2004 HONDA Odyssey K24A (Japan 2.4L DOHC i-VTEC inline-4)/J35A4 (North America 3.5L SOHC V6) (RA6/RA8 (for Japan), RA1-RA5 (US/Europe versions differ))

Engine identity

Oils and fluids

Service and parts data

Common and chronic problems

• Automatic transmission fluid degradation in North American V6 models
• 4-cylinder engine valve cover gasket leaks (Japan model)

First checks

• Check timing chain noise
• Inspect transmission fluid condition
• Verify suspension bushings for wear

Before replacing parts

• Save fault codes and freeze-frame data before clearing anything.
• Check engine oil, coolant and transmission fluid using the correct temperature and service procedure.
• Verify power, ground, connectors, hoses, leaks and live data before replacing expensive parts.

Important notes

• Two distinct main variants worldwide: Japanese domestic market with 4-cylinder K24A engine, North American market with V6 J35A4 engine.
• European Odyssey was rarely offered in 2004 and often imported, hence mostly not considered a target market for this generation.