<human>:  How to install a car stereo?
<bot>: 
1. Determine the size of the stereo you need. Some cars need a single-DIN model and some need a double-DIN model.
2. Check the wiring in the car. If it is a double-DIN stereo, you may need to modify the wiring, so make sure you're aware of any potential complications.
3.Disconnect the negative battery cable from the car battery to prevent electrical shock.
4. Remove the existing stereo from the car. For most cars, this requires removing screws and prying the stereo out of the dashboard.
5. Connect the replacement stereo to the car wiring using the connector that came with the new stereo.
6. Secure the new stereo to the car dashboard with its mounting bracket.
7. Connect the negative battery cable back to the car battery.
8.Test the stereo to make sure it's functioning properly.