Kia Sedona: Battery replacement
A smart key battery should last for several years, but if the smart key is not working properly, try replacing the battery with a new one. If you are unsure how to use your smart key or replace the battery, contact an authorized Kia dealer.
1. Remove the mechanical key.
2. Pry open the rear cover.
3. Replace the battery with a new battery (CR2032). When replacing the battery, make sure the battery position.
4. Install the battery in the reverse order of removal.

Smart key precautions
Smart key immobilizer systemSmart Tailgate Latch Repair procedures
Removal
1.
Disconnect the negative (-) battery terminal.
2.
Remove the tail gate trim.
(Refer to Body - "Tail Gate Trim")
3.
Disconnect the smart tailgate latch and PCU assembly connector ...
Rear Alignment Repair procedures
Rear wheel alignment
When using a commercially available computerized wheel
alignment equipment to inspect the rear wheel alignment, always position
the vehicle on ...