Kia Optima: Evaporative Emission Control System / Fuel Filler Cap
Description and operation
A ratchet tightening device on the threaded fuel filler cap reduces the chances
of incorrect installation, which would seal the fuel filler. After the gasket on
the fuel filler cap and the filler neck flange contact each other, the ratchet produces
a loud clicking noise indicating the seal has been set.

Repair procedures
Removal
1.
Disconnect the negative (-) battery cable.
2.
Remove the stabilizer bar bushing (A).
Tightening ...
Repair procedures
Removal
1.
Disconnect the negative battery (-) terminal.
2.
Remove the [LH] rear wheel guard.
(Refer to Body - "Rear Whee ...
Other information:
Repair procedures
Removal
Interior Antenna 1
1.
Disconnect the negative battery terminal.
2.
Remove the surround view monitor (SVM) unit.
(Refer to Advanced Driver Assistance System (ADAS) - "Surround View Monitor
(SVM) Unit")
...
To install a LATCH-compatible child restraint in either of the rear outboard
seating positions: 1. Move the seat belt buckle away from the lower anchors.
2. Move any other objects away from the anchors that could prevent a secure connection
between the child restraint and the lower anchors.
3. ...