Ford S-Max QYWA Injectors

Ford S-Max QYWA Overview

The Ford S-Max with the QYWA 1.8L TDCi engine was produced between 2006 and 2014. This vehicle uses Siemens VDO / Continental common rail diesel injectors (primary part number A2C59511610) operating at fuel pressures up to 2000 bar. The QYWA engine in the Ford S-Max produces and of torque. When replacing injectors on the Ford S-Max QYWA, 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 Ford S-Max

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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 Ford S-Max

Other QYWA Vehicles

Related Pages

Siemens VDO / Continental 1.8L TDCi — browse compatible engines, vehicles, and injectors