95 O2 Sensor

[m3f_M3ismycupo_3c8ab52df2]

I was wondering: how many O2 sensor does a 95 M3 has? the code is 1221 and someone told me it has 2 sensor but some say it takes only 1. Thanks

[m3f_Sirius_880bd69485]

They have two, one per bank.

[m3f_M3ismycupo_3c8ab52df2]

Are you sure about that????

it is a 1995 with a 3.0 .. I only see one!!



thanks

[m3f_Sirius_880bd69485]

Doh. I stand corrected. I thought they had two. One before and after the cats.



http://www.realoem.com/bmw/showparts.do?model=BF93&mospid=47486&prod=19951200 &btnr=18_0177&hg=18&fg=10&PHPSESSID=6645f00858fa6f 473e58f6886873ed7d

[m3f_M3ismycupo_3c8ab52df2]

thanks a lot. It is way over priced on that link you showed tho. I got it for $106 from Pelican Parts. Also I have a question: after replacing the O2 sensor, does the check eng. light reset itself or do I need to disconnect the batt.?

[m3f_Supabimma_cc72c2aa80]

try the cleaning method... get QD electronic cleaner and spray the 02 sensor and it may get rid of your check engine. it did for a few other people. I sprayed mine and car is already more responsive. hope that helps

[m3f_genner21_b0df9c1cac]

after you replace it the light will go off. I got my o2 sensor for 80 bucks. Look aroung man.

[m3f_Supabimma_cc72c2aa80]

after you replace it the light will go off. I got my o2 sensor for 80 bucks. Look aroung man.



did you notice any difference in performance?