Review on Genuine Toyota 89422-35010 Water Temperature Sensor: Precision Performance for Optimal Engine Monitoring by Jesse Francilme

This is an OEM and the stamp is visible to show. After installing it, I didn't understand the need for a washer as the one that moved away from the other sensor must have fallen off. After installing a new sensor, my car leaked a fair amount of coolant due to the anti-pressure washer not being installed. I couldn't understand why, so I did a little research on the internet and found information about the need for a washing machine. I went to the parts store and bought the right one and the leak stopped! I think the seller should really mention how important it is that it does NOT include this important part. The buyer must pay attention that it must be purchased for a successful installation.