Yeouch. Just got the news that changing the tires & spark plugs on our 2002 Prius is going to set us back just shy of $900! $120 per tire & Iridium spark plugs are expensive. OTOH, this is the first time in nearly 11 years we had to replace the plugs, so that’s not that bad. Plus 45+ mpg makes up for it these days. Just had to creeb about it a bit.