Do the airbags and seatbealt deploy in a accident if you dont apply brakes?

There are computer and safety interlocks that generally prevent cars from starting after the airbags deploy. Some cars have explosive bolts that also fire to disconnect the battery and fuel pump after an airbag deployment. These are all meant to limit damage in an accident. I suggest you take the car on a flatbed truck to a dealer or mechanic.

Speed....point of impact.....all make a difference on when an airbag deploys it is possible to have an accident and the airbag will not deploy the sensors have to register an impact of certain size and weight to deploy .....in older cars you are probably glad they did not deploy because they often blacked eyes broke noses and caused Neck injury by the amount of force they deployed at..
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If this is the Air Bag fault light, then have your vehicle checked out and repaired for a failure in the airbag system. Your air bags may not deploy in an accident if you don't get it fixed. When you start your vehicle, the computer checks for the presence of an undeployed airbag. If it doesn't see an airbag it will turn on the light. This could be something as simple as a poor connection. If your planning on driving your can after an airbag deployment, this may be a legal issue, depending on where you live. Legal issues would also apply if your trying to sell a rebuilt auto, without airbags.

They didn't deploy cause you hit a deer, the airbags sensors need to get a gforce reading to deploy, hitting a deer ksnt enough to do it

The airbag technology uses many factors when deploying. If it doesn't see the need, they won't pop out at you possibly injuring you more than the small accident. When I was clipped on my rear corner and spun me around in the intersection, they didn't pop. But a head first hit popped them. The primary sensor is behind the front bumper

There is a manufacturer's recall on this if it's caused by a failure in the front passenger weight detection system.

The system has a minimum weight required in the front passenger seat for the airbag to deploy in an accident (if no one is in the front passenger seat during an accident, the airbag does NOT deploy). If the system fails and the car cannot determine if someone is in the front passenger seat, the light illuminates and in an accident the passenger airbag WILL deploy, even if there's no one in that seat.

The purpose of the system is to prevent airbag deployment for a lightweight child in the front seat. The fix is to replace the seat weight sensor mat...free if it's the recall item.

in the U.S. the airbags are programmed to deploy @ 9mph(roughly the same as hitting a kerb hard.)so if the airbag went off you would not know if you hit a pothole, unless you went back to look....dont know any makers airbags that have recalls applied to them.
think of the litigation if there were...........

The light should go out after you replace the sensor that should be in the front of the vehicle.You can check the fuse for the horn. However, some of the airbags that don't come from a dealers, don't deploy, but there is no way of knowing that until you are in an accident.

If the airbags deployed. I would be looking for a new vehicle. Was it in an accident? Was it starting when the airbags deployed?

If this was a reportable accident, your insurance company should take care of the air bag and consequencial damages. Bypassing safety devices as such creates greater risk of severe injury because the rest of the vehicle is designed with all systems functional. Ck w/ insurance co.