Hyundai i40 (VF) D4FD Injectors

Hyundai i40 (VF) D4FD Overview

The Hyundai i40 (VF) with the D4FD 1.7L CRDi engine was produced between 2011 and 2019. This vehicle uses Bosch common rail diesel injectors (primary part number 0445110411) operating at fuel pressures up to 2000 bar. The D4FD engine in the Hyundai i40 (VF) produces and of torque. When replacing injectors on the Hyundai i40 (VF) D4FD, 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 Hyundai i40 (VF)

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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 D4FD Vehicles

Related Pages

Bosch 1.7L CRDi — browse compatible engines, vehicles, and injectors