Alfa Romeo 166 Booklet page 205

Change fuel filter (diesel versions)
Change air cleaner cartridge (petrol versions)
Change air cleaner cartridge (diesel versions)
Check and if necessary top up fluid level (brakes, hydraulic
clutch, power steering, windscreen wiper, battery, engine coolant, etc.)
Replacement of timing gear drive belt (*) and Poly-V accessory drive belt
Replacement of counter-rotating shaft drive belt (2.0 T.SPARK engine only)
Replacement of spark plugs (petrol versions)
Check operation of engine control systems (through diagnostics socket)
Check manual gearbox and differential oil level
Check electronic automatic gearbox oil level (Sportronic versions)
Change engine oil and oil filter
Change brake fluid (or every 24 months)
Check dust/pollen filter
(*) Or every 3 years in harsh conditions (cold climates, stop and go city traffic).
Or every 5 years, regardless of the mileage.
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