1. Last October, Nissan extended their radiator warranty for what they called a “small percentage” of vehicles that may experience issues with coolant leaks.

    Namely, how those coolant leaks seep into the transmission and render it useless.

    While the automaker has offered an extended warranty for the radiators, the National Highway Traffic Safety Administration and other safety organizations have received numerous complaints from owners alleging they have spent thousands of dollars for transmission repairs because the added radiator warranty coverage only applied to vehicles with fewer than 80,000 miles.

    That “small percentage” appears to be on the rise, as this problem regularly tops the CarComplaints.com trending problems list.

    Because it’s an extended warranty, and not a recall, Nissan isn’t obligated to tell owners about it. And, for those who know, it isn’t exactly clear if the radiator warranty extension covers damage done to the transmission by the leaking coolant.

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