The National Highway Traffic Safety Administration has expanded an investigation into an estimated 103,107 Chevrolet Corvettes over complaints about the loss of low-beam headlights.

The vehicles were released for the 2005-2007 model years according to the NHTSA.

Complaints stated that the low-beam lights "stopped working" all at once without slowly dimming at first to let the driver know something was wrong.

"GM is continuing to cooperate with the NHTSA in its investigation," said Alan Adler, a GM spokesman, to Edmunds.

Approximately 95 complaints over the low-beam headlights have been received by the NHTSA.

Initially the NHTSA opened a preliminary evaluation based on complaints from customers, who said after driving just five to 30 minutes the low-beam headlights stopped working.

The low-beam headlights remained off during the rest of the drive according to the NHTSA.

"The loss of headlights is caused by a fractured low beam circuit wire in the underhood bussed electrical center (UBEC), an electrical assembly that is similar to a fuse box," said GM to the NHTSA.

"The UBEC is located in a high heat area near the engine and the low beam circuit wire routing within the UBEC makes it susceptible to cyclical stress caused by thermal expansion."

No crashes or fatalities have been caused by the issue as of press time. The vehicles have also not been recalled officially yet, but that could be the next course of action depending on how the NHTSA's investigation goes.

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