Hi I have an escort rs cosworth 4x4 2.0 turbo which has been built and I'm not sure of the exact year it has a blue rocker cover and I need a lambda sensor does any know which one I need and weather it's a 3 or 4 wire sensor

Thanks in advance

 

3 wire one, burton power do them

 

Thanks are you sure on info I've given ?? Thanks for reply

 

http://shop.grahamgoode.com/lambda-s...91-59430-p.asp

 

Absolutely certain mate

 

Thanks people