Kia Optima Hybrid 2017 Owner's Manual page 556

ENGINE COMPARTMENT
1. Engine coolant reservoir
Gasoline Engine (Nu 2.0L - GDI)
2. Engine oil filler cap
3. Engine oil dipstick
4. Brake fluid reservoir
5. Air cleaner
6. Fuse box
7. Inverter coolant reservoir
8. Radiator cap
9. Windshield washer fluid reservoir
9
The actual engine room in the vehicle may differ from the illustration.
9-03