Arcadian

Hi, I have 50,000KM on a set of plugs (GS400) My dealer suggests replacing, but wants $600. That seems like a lot to me. Also over the last 2-3 months my idle speed while stopped in drive is getting lower, now about 700rpm and with a slight vibration. Could that be due to sparkplugs? Appreciate your advice.

AZTurbo

iTrader: (10)

Plugs are not that hard to do yourself. The rear cylinders may give you the most trouble due to their location, but you can DIY. NGK or Denso plugs are < $10.00 each.

NukedGS300

If you look in the DIY sticky in the 2nd gen forums, there is a link to a couple of how-to's with pictures on changing sparkplugs on a GS300. I would post the link, but i havent had 30posts, 30days yet so it wont let me.

ThomasGS4

iTrader: (19)

Spark plugs are quite easy to replace. The driver side is easily accessible, but the passenger side requires the removal of the air intake. I personally didn't notice a difference in the way the car idled or drove after replacing mine though.