It's usually recommended every 50 to 60 thousand miles.
30000 miles
http://www.santafemods.com/Mods/SparkPlugReplacement.htm
My car 2007 is a four cylinder Hyundai sonata Is there any truth to what the service manager said about having to remove the manifold to change the spark plugs?
100K if they are platinum plugs, 50K if they are regular plugs.
every 100,000 km
how do i change the spark plugs on a 2006 hyundai accent
where are the spark plugs for a Hyundai sonata that the year is 1999
thank you
they are located at the back of the engine on the head between the bulk head and engine. ray
how many spark plugs in the v6 2.7l 2003 Hyundai sonata?
Well it is easy to get to the front spark plugs but you are going to have to take off the intake manifold to get to the rear ones. Not an easy job. Probably have to pay big bucks at a garage to do this unless you can do it yourself.
how to change spark plugs on a 2004 Hyundai sonata 6 cylinder