how often do you change your o2 sensors, plugs and plug wires? i have 53 k on my ranger and i was wonderin if they need changing. idk when/if it was ever done before, got the truck from a dealer who got the truck as a trade-in. thanks

 

I changed my plugs at 60, will change the wires at 90, and wonder the same thing about the O2 sensors.

 

I changed my factory plugs,wires, and 02's at 85K.

I would change the 02's around 75-90K and forget about them.

 

How many of them are there, and where are they?

 

I believe on my '01 4.0L, there's two...possibly 3.

 

Plugs And Wires @ 50k

 

Thier life expectancy is generally 100k miles.

Rich