Fiat Ducato 2021 Owner's Handbook Manual page 263

Thousands of miles
Thousands of kilometres
Inspect the conditions of toothed timing drive belt
Check parking brake lever travel and adjust, if necessary
Check exhaust emissions/smokiness
Use the diagnosis socket to check fuel/engine management system operation
and engine oil decay (the latter for versions/markets, where provided)
Check cleanliness of sliding side door lower guides for versions with S.S.D.
Replace fuel filter cartridge
Replace accessory drive belt/s
Replace toothed timing drive belt
Replace the air cleaner cartridge (2) (3)
Change engine oil and replace oil filter
Change the brake fluid
Replace the passenger compartment filter
Years
30 60 90
48 96 144
2 4 6
(6)
(6)
(4)
(5)
120 150
192 240
8 10
261