Denso · petrol · 1995–2026
Toyota ECU 89661-35 xxx — 4Runner / FJ Cruiser / 1995–2004 Tacoma engine ECU
4Runner (89661-35M72 on 2015–2016 4.0) and, by trade usage, the FJ Cruiser and the first-generation Tacoma. 4Runner stayed on the Gen2 unit for most of its run.
Models fitted with 89661-35
Tacoma
First generation · 1995–2004
- 2.4 / 2.7 4-cyl · 2RZ-FE, 3RZ-FE
- 3.4 V6 · 5VZ-FE
4Runner
Third and fourth generation · 1996–2009
- 2.7 4-cyl / 3.4 V6 (to 2002) · 3RZ-FE, 5VZ-FE
- 4.0 V6 / 4.7 V8 (2003–2009) · 1GR-FE, 2UZ-FE
4Runner / FJ Cruiser
Fifth-gen 4Runner (2010–2024) + FJ Cruiser (2007–2014) · 2007–2024
- 4.0 V6 · 1GR-FE
Prefix-to-application pairing checked against published parts data on 2026-10-14.
Clone the 89661-35 ECU — $350 flat
Mail your original and a donor with the same full part number. VIN, immobilizer data, coding and adaptations are copied across on the bench, typically within 24 hours of arrival. Factory immobilizer stays on.
Toyota / Lexus / Scion engine ECU cloneOn-car software step — remote Techstream, $250
Some cars still want an on-car step after a module swap — an ECU communication ID registration on a smart-key car, a calibration update, or a key registration. Plug a J2534 pass-thru interface into the car and we run the factory Techstream software on it from our bench — no dealer visit. The same session covers programming after any other Toyota or Lexus module replacement.
Book the Toyota / Lexus remote sessionFrequently asked questions
What is Toyota ECU part number 89661-35?
89661-35 is the model code of a Toyota / Lexus / Scion engine control unit in the 4Runner / FJ Cruiser / 1995–2004 Tacoma engine ECU family (Denso), common on 1995–2026 petrol cars. 4Runner (89661-35M72 on 2015–2016 4.0) and, by trade usage, the FJ Cruiser and the first-generation Tacoma. 4Runner stayed on the Gen2 unit for most of its run. The rest of the number selects the exact calibration.
Which models use a 89661-35 ECU?
In the US: Tacoma First generation (1995–2004); 4Runner Third and fourth generation (1996–2009); 4Runner / FJ Cruiser Fifth-gen 4Runner (2010–2024) + FJ Cruiser (2007–2014) (2007–2024). Always confirm with the label — the same model year can carry a different family on another engine or build.
Can you clone a 89661-35 ECU?
Yes. Mail your original 89661-35 unit and a donor with the same full part number and we copy your VIN, immobilizer data, coding and adaptations onto the donor for $350 flat, typically within 24 hours of arrival, immobilizer intact. If the car then asks for an on-car step, the remote Techstream session over J2534 is $250.