Opel Astra H Z17DTH Injectors

Opel Astra H Z17DTH Overview

The Opel Astra H with the Z17DTH 1.7L CDTi engine was produced between 2004 and 2010. This vehicle uses Denso common rail diesel injectors (primary part number DCRI105080) operating at fuel pressures up to 2000 bar. The Z17DTH engine in the Opel Astra H produces and of torque. When replacing injectors on the Opel Astra H Z17DTH, always use new copper sealing washers and torque to manufacturer specifications. Each injector should be coded to the ECU after fitting.

Compatible Injectors

Common Injector Problems in Opel Astra H

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  Rough idle and engine vibration — Worn injector nozzles cause uneven fuel spray, leading to rough idle at low RPM. Most noticeable when the engine is cold.
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  Excessive exhaust smoke — Black or blue-grey smoke on acceleration indicates poor fuel atomisation. This is often caused by carbon buildup on the injector nozzle tip.
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  Poor fuel economy — A worn or leaking injector delivers incorrect fuel quantities, reducing efficiency by 10–20% in severe cases.
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  Engine misfire under load — Intermittent misfires during acceleration suggest one or more injectors are failing to deliver the correct fuel pressure.
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  Difficult cold starting — Degraded injector nozzles struggle to atomise fuel at lower cranking pressures, causing extended crank times in cold weather.

Other Z17DTH Vehicles

Related Pages

Denso 1.7L CDTi — browse compatible engines, vehicles, and injectors