Bosch 9621 Double Iridium Spark Plus 4 for $10 (Work for Gen3 Prius)

That link doesn't seem to work any more. I do see them on US site for $7.91 (USD) apiece, and on Canadian site for $12.32 (CDN). In both instances Amazon says they're compatible.

All that said, I'll probably go for Denso SC16HR11, and I'm a little leary of Amazon orders for spark plugs, would likely order from a local automotive specialty store I've always used.

 

It’ll work slightly but search PC for mpg results of non oem spark plugs that replaced oems first

 

I have these and they seem to work.
Gonna be taking them out soon to see how well they are doing.
I purchased mine from Pepboys.


Posted via the PriusChat mobile app.

 

With replacement at 120K miles or 12 years, I can't get too excited about alternatives. With that long a service interval, the cost becomes totally trivial.

 

be cautious of chinese knockoffs

 

^^^ Yep !

 

I would not recommend buying iridium plugs on Amazon or eBay. A lot of counterfeits.

 

As long as it is local reputable shop, just buy it. But I prefer Denso/NGK for any japanese cars.

 

4 for $10? I'd bet they are cheap china copies.
I bought mine from autozone for just over $7 each, with 10% veterans discount.
The original ones I replaced looked fine. And when I changed the Bosch's, they looked new also.

 

No, I did not. I searched around for prices for about a month or so.
They had the best price, at the time.
You got lucky and got a deal. Be thankful. That's what I was hoping for.
But if you check everyday, sooner or later hopefully you find a deal.

I just did a search and found this on amazon.
Ebay was about the same price.