Idaho Statutes TITLE 49
MOTOR VEHICLES
CHAPTER 9
VEHICLE EQUIPMENT
49-959. AIR-CONDITIONING EQUIPMENT. (1) Air-conditioning equipment shall
be manufactured, installed and maintained with due regard for the safety of
the occupants of the vehicle and the public and shall not contain any
refrigerant which is toxic to persons or which is flammable at or below one
thousand degrees (1000º) Fahrenheit.
(2) No person shall have for sale, offer for sale, sell or equip any
motor vehicle with any air-conditioning equipment unless it complies with
the requirements of this section.
(3) No person shall operate on any highway any motor vehicle equipped
with any air-conditioning equipment unless the equipment complies with the
requirements of this section.

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Dale
'67 Volvo 122
'79 Rabbit Diesel
'79 M-B 300TD
'82 M-B 300D
'83 M-B 300CD
'85 M-B 300TD
'86 Isuzu P'up TD
and a couple of Hondas