how easy is this to change ?? i have a 93 wrx. getting fault code 32, car is running very rich to the point i can even smell petrol inside the car now and it wont boost over 0.5 bar so im guessing the sensor has had it, i have no idea what it looks like altho im guessing it will look abit like a temp sender or something... if anyone can give any advice on changing or picture of where it is and what it looks like id be grateful

cheers guys

 

A faulty Lambda sensor won't cause the problem you are having....I would be looking for a boost leak , possibly the gasket under the topmount or a split intake hose between the MAF and the turbo....

 

would that make it run rich, also get black/grey smoke sometimes on full boost