Due to a MOT failure on emmisions I am looking to replace my Lambda sensor on my 1995 WRX import. I am not sure which one to go for as I have heard that if it has a red wire I will need to replace it with the titania senor. Is this correct or can I just replace with a universal zircona which are easier to get hold of and cheaper?

 

This is where I got mine from for my '96 WRX Import:Just Lambda, Suppliers of zirconia and titania lambda sensors by post

Not sure if its the same for yours,drop the guy an email and he'll tell you which one you need for your model,he was very helpful with me