Spark plugs

To replace the spark plugs should be a fairly simple job. Disconnect the coil connectors. Remove the 10mm bolts on the coils and pull them out. Remove the spark plugs with a deep spark plug socket, extension and ratchet. If you are using dealer plugs, they should be pre gapped already. If you are using another brand, using a spark plug gaper verify or adjust the gap to 1.0 - 1.1 mm (0.039 - 0.043 in) Hope information helps and if you have any other questions feel free to ask.

Those are Coil On Plug. Cylinder one is at the end of the engine where the belt is. Four is on the opposite end. See the other post for an answer.

https://www.2carpros.com/questions/ignition-coil-72227601#last

This is a four cylinder the number one coil is the one towards the front of the engine then it is number two, number three, and number four been the last one towards the back. Remove number four and number one coil and swap them. If number one now misfires then your coil is bad.

Coils are very common failure on these vehicles. Let us know how the test go and if you have any more questions do not hesitate to ask.

That car should have individual coils for each plug. Number four would be the end cylinder farthest from the belt. Easy way to test if it is the coil is to remove the number four coil, swap it with any of the others. Put it back together and see if the misfire follows the "bad" coil.