It does not have a timing belt it has a chain
its a chain, never
The 4.6 or 5.4 Triton engine has two timing chains.....not belts. Periodic changing isn't necessary like it is with a belt driven timing setup.
According to the owners manual, 2005 Passat TDI timing belt needs changing on the 100,000 mile service.
the warning lights comes on indicating that the timing belt needs to be changed. even once the timing belt is changed, the warning light will stay on until is it reset.
generally a timing belt only needs replacing when it breaks
Changing a timing belt is very complex with hundreds of details. Directions for changing the timing belt can be obtained when you purchase the timing belt.
belt which needs changing at 100k miles or 8 years which ever is soonest
If it has the 4.6 or 5.4 it has timing chains
If it requires a timing belt it probably is but not all engines have belts. The Expedition uses a timing chain. It doesn't have to be changed as part of a schedule like a timing belt.
That engine doesn't use a timing belt.
It uses a timing chain
timing CHAIN(s)