BMW 1 Series (F40) B37D15A Injectors

BMW 1 Series (F40) B37D15A Overview

The BMW 1 Series (F40) with the B37D15A 1.5L Diesel engine was produced between 2019 and 2024. This vehicle uses Bosch common rail diesel injectors (primary part number 0445110598) operating at fuel pressures up to 2000 bar. The B37D15A engine in the BMW 1 Series (F40) produces and of torque. When replacing injectors on the BMW 1 Series (F40) B37D15A, 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 BMW 1 Series (F40)

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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 B37D15A Vehicles

Related Pages

Bosch 1.5L Diesel — browse compatible engines, vehicles, and injectors