Review on 🔧 Grey Denso 234-9009 Oxygen Sensor by Eric Power

According to a very knowledgeable person at Denso, the 234-9007 and 234-9009 are identical sensors but with different cable lengths. 234-9009 has 14" lines and 234-9007 has 11" lines. In many Toyota applications (California-legal vehicles) that have used these sensors on the B1S1 and B2S1, they can be used interchangeably provided care is taken to drag clothing away from a nearby hot manifold. Having the right tool is important for those planning to replace the B1S1, as the space between the firewall and the engine is very narrow and the force required to unscrew the sensor from the manifold is high. Advance Auto Parts in the Midwest will lend you the tool or sell it for less than $30. The tool is like an open-end wrench with a slot cut in it to remove the wire harness. Long live the 1st generation Toyota Avalon.