Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
Promoted
NISSAN Techs - How many oxygen sensors are there in a 2000 Infiniti G20?
Can you replace just one or do you have to replace all.
2 Answers
Relevance
- 1 decade agoFavorite Answer
2. One pre cat and one post cat. You should be ok replacing the one that fails. Both only if the car has over 70k miles and they have never been replaced.
Source(s): I'm an infiniti tech - 1 decade ago
there are two sensors 1 upstream o2 sensor and 1 downstream o2 the only time you might replace 2 o2 sensors if vehicle has tsb that instructs you to do so ....
Source(s): nissan/infiniti tech
Still have questions? Get your answers by asking now.