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89661-58170 / 275300-3844 Toyota Alphard 2008-2014 Engine Control Unit ECU.
Product Description
The Engine Control Unit (ECU) with OEM part numbers 89661-58170 (Toyota) and 275300-3844 is a factory electronic control module used in Toyota Alphard / Vellfire (especially ANH20 / AH20 series) built ~2008-2015. This ECU governs essential engine operations: fuel injection timing, ignition control, sensor input processing, emissions management, and diagnostic functions.
The unit is often supplied in used / remanufactured / tested condition. Before installing, it’s critical to verify that the part number matches your original unit and that the connector wiring, hardware version, and firmware are compatible. In many cases, programming, variant reflash, or immobilizer adaptation will be required to tie the ECU to your vehicle’s VIN and security system.
One listing confirms that for Alphard DBA-ANH20W, the ECU 89661-58170 / 275300-3844 is used.
Another parts catalog shows the ECU 89661-58170 is part of the electronic fuel injection system for Alphard ANH20W models.
The part appears in genuine parts listings as “Computer, Engine Control Toyota, 89661-58170” for Alphard / Vellfire models.
Compatibility Table
| Vehicle / Series | Engine | Year Range* | OEM ECU Part Numbers | Notes / Remarks |
|---|---|---|---|---|
| Toyota Alphard / Vellfire ANH20 / AH20 | 2.4 L (2AZ-FE / related) | ~2008 – 2015 | 89661-58170 / 275300-3844 | Confirmed in used-parts listings for 2008 Alphard units. |
| Toyota Alphard MK2 (AH20) | 2.4 L | ~2010 – 2014 | 89661-58170 | Listings for 2011 MK2 Alphard with 89661-58170 exist. |
* Year ranges are approximate. Always confirm with your vehicle’s original ECU label and part number.
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