Source
Emily Glazer and Gretchen Morgenson | The Wall Street Journal

While many consumers choose to buy aftermarket products, they’ve also generated complaints. “Each of these products is very expensive—if you finance them through the dealership they’re marked up 100% to 150%,” said Delvin Davis, senior research associate at the Center for Responsible Lending, a nonprofit focusing on consumer finance. “A lot of times the products are put into the contract without consumers’ full knowledge and consent.”

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