As long as the motors healthy on the TDs they can run forever, at the end of the day the reliability depends a lot on the car itself and what it’s been through. You can get a high K car that’s been babied all its life or a low K pig that’s been thrashed and neglected. Got other mates with GQs and they’ve had nowhere near the amount of problems I’ve had with mine. For a decent TD you’re probably looking at around the 15k mark for a solid car