Q: Car won't start on 2008 Dodge Caliber

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
No problems over last 4 years. Battery is 3 years old. Last night turned key and nothing. Battery is 12v all electrical components check out 100%. 74xxx when I bought it, now has 135xxx. Starter? Ignition switch? Spark plugs?
(2) Answers
The battery being 12 volts means nothing. It doesn't indicate it can handle the load of a starter. Start testing the battery for the ability to hold a load. Then check for starter draw to see if it is excessive. Check battery cabling, fuses and relays. Don't even think of spark plugs until the engine even cranks.