The tongue load of any trailer is an important weight to measure because it affects the total gross vehicle weight (GVW) of your vehicle. This weight includes the curb weight of the vehicle, any cargo you may carry in it, and the people who will be riding in the vehicle. And if you will tow a trailer, you must add the tongue load to the GVW because your vehicle will also be carrying that weight.
The trailer tongue should weigh a maximum of 10% of the total loaded trailer weight, within the limits of the maximum permissible trailer tongue load. After you've loaded your trailer, weigh the trailer and then the tongue, separately, to see if the weights are proper. If they aren’t, you may be able to correct them simply by moving some items around in the trailer.
WARNING - Trailer
✽ NOTICE
With increasing altitude the engine performance decreases. From 1,000m above sea level and for every 1,000m thereafter 10% of vehicle/trailer weight (trailer weighter + gross vehicle weight) must be deducted.
Kia Niro 2017 (DE HEV) Service Manual: Tailgate Assembly Repair procedures
Replacement
Wear gloves to protect hands from injury.
Work in a group of two when removing and installing the tailgate.
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Kia Niro 2017 (DE HEV) Service Manual: Driver Airbag (DAB) Module and Clock Spring Repair procedures
Inspection
Air bag module
If any improper parts are found during the following inspection, replace the
airbag module with a new one.
Never attempt to measure the circuit resistance of the airbag module
(squib ...