2004 Honda Odyssey Service and Repair Manual

This 2004 Honda Odyssey factory service and repair manual is built around the 3.5L V6 (J35A4) and the exact trim you drive, so the specs, wiring diagrams and repair sequences inside match what Honda published for this year rather than a generic minivan writeup.

Engines covered

• 3.5L V6 — SOHC, naturally aspirated, gasoline

Body styles covered

• 5-door mini passenger van

Trims covered

• EX
• EX-L
• LX

Known issues on the 2004 Odyssey. Thirteen recalls are on federal record for this model year, most of them tied to the Takata frontal airbag inflators: propellant that degrades after long-term heat and humidity exposure can cause the driver- or passenger-side inflator to rupture on deployment, throwing metal fragments at occupants and risking serious injury or death, with a related campaign covering a passenger airbag that may have been installed incorrectly. A separate pair of recalls covers an air bag control module that can misread electrical noise and trigger the front and side air bags and seatbelt pretensioners with no crash involved. Beyond the air bag system, Honda recalled the ignition switch interlock lever, which can deform and let the key be removed without the automatic transmission in park, allowing the vehicle to roll away; the fuel pump, which can corrode at an electrical terminal and stall the engine without warning; and the automatic transmission, where heat buildup between the countershaft and secondary shaft second gears can chip or break gear teeth and lock the transmission up. Owners have filed 584 complaints for the year. The factory diagnostic and repair procedures behind every one of those systems are here.

From an air bag inflator inspection to chasing a rollaway condition, a stalling fuel pump, or a slipping transmission, it keeps you on the OEM procedure and the correct specification for your specific 2004 Odyssey.