General Motors announced changes to the Chevrolet Volt’s design after a NHTSA investigation into why a Volt caught fire following crash testing.
The changes will go into effect once production restarts at the Hamtramck, Michigan facility, but customer cars already sold will follow a different protocol.
Starting in February, GM will initiate a “voluntary customer satisfaction program” to make the necessary changes to the Volt. According to GM’s Rob Peterson said that formal recalsl must be initiated by NHTSA, and their lack of movement prompted GM to enact a voluntary one instead.
The fix involves changes to the Volt’s battery pack housing, as well as a coolant temperature sensor and a special bracket to prevent overfilling. The previous system allowed the battery housing to be punctured, which then resulted in coolant overflowing onto a circuit board causing an electrical short. The short was determined to be the cause of the fire.