Factory Toyota one? It worked good enough for Toyota?
I just literally changed mine yesterday.
Went with OEM- housing and t-stat together- also got the OEM gasket. About $50 CAD all-in
3X 10mm nuts and one hose clamp to remove.
Easy job, burped the system, and topped up with about 1/4 jug of coolant.
Good for another 300K km LOL
Was there an issue with yours? Just wondering why you changed it or if its on the maintenance schedule.