According to Honda, 105k miles. The maintenance schedule is at the link below. http://techinfo.honda.com/rjanisis/pubs/OM/OD0101/OD0101O00236A.pdf
Follow the directions in the owners manual provided by Honda.
From the 2006 Odyssey Manual: A is an oil change, 1 is rotate tires and 4 is replace spark plugs, and timing belt. Inspect water pump and valve clearance.
B = Change Oil/Filter Emmission check 2 = Change the air filter 4 = Replace spsrk plugs, adjust valves, replace cam belt
This is the service reminder for replacing the timing belt, water pump, spark plugs, and I believe the transmission fluid change too.
where are the plugs located
how to change spark plugs in 2004 honda civic lx?
A = Change the oil/filter 1 = Rotate the tires 4 = Replace the cam belt, adjust the valves, or replace the spark plugs or all 3.
Honda recommends every 100,000 miles.
Remove old spark plugs. Insert new spark plugs..... Simples
Take the old spark plugs out and screw the new ones in
i change the spark plugs on my car but they keep popping out
Generally I change platinum plugs at 100K and regular plugs at 50K.