2003 Sonata V6 Spark plugs

My daughters 2003 sonata V6 (that I gave her when I got my 2007) has
70000 miles on it.
I am looking for plugs for it. The manual says champion RC10PYPB4,
but when I look up that plug it shows that its for the 2006-7 Sonata
V6. When I look up the plug for 2003 Sonata V6, the sites always show
the (champion) plug RC12PYP double platinum or the 9201 Iridium
Plug. If the 2003 really has the same plug as the 2007, why does it
need changing at 60000 miles when the 2007 only needs it at 100000.
What plug has anyone found in the car when they went to change them?
What did you use for replacement? My experience with older Sonata has
been that the wires are more likely to fail earlier than the plugs.
Is everyone changing the plugs around the recommended period? What
about the wires?

 

I can't give the specifics of plugs needed, but they may be the same. Plug
life is affected by the ignition system and the newer one may be keeping the
plugs cleaner over time. And then there is combustion chamber design. I'll
leave details to the experts

As for the wires, there is a chance that one can get damaged or broken when
pulled off the plug and it may not show up right away. Since half the work
is already done, IMO, it pays to replace the wires after that time and
miles.

 

I,d agree with that. My first V6 Sonata had all 6 leads fail within 2 months
of each other at about 40,000 km. The leads hadnt been shifted at all, you,d
wonder what makes them fail.
John

 

Just changed plugs on my brother's 2004 Tiburon V-6. The originals were
NGK Platinums, so that's what we replaced them with. Five of the six
plugs were barely worn after almost 60K miles, the number 2 plug on
the front bank was severely worn (1.8mm gap instead of 1.0mm). Two of
the 3 front bank plugs required an impact wrench to safely remove
them.

 

"Two of the 3 front bank plugs required an impact wrench to safely remov
them."

I didn't remember this from your previous post. Can you explain (o
re-explain)? The statement seems contradictory

 

When trying to remove the front bank of plugs, the #1 plug loosened with
what I consider a normal amount of effort, about 20 lb-ft. When I used the
same amount of torque on #2, it didn't budge, and having snapped off a
couple of spark plugs in a friend's 87 Oldsmobile 4 years ago trying to
be helpful, (and sending it to the junkyard as a result) I didn't want a
repeat performance. Less than half a minute with an electric impact wrench,
loosening, tightening & loosening removed the stubborn plugs.

There was no carbon buildup on the stubborn plugs, and none of the
plugs in the rear bank presented a problem. I can only assume that
they were removed and overtightened at some point. No trace of
anti-seize.