The body structure of the BMW i8 is made of carbon fiber-reinforced plastic (CFRP). Most extrication tools will cut thru carbon fiber without an issue. Carbon fiber is used in the racing industry and raceway rescue team successfully extricate drivers with the same tools we carry on our rescue vehicles.
Rescuers should cover any occupants prior to cutting carbon fiber and wear proper PPE. Per OSHA, dust or vapor from heated products may cause irritation of the eyes, nose, and throat. Skin and respiratory irritation, contact dermatitis (chronic interstitial lung disease) OSHA
BMW wrote a detailed Rescue Guide for us that is packed full of great information. In this guide, rescuers are reminded that rescue operation can be carried out using standard tools and is almost identical to that for conventional vehicles.
The BMW i8 is a hybrid electric vehicle. Take a quick look at the screen grab from the rescue guides that shows the location of the high voltage battery and other systems used in this hybrid vehicle.