Hi,
On the 2.4L there is only one. (See pic 1) it is located under the exhaust manifold. It does require the removal of the manifold to access it.
If you look at pics 2 and 3, they explain how to replace the knock sensor. The remaining pics are the directions for removing the exhaust manifold. Installation is the reverse of the removal process.
I hope this helps. Let me know how this turns out or if you have other questions.
Take care,
Joe
See pics below.
Images (Click to enlarge)
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Tuesday, June 7th, 2022 AT 8:59 PM