Kia Optima: Fuel Filler Cap. Description and OperationDescription
A ratchet tightening device on the threaded fuel filler cap reduces the chances of incorrect installation, which seals 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.

InstallationIntake Manifold. Components and Components Location
Components
1. Intake manifold assembly
2. Electronic throttle body
3. Intake manifold stay
4. Intake manifold gasket
...
Removal
Parking Assist Sensor
1.
Disconnect the negative (-) battery
terminal.
2.
Remove the rear bumper.(Refer
to the BD group - "Rear bumper")
3.
...
Power Windows
The ignition switch must be in the ON position for power windows to operate.
Each door has a power window switch that controls that door’s window. However, the
driver has a power window switch w ...