Hello,
The oxygen sensors are located on the exhaust pipe right after the exhaust manifold (see diagram below).
These can be changed very easily using a oxygen sensor socket. It is a good idea to use penetrating oil before removal of the sensors as they are likely seized on the exhaust.
Here is a helpful article:
https://www.2carpros.com/articles/how-to-replace-an-oxygen-sensor
I have attached diagrams for your reference.
Please let me know if you have any questions.
Thank you.
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Thursday, October 28th, 2021 AT 9:11 PM