Well mine was STAR'd last week and guy said my 02 sensor is not working properly anymore and needs replacing(my avg MPG is 31 now). How hard a job is it coz I know it's attached to the exhaust near the gearbox right and its a case of unplugging and unscrewing it and put in the new one.Could I do this myself coz iv lots of experience with my car with servicing etc or does it need a specialist.found a Bosch one on EPC for £100 odd
