Ford 2003 Mustang Workshop Manual page 25

If equipped, inspect automatic transmission fluid level with dipstick.
Inspect brake pads, shoes, rotors, drums, brake lines, hoses and parking brake system.
Inspect wheel ends for end play and noise.
Inspect engine cooling system and hoses.
Inspect steering linkage, suspension and (if equipped) driveshaft and ball joints.
Rotate tires and inspect for wear.
If equipped, install a new cabin air filter.
32,000 Km (20,000 Miles)
Change engine oil and install a new oil filter.
Inspect tires for wear. Rotation recommended for optimal tire life.
40,000 Km (25,000 Miles)
Change engine oil and install a new oil filter.
Inspect tires for wear. Rotation recommended for optimal tire life.
Drain coalescent fuel filter and replace filter (NGV).
48,000 Km (30,000 Miles)
Change engine oil and install a new oil filter.
Inspect brake pads, shoes, rotors, drums, brake lines, hoses and parking brake system.
Inspect wheel ends for end play and noise.
Inspect engine cooling system and hoses.
Inspect exhaust system and heat shields.
Inspect steering linkage, suspension and (if equipped) driveshaft and ball joints.
Rotate tires and inspect for wear.
Install a new engine air filter.
Install a new fuel filter. (See ADDITIONAL INFORMATION below.)
If equipped, install a new cabin air filter.
Change automatic transmission/transaxle fluid on all vehicles equipped with AX4S, 4F50N,
4R100, 4F27E. Inspect automatic transmission fluid level using dipstick on all other vehicles, if
equipped.
If equipped, install new climate controlled seat filters (Navigator, Lincoln LS and Aviator).
ADDITIONAL INFORMATION: If vehicle is registered in California, the California Air Resources Board
(CARB) has determined that failure to install a new fuel filter at this interval will not nullify the emission
warranty or limit recall liability prior to completion of the vehicle's useful life. It is, however,
recommended that maintenance checks be carried out and recorded at the indicated intervals.
Natural gas and propane vehicles also require checking the fuel tanks and installing a new filter
(propane vehicles).
56,000 Km (35,000 Miles)