Shobo
New Member
- Joined
- September 20, 2017
- Messages
- 2
- Reaction score
- 0
- City, State
- Nampa, ID
- Year, Model & Trim Level
- 2003 Explorer 4.0L
Hi everyone! I’m going to attempt to replace the O2 sensors on my sister-in-law’s ‘03 Explorer 4.0L. The dealership used a code reader and advised that the bank 1 & 2 O2 sensors were bad. I don’t have the code. I’m wondering if those are upstream sensors or downstream? Also, I have never replaced an O2 sensor, do I need any special tools? Thanks!