2004 Jeep Wrangler Owner's Manual - Page 278

M 278 SCHEDULE "A" A I N Miles T (Kilometers) E N [Months] A Change the engine oil and engine oil filter. N C Inspect the engine air filter element, and replace if necessary. E Replace the ignition cables (2.4L Only). S C H E D U L E S 108,000 (173 000) [108] X 114,000 (182 000) [114] X 8 Inspect the PCV Valve, and replace if necessary. Replace the spark plugs. Lubricate the steering linkage joints and outer tie rod ends. Lubricate the steering and suspension ball joints. Inspect the brake linings. Replace the timing belt (2.4L Only). Inspect the drive belt, and replace as needed. Not required if previously replaced. Drain and refill the transfer case fluid. Inspection and service should also be performed anytime a malfunction is observed or suspected. Retain all receipts. X X X X 120,000 (192 000) [120] X X X X X X X X X X This maintenance is recommended by the manufacturer to the owner, but is not required to maintain emissions warranty.