Hi there,
Can anyone tell me where the O2 sensors are located in 2003 Land Rover Discovery? It looks like I have to change all 4 of them. How difficult is the job? 1 hour job or 6 hour job? Is access from top or under side?
Pretty dum questions, huh? Sorry!
Thanks a lot!
Bob

 

there are 4 oxygen sensors. One before the catalytic converter and one after on the left and right sides of your exhaust system.

 

If you are a little mechanical, they are easy to do. Why do you think you need to change them.
Rover Connection has one of the better prices on them at about $65.