just took car in an been told the o2 sensor isnt workin properly put £10 of juice in an its nearly all gone on about 15 miles of driving as anyone had a none subaru sensor fitted dealer told me only fit genuine part

 

What year is your car?
I have just purchased a one for my 93 WRX
Its a 3 wire (red,black and white)
Wait for it £289 OOOoohhhhh!!!!!!!!

 

How Much!!!!!!!

O2 sensor - is that the lambda sensor?
If so get one from halfords at about £25-30 or off internet site called just lambda £45 - halfords by me were useless and couldnt help even though i managed to get a part number off scoobynet!!!

 

Had problems with MY98 and found out it was the O2 sensor by putting in a second hand one to try and eliminate the problem. The car was then running about 90% perfect.
Decided to buy a new one from Subaru (cost €190 Rep. Ireland) and that made all the difference. There was a difference in the number of fins in the sensor, so now much happier with the car.
Hope this helps make your mind up.

 

I think the lambda from Subaru is better than it's Halfords/Motor Factor counterpart, and will last longer. However, when you consider the huuuuge price difference, you have to question whether the one from Subaru is worth the extra money.

The cheaper ones will certainly last a fair amount of time if your car isn't massively modified. The 2 main culprits for killing the cheaper ones quickly are high EGTs and richer AFR. If you've got a full reading (0 - 1v) AFR gauge, you can monitor the health of your lambda. As it becomes less and less healthy, it will read progressively leaner and leaner, and won't flit about as much as it used to.

 

the cars ppp up soo was told £120 off the top off his head soo hopefully no more than that