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I've been getting very intermittent yellow check engine lights on my 3.0si for a while now (like once every 2 months), which go away for quite some time after clearing codes. The fault codes I get have to do with the pre and post cat lambda sensors.
So I've decided to finally replace them, given the noted faults, the mileage on the car (around 110k miles), and my suspicion they've never been replaced before. I've figured out I need two sensors before the cat, and 2 sensors after the cat, and have so far decided on Bosch sensors.
Question is, before I order them, can anyone confirm the below sensors are the ones I actually need to replace the whole set?
Pre cat
BOSCH 0 258 017 100
BOSCH 0 258 017 098
Post cat
BOSCH 0 258 006 755
BOSCH 0 258 986 602
Thanks!