As of lately, I’ve notice the engine in my 2012 Dodge Avenger has seem to have gotten weaker, especially when accelerating. The car is at 125,000 miles and I’ve had it for 5 years and haven’t had my spark plugs changed from what I remember. I have no clue when they were replaced last so I was looking to replace them myself. The issue is, when shopping around, I don’t really know what is the correct stuff to buy. How do I know what the correct spark plugs would be for my vehicle? Where should I buy them once I find out (autozone, Amazon, other?) and what other tools would I need to do this myself? Thank you!