1427240 BMW E46 E39 M52 M54 Petrol Fuel Injector – OEM Used & Tested

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This BMW M52 M54 Petrol Fuel Injector is a genuine OEM fuel system component for the BMW E46 and E39 with the M52 and M54 petrol engines. Primary OEM number 1427240. It is designed to meter and spray fuel into the intake port of the petrol engine in a fine, accurate pattern, as commanded by the engine control unit.

Its job is to open for a precise time on each cycle and atomize the fuel so that it mixes well with the intake air. A properly working injector supports even fuel delivery, smooth idle, good throttle response, efficient combustion and correct operation of the fuel injection system. Injectors work in a hot environment and are exposed to deposits and wear over time, so a tested replacement is a practical way to restore even fuel delivery without the cost of a brand new part. Fuel injectors are precision parts, so a unit that has been tested is a sensible choice for restoring normal engine behavior.

Common signs of a faulty unit include rough idle, misfires, hesitation under acceleration, higher fuel consumption, a fuel smell, hard starting, or fault codes for lean or rich mixture or a misfiring cylinder. When an injector is clogged, leaking or sticking, the fuel injection system may deliver the wrong amount of fuel, which can cause misfires, poor running and extra wear on the catalytic converter.

This is a used original part, removed from a vehicle and tested before sale. Match the exact OEM number 1427240 before ordering. Professional installation is recommended, and cleaning or replacing the seals and checking the fuel rail is advised where applicable.