Drive carefully off-road because your vehicle may be damaged by rocks of roots of trees. Become familiar with the off-road conditions where you are going to drive before you begin driving.
Kia Niro 2017 (DE HEV) Service Manual: Filler-Neck Assembly Repair procedures
Removal
1.
Open the fuel filler door.
2.
Switch "OFF" the ignition and disconnect the negative (-) terminal of
the auxiliary 12V battery.
3.
Remove the filler-neck assembly mounting bolt (A).
...
Kia Niro 2017 (DE HEV) Service Manual: Exhaust Heat Recovery System(EHRS) Description and operation
Description and Operation
During cold start or in winter, the fuel efficiency can be improved by heating
up the coolant with the exhaust gas heat discharged after combusting the engine.
When the engine has been sufficiently warmed up, the valve on the passage of exhaust
gas is ope ...