Judging by the number of posts on gearbox and clutch issues, and the lack of posts on auto box issues, I'd think it's very reliable. I believe it's made by Aisin-Warner, and their boxes are used in huge numbers in North America (where very few drive a "stick"). Mine never misses a beat. I'd say that, provided the fluid is clean and the box does not overheat, it will probably outlast the car.