A properly functioning thermostat regulates engine temperature, allowing the ECU to maximize fuel economy and performance, while minimizing tailpipe emissions. It also ensures that the air coming out of your vents in the winter gets hot enough to keep you comfortable.
This particular thermostat from OEM supplier Vernet includes the o-ring, and operates between 87-102°C.
When you replace the thermostat, you will lose a considerable amount of coolant, and the thermostat housing will likely be brittle and prone to cracking or warping. So while you’re here, we recommend that you add a thermostat housing and a jug of OEM coolant to your order.