You for sure need an O2 sensor socket and thread paste. You can always cut the harness shorter if you want, but you can't cut it longer.Īs always, there are tools and supplies you need to do the job that you might not have. When cutting the connector off the old sensor, cut it close to the sensor so you have a long harness. It can be used as the upstream or downstream sensors. Seriously, it's not hard.ĭenso 234-4209 Universal Oxygen Sensor (Air and Fuel Ratio Sensor)Īpprox.

They're functionally identical to OEM sensors, they're much cheaper, but they do require some fiddling.īelow are links to the 2 OEM sensors you need if you don't want to splice, as well as a link to the Universal sensor if you're prepared to tackle this project. If you're comfortable cutting and splicing wires, and you can cut the connector off the O2 sensors you're replacing, then use the universal sensors. The only difference is OEM sensors come with a connector and two different harness lengths, depending on if it's upstream or downstream. They cost more than universal sensors, but they're easier to install. You can get OEM (original equipment manufacturer) sensors that come with connectors and the correct cable length. I won't get in to which is better and why, but you can click here for a search on the subject. This one is called the 'downstream' sensor and has a longer harness than the other two.įorum wisdom points us to Denso instead of Bosch. The third sensor is located farther down the exhaust near the main cat.

These two sensors are identical, and are called the 'upstream' sensors. Each of the two pre-cats has a sensor associated with it located above the precat. Amazon sells our O2 sensors, Tools, & Supplies

Oe hardtop mr2 spyder