Hi folks, front lambda sensor knackered. Have read various things to no avail. The most recent being trying soaking it in vinegar, waste of time and vinegar.

Is there an alternative to buying a new new one at £90? I've seen some advertised that you can cut the sensor at the cable and solder on a new one which is a much cheaper option, but these were 3/4 wire and mine says that it is a 5 wire one. Any suggestions welcomed (unless it's buying the new one which I already know is an option lol).