1. The fuel filler lid must be opened from inside the vehicle by pushing the fuel filler lid opener.
✽ NOTICE
If the fuel filler lid does not open because ice has formed around it, tap lightly or push on the lid to break the ice and release the lid. Do not pry on the lid. If necessary, spray around the lid with an approved de-icer fluid (do not use radiator anti-freeze) or move the vehicle to a warm place and allow the ice to melt.
2. Pull the fuel filler lid (1) out to fully open.
3. To remove the fuel tank cap (2), turn it counterclockwise. You may hear a hissing noise as the pressure inside the tank equalizes.
4. Place the cap on the fuel filler lid.
Kia Niro 2017 (DE HEV) Service Manual: Fuel Tank Repair procedures
Removal
1.
Switch "OFF" the ignition and disconnect the negative (-) battery terminal.
2.
Remove the rear seat cushion.
(Refer to Body - "Rear Seat Assembly")
3.
Fuel pump service cover (A).
...
Kia Niro (DE HEV) Owners Manual: Engine coolant
Check the condition and connections of all cooling system hoses and heater hoses.
Replace any swollen or deteriorated hoses.
The coolant level should be filled between MAX and MIN marks on the side of the
coolant reservoir when the engine is cool.
If the coolant level is low, add enough spec ...