Pump, Thermostat and 5L coolant = $714 shipped from ECS. Labour = $300.
It doesn't give any warnings or symptoms. You get the overheating warnings (amber followed by red) once it's dead. If the car has done about 80k, it should be changed before it fails!
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Current: 2018 M3 | individual Fire Orange
Gone: 2016 M4 | BSM
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