Toyota Yaris: Trailer towing (except 3-door models for Canada)
Toyota does not recommend towing a trailer with your vehicle. Toyota also does not recommend the installation of a tow hitch or the use of a tow hitch carrier for a wheelchair, scooter, bicycle, etc. Your vehicle is not designed for trailer towing or for the use of tow hitch mounted carriers.

Winter driving tips
Carry out the necessary preparations and inspections before driving the vehicle
in winter. Always drive the vehicle in a manner appropriate to the prevailing weather
conditions.
■ Pre-winte ...
Trailer towing (3-door models for Canada)
Your vehicle is designed primarily as a passenger carrying vehicle. Towing
a trailer will have an adverse effect on handling, performance, braking, durability,
and fuel consumption. For your safet ...
See also:
Installation of a mobile two-way radio system
As the installation of a mobile two-way radio system in your vehicle could affect
electronic systems such as multiport fuel injection system/sequential multiport
fuel injection system, electronic ...
Front passenger occupant classification system
Your vehicle is equipped with a front passenger occupant classification system.
This system detects the conditions.
Based on these conditions, the systems below are activated or deactivated: Front
...
Items to initialize
The following items must be initialized for normal system operation after
such cases as the battery being reconnected, or maintenance being performed on the
vehicle:
...