How many miles do you have on those plugs. They are good for 190,000 kms. (119,000 miles)
They are either Denso or NGK iridium and are a top quality plug. If you want to replace them, buy the same plug that you have now as long as they are OEM. Check Rock Auto for them , much cheaper than dealer.
As others have said, 120k is the recommended interval, but you could probably go as long as it runs ok. I'm sure there are plenty of RAVs running around quite nicely with God-only-knows how many miles!
But if you'd rather start fresh(I agree), go for it.
So for those thinking of going "to the recommended" mileage... Think again.. These supposedly had 20k miles left on em according to that BS..
Most of the tips of the electrodes are gone.
Interesting....I've pulled mine out at 170,000 kms and they looked good and worked fine. A co-worker of mine said he went 250,000 kms and his mechanic was impressed how good the plugs still looked.
The recommended mileage is far from BS.