California Code, Civil Code - CIV § 1795.90

(a) “Consumer” means the purchaser, other than for purposes of resale, of a motor vehicle, a lessee of a motor vehicle, any person to whom the motor vehicle is transferred during the duration of an express warranty applicable to that motor vehicle, and any person entitled by the terms of the warranty to enforce the obligations of the warranty.

(b) “Manufacturer” means any person, firm, or corporation, whether resident or nonresident, that manufactures or assembles motor vehicles for sale or distribution in this state. In the case of motor vehicles not manufactured in the United States, the term “manufacturer” shall also include any person, firm, or corporation that is engaged in the business of importing motor vehicles.

(c) “Dealer” means any person, firm, or corporation selling or agreeing to sell in this state one or more new motor vehicles under a retail agreement with a manufacturer, manufacturer branch, distributor, distributor branch, or agent of any of them.

(d) “Adjustment program” means any program or policy that expands or extends the consumer's warranty beyond its stated limit or under which a manufacturer offers to pay for all or any part of the cost of repairing, or to reimburse consumers for all or any part of the cost of repairing, any condition that may substantially affect vehicle durability, reliability, or performance, other than service provided under a safety or emission-related recall campaign. “Adjustment program” does not include ad hoc adjustments made by a manufacturer on a case-by-case basis.

(e) “Motor vehicle” means a motor vehicle, excluding motorcycles, motor homes, and off-road vehicles, which is registered in this state.

(f) “Lessee” means any person who leases a motor vehicle pursuant to a written lease which provides that the lessee is responsible for repairs to the motor vehicle.

(g) “Service bulletin” means any notice issued by a manufacturer and filed with the National Highway Traffic Safety Administration relating to vehicle durability, reliability, or performance.