105K miles
oxygen sensor
It has a timing belt that should be changed every 60,000 miles. It is recommended that the water pump be changed with the timing belt.
The timing belt should be changed at 90,000 miles along with the water pump as the 98 and up v-8's water pumps tend to leak. www.lextechautomotivellc.com
The 2UZ-FE motor does not have a timing chain but a timing belt and it should be changed between 90k and 100k miles along with the water pump.
behind the timing belt cover
You should have the timing belt changed between 90-100K miles. When you are having the belt changed you should also change the water pump rollers. I had this done on my 2001, the total cast was $950.00
the water pump belt is your timing belt under the timing belt cover
I paid $1,200 about a year ago to have my timing belt and water pump changed.2.0.
behind the fan belts. under the timing belt cover (driven by the timing belt)
Typically about 80-90 thousand miles
should be changed at 60000 miles along with the water pump and belt tensioners
Same frequency as the timing belt, every 70-80K miles.