Kia Optima: Chassis / Brake/Clutch Fluid
Repair procedures
Check the brake fluid level in the brake fluid reservoir. The level should be
between “MIN” and “MAX” marks on the side of the reservoir.

Use only hydraulic brake fluid conforming to DOT 4 specification.
Check the brake system for any leakage if the fluid level is extremely low (lower
than MIN).
Repair procedures
Inspection
Visually check for proper installation, chafing, cracks, deterioration and any
leakage.
Replace any deteriorated or damaged parts immediately. ...
Other information:
Schematic diagrams
Connector and Terminal function
Pin
Function
1
Ground
2
LED charging lamp (Green)
3
LED charging lamp (Amber)
4
-
...
Specifications
Specifications
Smart Key Unit
Items
Specification
Rated voltage
DC 12 V
Operation voltage
DC 9 - 16 V
Operation temperature
-40 to 185°F (-40 to 85°C)
...