You can usually find DENSO IRIDIUM Spark Plugs , which are the OEM Supplier, for about $15 each at any Advance Auto or other major auto parts store.
Yesss got denso coils and spark plugs off their site and they have been great
And, before you get too far, are you replacing with the right plugs? I presume it’s the 2AZ 4-cyl since you’re not asking us how to get to the back plugs. The right ones are the Denso Iridium Long Life or the NGK Laser Iridium.
I use Denso IK20TT and these spark plugs work every time, on both fuels.
I put denso 5310 in mine, apparently they are supposed to give you a slight increase in power if you use premium fuel.
Idk if I gained any power, but the car runs well.
Have used NGK on my Toyota Prius v, works just fine, never had problems.
Changed them recently, still had factory Denso spark plugs, and they worked alright too, even after 121k miles of use.
We changed that spark plug and the customer was happy with the magneto drop. That spark plug worked fine on a Champion spark plug bomb test.
I bought the plugs from Toyota (Denso). I asked for the old plugs off. The plugs I got back were NGKs that were installed at the factory. I can’t say I notice a difference really (except new plugs did seem to make a difference).
I tried one of the economy plugs on my 02 Accord. Ended up having to chuck it and buy a Denso.
I tried Denso once. I took Denso’s out and replaced them with Denso’s. They ran for 500 miles and quit.
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