Mercedes-Benz Citan K9K646 Injectors

Mercedes-Benz Citan K9K646 Overview

The Mercedes-Benz Citan with the K9K646 1.5L dCi/CDI engine was produced between 2012 and 2019. This vehicle uses Siemens VDO / Continental common rail diesel injectors (primary part number H8201100113) operating at fuel pressures up to 2000 bar. The K9K646 engine in the Mercedes-Benz Citan produces and of torque. When replacing injectors on the Mercedes-Benz Citan K9K646, 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 Mercedes-Benz Citan

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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 Mercedes-Benz Citan

Other K9K646 Vehicles

Related Pages

Siemens VDO / Continental 1.5L dCi/CDI — browse compatible engines, vehicles, and injectors