Description
The 4M51-12A650-NE is a factory-fitted engine management module shared across the Ford Focus and C-Max — two models built on the same C1 platform during the mid-2000s, sharing a common range of powertrain options. This ECU manages the engine’s core functions including fuel injection, ignition, variable valve timing and idle control, ensuring smooth and efficient operation of the applicable engine variant throughout its service life.
This module works within the Focus and C-Max’s communication network alongside the ABS module and instrument cluster, sharing real-time engine data across the CAN bus. It monitors input from the mass airflow sensor, manifold pressure sensor, crankshaft position sensor and exhaust oxygen sensors, using this information to maintain precise fuelling and ignition events under all driving conditions.
Failure of the engine ECU on the Focus or C-Max often presents as the engine starting briefly then stalling, intermittent no-start conditions especially when the engine is warm, loss of power with no single fault code pointing to a specific component, or recurring trouble codes for sensors that have been tested and found to be within specification.
This is a genuine used OEM part removed from a Ford Focus or C-Max and confirmed operational before sale. Used engine management modules may require coding or as-built data programming by a Ford-equipped workshop. Please verify the full part number against your existing ECU before ordering.
Returns accepted only for genuine faults — faulty on arrival, not as described, or wrong part supplied — requested within 14 days, with all 3 anti-tamper stickers intact. No returns for change of mind, incorrect installation, coding/programming, or buyer compatibility errors; checking compatibility (OEM number, firmware, vehicle) is the buyer’s responsibility. Full policy: https://giantparts.eu/refund-and-returns/
