Which is a better thermostat? My engine's running cool, and the tstat looks pretty old, so I'm wondering if it's stuck open. Should this throw any codes?

__________________
Motivation can change what you do, but inspiration can change who you are.
---------------------------------------------------------
2003 BMW X5 3.0i, Black Sapphire, 287,423 km and kicking!
www.sam-medina.com
My online graphic novel: