Step 1

  Make sure the transmission is in park (for cars with automatic transmissions).

  Step 2

  Set the parking brake to prevent the car from rolling farther against the curb.

  Step 3

  Pull hard on the steering wheel while turning it in both directions. If this doesn't free the wheel, move on to step 4.

  Step 4

  Release the parking brake and put the transmission in neutral. Let up on the foot pedal just enough to rock the car slightly.

  Step 5

  Turn the steering wheel again. The key should turn now.