Buick has a good quality reputation? Really? Just because Tiger Woods and Buick are often seen together in ads, doesn't mean the reputation is good. My guess with Buick's "better" reputation than other GM products like Sunfire, is because most Buick buyers are older than average. They are also driven less than average, so they might seem like more reliable than the typical Sunfire. With that in mind, minor defects are acceptable. But then what do I know, I never own a GM before. I can see the concerns and the reason behind it. It's like, if they can't get the basics right, what's the chance of them getting the more important stuff right, like all those fancy computer modules. U see, that's the risk u will have to take for owning this Buick. Buying a car is always risky, it's just a matter of how much risk. Choosing a Buick over other cars like Toyota Highlander or Honda Pilot means taking more risk. This one little defective themostat only increase that risk by a little, a far cry from the additional risk for choosing the Buick instead of the imports mentioned. Not all is lost here though. U have a good amount of warrantee to fall back on. My advice is, after 2 yrs, if there are more defects, sell the car. Learn the lesson: Japanese cars might be expensive, but u usually get what u paid for.