The Crash Data Retrieval (CDR) System downloads both pre and post crash data from the Sensing and Diagnostic Module (SDM) which is part of the vehicle's airbag system. It also records information on "near-deployment" events such as impacts that are not severe enough to deploy the airbag(s). These events are common in "low speed" crashes, which often result in litigation for soft tissue injuries.

Some of the data that can be retrieved include: Vehicle's speed five seconds prior to impact Brake Status Throttle Position Engine RPM Passenger's airbag enabled or disabled state State of driver's seat belt switch

SDM removed from a GM vehicle

This data is currently available on select vehicles dating back to 1996. Contact Felicella Consulting Engineers, Inc. for the latest update on the specific models and years available.