skid plate /02 sensor after the cat
 

2002 x5 3.0i need a price on these items. thanks

im sending you a pm

how many 02 sensors are on the 01 x5 3.0 ???? (and does it make i difference if the 02 sensor is oem or not , I usually by oem but i will listen to any suggestions , the ones i have are not showing bad but , the loss of my gas milage is killing me since i did the oil seperator, i went from getting 21-23 mpg too 14.69 -16mpg . i am taking a guess that when the srporator went and i was blowing oil out the exhaust that something happened to the 02 sensors , if this has happened to someone let me know how you made out