In the case of the crash sensors, they are generally mounted with the SRS computer under the trim panels in front and behind the driver's center shifter. However, the mounting location will vary for specific models.
There are 3-4 crash sensors installed in the SRS airbag system, mounted on the inside of the front wing panels on both sides of the body, and in the case of the crash intensity sensors, there is a crash sensor mounted on the left front and the right front of the body, which have been made into a left front crash sensor and a right front crash sensor.