Front Air Bag Sensor Control problems of the 2015 Jeep Renegade

The passenger seat will not always activate the airbag sensor when a person is seated, it will activate when a lunch bag is placed on it. The seat belt alarm on the passenger front seat does not always work. The vehicle under normal speeds have been alerting that the vehicle is overheating and slows down attempting to shut the engine off causing the danger of a crash to possibly happen. The dealership is unable to replicate any of the issues described, and has stated that the passenger must gain weight to activate the sensor.