Illinois lemon laws Hopefully this will shed a little light on the subject... specifically:
If after a reasonable number of attempts the seller is unable to conform the new vehicle to any of its applicable express warranties, the manufacturer shall either provide the consumer with a new vehicle of like model line, if available, or otherwise a comparable motor vehicle as a replacement, or accept the return of the vehicle from the consumer and refund to the consumer the full purchase price or lease cost of the new vehicle, including all collateral charges, less a reasonable allowance for consumer use of the vehicle.