Just bought a pair from amazon and they have 3 slits, unlike OEM, which I've been warned about from a few people. It seems like older posts about them say they're fine and newer posts are usually from people diagnosing potential o2 issues. Has anyone been able to figure this out? Like maybe Bosch combined part numbers or something?
Follow Ups
Is there a consensus opinion on Bosch 13091 O2s? - Danny(Austin)16:24:31 06/14/13