My mechanic tells me that the thermostat on my '99 9-3 needs to be replaced and I'd like to do it myself. Has anyone used a NAPA aftermarket thermostat (made by Stant) instead of a Saab thermostat? NAPA assures me it's made to OEM specs but I don't want to do the work and have it fail. Maybe I'm over thinking this? Paralysis by analysis! :o