This is a genuine Toyota Engine Control Module (ECM), also known as the Powertrain Control Module (PCM). It is specifically designed for compatible Toyota ES models and is a direct replacement for part number 89661-05E01. The ECM is the 'brain' of your vehicle's engine management system. It monitors various sensors throughout the engine and controls critical functions such as fuel injection, ignition timing, and emissions. A failing ECM can lead to a wide range of performance issues, including poor fuel economy, rough idling, stalling, check engine lights, and even a no-start condition. Ensure your vehicle is running at its optimal performance by replacing a faulty ECM with this genuine Toyota part. Proper installation by a qualified technician is recommended to ensure correct function and avoid further damage.
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