A collision sensor, a collision sensing system, and a method of mounting a collision sensor to a vehicle are disclosed herein. An embodiment of the collision sensor includes, but is not limited to, a processor and a three-axis accelerometer that is communicatively coupled with the processor. The three-axis accelerometer is configured to detect an acceleration experienced by a vehicle and to generate a signal indicative of the acceleration. The processor is configured to obtain the signal from the three-axis accelerometer and to determine when the vehicle has experienced a collision based, at least in part, on the signal.