1. Open the trunk.
2. Remove the two screws that hold the trunk lid switch in place.
3. Remove the old switch by unplugging the connector.
4. Install the new switch by plugging in the connector and securing it with the two screws.
5. Close the trunk and test the switch to make sure it is working properly.
Here are some additional tips:
* Make sure you have the right switch for your model year Sonata.
* Be careful not to drop the screws or the switch.
* If you are uncomfortable doing this repair yourself, you can take your car to a mechanic.
