I can't recall any discussions regarding changing the oxygen sensors. I remember years ago changing the sensor (only one at that time) on a Chevy which seemed to make a favorable difference and changing a sensor on a Mazda 626 which was indifferent. Both had around 150,000 miles.
My LGT is coming up on 125,000 and I'm wondering if I should change them out now or wait for a code. Anyone have experience with this? How difficult is the access? Will I need a breaker bar and extension to get them loosened? The PB Blaster is ready for the job.
AutoZone carries Bosch and Denso, both claiming "exact fit" (I'm not a fan of soldering and wrapping sensor wires under the car). The cost for Bosch is around $267, for Denso $211. Anyone have a preference based on quality etc.? Thanks for any comments.