well they haven't been changed since new (09 plate) and i have done 21500 miles and she is due a service. I do quite alot of stop start driving which doesnt help. I will change the spark plugs and give her a service hopefully that cures the problem.
Just for the record, what did yours actually fail on? mine failed on the fast idle test in every way C02 went 4.2% hydro carbons went 337ppm and lambda test failed aswell. Not looking good lol.
