i previously replaced my 2 front 02 sensors...now the rear one has gone bad. i am checking out what they have at www.oxygensensors.com and they have a set of different prices for different brands. bosch is the most expensive...does that mean they are the best for 02 sensors??? does it really matter???

 

well im not sure about other brands...I know for the KS that OEM is very important...I always go with OEM

 

I just replaced my Front 2 sensors with the Walker brand. Runs better than ever!!

 

I have a Walker for the rear, no problems yet.

 

i have 2 bad o2 sensors:

bank 2 sensor 1
bank 1 sensor 2

wich ones are these are they in the front or back?