Prius 2011 with 120k. It worked for a while and then started overheating after 7 months and 10,000 miles. I thought it was the thermostat as the water pump had just been replaced and the bottom hose wasn't hot. Replaced thermostat, same problem, still hot. After removing the water pump, I found that the ceramic inside was cracked. Should have bought an OEM. 2 stars as it helped me for a while you would think they would last longer.