{"product_id":"toyota-oem-engine-control-unit-ecu-ecm-89661-02021-denso-4a-ge-a-t-ae82-corolla-fx16-gt-s","title":"Toyota OEM Engine Control Unit (ECU\/ECM) 89661-02021 — Denso — 4A-GE A\/T — AE82 Corolla FX16 GT-S","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eGenuine Toyota Denso engine control unit (ECU\/ECM), part \u003cstrong\u003e#89661-02021\u003c\/strong\u003e. This is the factory engine computer that manages fuel injection, ignition timing, and engine management for the 4A-GE 1.6L twin-cam, automatic-transmission application — note the factory \"ENGINE CONTROL — TOYOTA — DENSO\" label and the \u003cstrong\u003e4A-G A\/T\u003c\/strong\u003e marking.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eOriginal Toyota \/ Denso unit, not an aftermarket or refurbished substitute. It mounts in the cabin behind the dash\/kick panel area (see factory diagram, position 89661). A failing ECU can cause no-start conditions, poor running, erratic idle, or check-engine codes, so a correct OEM unit is the right fix when sensors and wiring check out.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eToyota Corolla FX16 GT-S (AE82) — 4A-GE 1.6L, automatic transmission\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eRelated E80-chassis 4A-GE A\/T applications using 89661-02021\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e This is the \u003cstrong\u003eautomatic-transmission (A\/T) calibration\u003c\/strong\u003e. Manual-transmission 4A-GE cars use a different ECU — do not fit this to a manual car.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eCondition:\u003c\/strong\u003e Used OEM unit, removed from vehicle. (See note below on tested status.)\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eReturns:\u003c\/strong\u003e Backed by our 30-day return policy.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003ePlease confirm your original ECU is \u003cstrong\u003e89661-02021\u003c\/strong\u003e before ordering — engine computers are calibration-specific and vary by engine, transmission, and market.\u003c\/p\u003e","brand":"DENSO","offers":[{"title":"Default Title","offer_id":45179843346515,"sku":null,"price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0669\/3725\/8067\/files\/ecu1.jpg?v=1780460249","url":"https:\/\/www.3toygarage.com\/products\/toyota-oem-engine-control-unit-ecu-ecm-89661-02021-denso-4a-ge-a-t-ae82-corolla-fx16-gt-s","provider":"3 Toy Garage","version":"1.0","type":"link"}