2004 Jeep Liberty Owner's Manual - Page 336

M 336 SCHEDULE "B" A I N Miles T (Kilometers) E N Change the engine oil and engine oil filter. A Inspect the engine air filter element, replace if N C necessary. E Replace the spark plugs. S C H E D U L E S 48,000 (77 000) X 51,000 (82 000) X 54,000 (86 000) X 57,000 (91 000) X 60,000 (96 000) X X X X X X X X X X 8 Inspect and replace the PCV valve, if necessary. Replace the ignition cables (2.4L Only). Inspect the brake linings. Drain and refill the front and rear axle fluid‡ Drain and refill the automatic transmission fluid, and replace main sump filter. Inspect the drive belt and replace as needed. Not required if belt was previously Drain and refill the transfer case fluid. X X