Review on Enhance Land Rover Discovery Performance with MOSTPLUS Male O2 Oxygen Sensor Set (234-4694 234-4696) - Compatible with 99-04 Models - Set of 4 by Ricardo Mercado

Other reviewers have indicated that the two upstream sensors need modification to work (US Disco 2 4.6L V8). The signal wire and ground wire are on the wrong pins and the connectors are on the wrong end (male, female required). To use the sensors upstream it is necessary to cut the plastic connector and connect the wires in the right position. So cut the old connector off the old sensor and connect the new sensor to the old orange plastic connector. Make sure the black and gray wires are in the correct position. Pay attention to the color code of the wiring on the sensor cable - the color of the wiring on the main harness above the connector is different. Upstream sensors have large ridges on the sensor tip. Pros: Inexpensive. About 1/8 the cost of Bosch as I write (2020) Works when modified as above. Cons: Wiring errors are a big problem. Buyers be careful. It's cheap and works if you don't mind modifying it, but takes a lot longer than installing the right part.