You could end up replacing your car sooner than you expected. It’s quite possible that you’re wearing your car down with everyday “normal” activities that you don’t think twice about. For example, not using your parking brake cuts the life of your transmission. In case you didn’t know replacing a transmission costs thousands of dollars. Leaving the radio and air conditioner on when you cut the car off is damaging to your engine. Find out how + 8 other things that decrease your car’s life by reading Top 10 Everyday Things People Do to Ruin Their Cars.