Denso3444 Spark Plug

I bought these Iridium spark plugs for my 2011 Prius, this is the exact replacement for a lot less $$$ than the dealer wanted, I can count on it for the next 100k miles, my original set last over 103k miles still works flawlessly, once the new set installed car pick up faster and much better power band merging freeway entrance, so...the iridium plugs DOES degrade in performance and fuel economy.I saved some $$$ by changing the plugs myself, it was a fist and time consuming removing chassis parts in order to gain access to the coils/spark plugs, a 14mm deep socket and long extension is need to get the old plugs out, from start to finished almost 2 hours in my garage, I search YouTube for the how to...video for reference. you need a torque wrench to ensure proper 15 ft-lbs torque.So...amazon rocks for the free shipping and best prices!

If your car has these from the factory then replace them with the same...you will survive another 120K miles with these installed.

The denso park plug works really fine. Before I brought the plug my car always to give a lot of problems. But thanks to denso this brand is good one I would recommend anyone to get.

The SC20HR11 is the exact OEM plug that it comes with from the dealer, and its listed on the owner's manual. I don't know why it says it doesn't fit. I replaced mine perfectly. You might want to change that.

Ok

Ordered it and got it replaced while I was overseas in Germany...I was having problem with my car, and I thought it was the spark plugs, but it wasnt, but I changed them out anyway, and they still seems to be working so I cant complain.

Uber frustrated that the seller didnt post or tell me that these require a 14mm socket to install/ remove! So i had to go and get the $5 part wasting time and $ on something that COULD have been avoided! The plugs install fine and work just fine.

Perfect fit for corolla, change every 80K miles.