Airbag deployment can happen at any speed. It's not about the speed, but rather the impact that the car feels to deploy the bags.
The force of the collision has to great enough
Yes, it is possible for an airbag not to deploy when going 35 miles per hour. If the hit was not forceful enough at that speed, it will not deploy because it could do more damage than good.
Deploy what
That depends on what you run into : If you run into a concrete wall that doesn't have any " give " , another vehicle that is parked , another vehicle that is moving towards you or in the same direction The force of the collision has to be enough to deploy the airbag(s)
typically 5 mph +
Airbag deployment is generally not done on the basis of speed: they deploy mostly when there is a sudden stop in speed which has resulted from an impact.Additional: Most aribag sensors are calibrated to activate when they sense an impact equivelant to striking something at a speed of about 30-35 MPH.
Airbags deploy at up to 300 km/hr.
Yes, an airbag will deploy at any speed. HOWEVER, it will not deploy upon just any impact, there are sensors on the vehicle that determine the force of impact, just how hard and blunt the impact was, if it is a small minimal force, then there will be no deployment, but if there was a hard impact/force, then obviously it would deploy.
The airbag will most likely not deploy on a 1996 Toyota Tacoma is the front fender is removed. The airbag sensor is designed to detected a combination of speed and impact before deploying.
The airbag is activated do to a sudden acceleration/deceleration of the vehicle. It can happen if you are sitting still.
The minimum speed set by the government for airbags to deploy is 25 mph. The 2007 PT Cruiser should have the airbags deploy at this rate of speed or less. It also depends on the type of collision, when the airbags will deploy.