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Why Mill Valley MINI Owners Should Never Ignore a Failing Radiator Expansion Tank

Posted on April 21, 2026 by masterwpuser

MINI Coopers have earned a devoted following in the Bay Area, and it’s easy to see why — they’re agile, fuel-efficient, and genuinely fun to drive on the winding roads around Mill Valley and Marin County. But beneath the charming exterior, first- and second-generation MINIs carry a known weak point: the plastic radiator expansion tank. This small but critical component…