My uncles 2004 Tundra with the 4.7 V8, which he bought new, has 381,269 miles as of tonight. Its been pretty [censored] reliable, original coolant, water pump, starter, alternator, spark plugs and tranny fluid. Lets just say he lacks when it comes to maintenance, but he does change his oil regularly and air filter. The problem is, and I've told him many times, is that he has 381,269 on the original timing belt. Could it snap at any moment? I figured if something catastrophic happens to the engine, he got his moneys worth over the past 11 years, so I quit telling him that he needs to change it.