If the side repeater lamp (LED type) does not operate, we recommend that you checked an authorized Kia dealer.
Kia Niro 2017 (DE HEV) Service Manual: Refrigerant Line Repair procedures
Replacement
1.
Discharge refrigerant from refrigeration system.
2.
Replace faulty tube or hose.
Cap the open fittings immediately to keep moisture o ...
Kia Niro (DE HEV) Owners Manual: Use high quality ethylene glycol coolant
Your vehicle is delivered with high quality ethylene glycol coolant in the cooling
system. It is the only type of coolant that should be used because it helps prevent
corrosion in the cooling system, lubricates the water pump and prevents freezing.
Be sure to replace or replenish your coolant ...