Ok so first let me say i absolutely love my Tundra. I purchased it brand new at the very end of April this year.. fast forward to now, not even 3 months of ownership and right at 7300 miles on the odo. I have gradually noticed the coolant in the reservoir tank get lower and lower and i started smelling coolant. Look all around no leaks anywhere. Today i take it in, sit in the waiting room for 3 hours until someone comes for me to talk about the issue. Well, they say it has an internal coolant leak somewhere and the master tech and shop manager need to keep it so investigate it further. Hopefully Wednesday i'll get an update on the issue, fingers crossed for nothing major. For information purposes, its a 5.7 Crew Max TRD 4x4.