Nozzle coking / poor spray pattern; Water-in-fuel corrosion.
Denso DCRI300050 1.7 CDTi Common Rail Injector (Vauxhall/Opel Astra J, Zafira Tourer, Chevrolet Cruze)
Denso DCRI300050 (Denso 295050-0050, GM OE 55567729) common-rail injector for the GM/Opel 1.7 CDTi (A17DTS / Chevrolet LKR/LUD). Fitted across Astra J, Zafira Tourer C and Chevrolet Cruze/Orlando. GM MDI/Tech2 ID coding required. Remanufactured, calibrated, 12-month warranty. Key symptoms: Rough idle / vibration; Hard starting; Loss of power / limp mode; Black smoke. Common failure modes: Internal wear / high back-leakage; Nozzle coking / poor spray pattern; Water-in-fuel corrosion.
A leaking or out-of-calibration injector unbalances cylinder fuelling, felt as a shake at idle.
Excess back-leakage bleeds rail/line pressure during cranking, causing long or failed starts.
Out-of-range delivery or pressure deviation triggers a torque cut and limp home.
Poor atomisation or a dribbling nozzle over-fuels the cylinder.
Cylinder-specific injector, balance or fuel-metering fault codes are logged.
- InstallationWrite the Denso injector ID/QR correction code to the correct cylinder with GM MDI / Tech2 on fitment before road test.
- InstallationRenew the copper combustion washer and leak-off seals; torque the clamp/nut to manufacturer spec.
- MisdiagnosisRead live back-leakage and per-cylinder contribution data to confirm the weak cylinder before removal.
- TestingBench-test across delivery and back-leakage points and verify spray pattern before refit.
- WarningConfirm fitment by OE number and engine code before ordering; injector sub-variants are not always interchangeable.
What is injector DCRI300050?+
DCRI300050 is a DENSO common rail solenoid injector diesel injector for the GM / Opel / Chevrolet 1.7 CDTi (A17DTS). It is supplied remanufactured, bench-tested and calibrated to OEM specification.
Which vehicles use DCRI300050?+
It is fitted to the GM / Opel / Chevrolet 1.7 CDTi (A17DTS) — including Vauxhall/Opel Astra (J) 1.7 CDTi (A17DTS); Vauxhall/Opel Zafira Tourer (C) 1.7 CDTi (A17DTS); Chevrolet Cruze 1.7 VCDi (LKR/LUD); Chevrolet Orlando 1.7 VCDi (LKR/LUD). Confirm fitment by OE number and engine code.
What type of injector is DCRI300050?+
It is a DENSO Common Rail Solenoid Injector. Always confirm the OEM markings on the injector body before fitting.
Does DCRI300050 need coding when fitted?+
Yes — the Denso injector ID/QR correction code must be programmed to the correct cylinder using GM MDI/Tech2 on fitment.
What are the symptoms of a failing DCRI300050?+
Common signs are rough idle and vibration, hard starting, power loss or limp mode, black smoke and an engine-management light.
What causes these injectors to fail?+
Most failures come from poor fuel filtration, contamination and water in the fuel leading to wear, high back-leakage and nozzle coking. Fix the cause before fitting replacements.
Is a remanufactured DCRI300050 as good as new?+
A properly remanufactured injector is stripped, fitted with new wear parts, reassembled and recalibrated on a common-rail test bench to OEM tolerances, then supplied with a warranty.
Should I replace one injector or the full set?+
Replace the confirmed faulty injector first. On high-mileage engines fitting a matched set reduces the chance of a repeat fault, but it is not mandatory if the others test within spec.
Do you bench-test the injector before dispatch?+
Yes. Every unit is tested for delivery, back-leakage and spray pattern on a calibrated common-rail tester before it leaves us.
Is delivery and warranty included?+
Yes — the price includes free UK delivery and a 12-month warranty.
Does DCRI300050 need coding?+
Yes — Denso common-rail injectors carry an ID/QR correction code that must be programmed to the correct cylinder with GM MDI/Tech2 on fitment.
Which vehicles use DCRI300050?+
The GM/Opel 1.7 CDTi (A17DTS) in Astra J and Zafira Tourer C, and the Chevrolet 1.7 VCDi (LKR/LUD) in Cruze/Orlando. Confirm GM OE 55567729 before ordering.