I think my 07 manual says 100,000 miles
30000 miles
To replace the spark plugs from a 2004 Kia Sedona the plug wires ,must be removed from the engine. Unscrew the plugs. Properly space the new plugs and screw them in.
every 100,000 km
.044
The manufacturer recommends that the spark plugs are changed every 30,000 miles. Many individuals have experienced a much longer life for the spark plugs.
thank you
Once on 1-2 year on regular spark plugs. Once every there years on High end spark plugs.
100K if they are platinum plugs, 50K if they are regular plugs.
Changing spark plugs is relatively easy. Disconnect the batter and spark plug cables, and remove the old spark plugs. Next replace the spark plugs with new ones, reconnect the spark plug cables and battery.
the transmition ,is probably not adjusted to the spark plugs,or their not the right spark plugs
Remove the upper intake, then proceed as with the other plugs.
there are 6 spark plugs, 3 are visible and easily changed, but 3 are under the engine and very difficult to get to. I had to have a shop do the work and they said they had to pull the motor to reach them.