If the tires are properly balanced plug tires should not cause a vibration.
Not all Altima's vibrate. If the car is vibrating, it may mean that there is something wrong with the tires.
You will feel the car vibrate around 50-80 MPH
Yes, bad spark pugs or plug wires can cause the engine cylinder to misfire which will cause the engine to vibrate.
loud, and shety muffler
could be a broken engine mount.
FRICTION
Normal wear.
It is idling. This is hard for an engine to do smoothly.
Could be time for a tune up.
mechanic paint spark plug , I order to avoid unstable due to high vibrate.
When one drives a car with tires that are not aligned correctly, it can cause premature wear on the tires and will cause the car to start drifting uncontrollably.
You have one or more tires out of balance.