This URD Rear O2 Sim has been redesigned. It is now a full Plug-N-Play design and takes under a minute to install.
Note- does not fit the 2010+ FJ Cruiser or 2010+ 4Runner V6.
Does not work well on the 2015 Tacoma. We recommend the UNIVERSAL version for that application.
This unit fits all Toyota vehicles that use the 1GR-FE 4.0L V6 Engine to include the FJ Cruiser, 4Runner, Tacoma, LandCruiser, Tundra, Prado, and Hilux.
Many people using their Toyota trucks in sanctioned off-road racing or rally events install an aftermarket headers, high flow catalytic converter for added performance. Some of these aftermarket high flow units seem to flow like there is no catalytic converter at all. These high flow cats or (off road) lack of a cat may cause that annoying check engine light to activate.
Our rear O2 sensor simulator is a device that conditions the signal from the rear O2 sensor and keeps that signal in the proper range the ECU is expecting to see from a properly functioning and healthy catalytic converter. Our device takes a slightly different approach than most of the other devices on the market. It is designed to work with the O2 sensor that is installed down stream of the catalytic converter. It does not replace it. The rear O2 sensor must remain in contact with the exhaust stream. This way the vehicle will looks stock. If you do a diagnostic hook up, you will see a proper signal from the rear O2 sensor.
This device may not be legal for use on pollution-controlled vehicles operated on public roads and is intended for off-road use only.
Dual Channel Units- Locate the rear O2 sensor on the passenger side of the vehicle. This will be to the rear of the catalytic converter. Follow the wire from that sensor until you locate the harness connector. Unplug the connector and plug one plug from the short harness into the O2 sensor and the other to the harness connector. Pass the long harness over the transmission and do the same on the driver’s side. Secure the control unit to the connector bracket on the side of the transmission with a wire tie.