That's why Nissan state in the manual to idle car if car has been under load (turbo squirts) for a minute or so. But if you don't do this, well you can just fork out for new NISSAN bits, which they are more than happy to supply you with.
Think about it, turbo timers must have a legit purpose. Otherwise there wouldn't be so many reputable brands manufacturing them, and people buying them the world over.