The water pump is a known failure point on most BMWs, new and old. Sometimes it's best to completely service this area. Here you'll find water pump service kits!
Rein Water Pump Service Kit for the N20 engine, an OE replacement set for the water pump and thermostat. It targets failure of the plastic flange on the coolant hose, and the thermostat hose uses an aluminum flange instead. The water pump and thermostat are OEM parts, and OE or Pentosin NF-G11 coolant is recommended for the refill.
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