as long as you follow maintenance schedule and car is running without issues it may never need any engine work. if you have issues with it you should probably have it checked out.
i heard only till 90,000 to 110,000 miles at the most
average life of a 3.1 v6 with proper oil changes and tuneups lasts about 160,000 miles according to common reviews on engine life
The goal is typically to make a million miles before needing an engine overhaul. However, after being overhauled multiple times, some trucks have logged multiple millions of miles.
Most gas engine cars can easily reach 200k+ miles if properly maintaned before needing major reconditioning. Diesel engine cars can probably double that, the motor anyway.
Depends on which engine/transmission it has installed which you failed to list.
It depends on the miles( highway vs. city), how well its maintained and driven. Most vehicles should last (engine)175,000 - 250,000 miles before needing rebuild. The transmission(automatic) 100,000-150,000.
While the age depends on how well the truck has been maintained, Toyota trucks can often go for 250,000 miles before needing a new engine.
Depending on the year Metros usually lasted between 180,000 miles and 250,000 miles. 1989 - 1997 metros usually go up to 180,000 before needing major repair. 1998 - 2001 were not as good and usually went up to 130,000 before needing work done. It all depends how the car was treated. They are good cars for the price.
a million miles
Depends on how you take care of it. Most I have heard is 300k.
The average Toyota Sienna gets just under 100,000 miles. It typically will receive around 97,000 miles before needing major repairs.
I have a friend with 170,000 miles and he still drives it daily, I have another friend replacing his engine at 50,000 miles.