"No warrantor of a consumer product may condition his written or implied warranty of such product on the consumer's using, in connection with such product, any article or service (other than article or service provided without charge under the terms of the warranty) which is identified by brand, trade or corporate name; except that the prohibition of this subsection may be waived by the commission if - (1) the warrantor satisfies the commission that the warranted product will function properly only if the article or service so identified is used in connection with the warranted product, and (2) the commission finds that such a waiver is in the public interest."

"Manufacturers cannot require consumers to buy parts or services from a particular company to meet warranty requirements, except under rare conditions," said Charles Tupper, policy adviser for the Automotive Oil Change Association (AOCA). "If a consumer is told only the original equipment filter will not void the warranty, that person should request that the OE filter be supplied free of charge. If that individual is charged for the filter, the manufacturer is violating Magnuson-Moss."