Kubota KX040-4 Mini Excavator KX040-4 Injectors

Kubota KX040-4 Mini Excavator KX040-4 Overview

The Kubota KX040-4 Mini Excavator with the KX040-4 2.4L V2403 CR engine was produced between 2013 and 2024. This vehicle uses Bosch common rail diesel injectors (primary part number 0445110777) operating at fuel pressures up to 2000 bar. The KX040-4 engine in the Kubota KX040-4 Mini Excavator produces and of torque. When replacing injectors on the Kubota KX040-4 Mini Excavator KX040-4, 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 Kubota KX040-4 Mini Excavator

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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 Engine Codes for Kubota KX040-4 Mini Excavator

Related Pages

Bosch 2.4L V2403 CR — browse compatible engines, vehicles, and injectors