Denso (3426) FK20HR-11 Iridium Long Life Spark Plug, Pack of 1

4.4 4.4 out of 5 stars | 248 ratings

Price: 12.08

Last update: 12-14-2024


About this item

Denso # 3426
Extra Long Life Iridium Plug
0.5 mm Fine Wire Iridium Center Electrode
0.7 mm Platinum Needle Tipped Ground Electrode

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Denso (3426) FK20HR-11 Iridium Long Life Spark Plug, Pack of 1

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Materials & Care

Top reviews from the United States

yorinni
5.0 out of 5 stars Check them!
Reviewed in the United States on September 9, 2024
My 6 where shipped in a huge box let me tell you. Most if them slipped out of their individual boxes, some people might like that but not me. They might work maybe possibly, check them they look great. Checked their gap gently like a baby, all gapped correctly. No issues, made my engine great again, no wall needed.
Tony S.
5.0 out of 5 stars OE style
Reviewed in the United States on September 8, 2023
These are the correct OE plugs for Toyota/Lexus. My wifes Highlander had the original plugs at 180,000 miles.Still ran ok but were really worn.It took me over 3 hours to install.the wiper cowl assy had to come out to remove the intake plenum to gain access to the rear 3 plugs. the front plugs took 10 minutes. runs good now. I just did the same job on my Lincoln only took 1 1/2 hours. I highly recommend using only the OE brand spark plugs on any late model engine.
KP
5.0 out of 5 stars Great OEM Plugs!!
Reviewed in the United States on September 16, 2023
Finally decided to install new spark plugs in my 2011 Toyota sienna van with 198,000 miles! Had no problems with original plugs just decided it was time to change them since I intended on keeping it another 100,000 miles. See the photo of the original plugs versus the new one on the far right! Hoping to see a little boost on mileage.
Customer image
KP
5.0 out of 5 stars Great OEM Plugs!!
Reviewed in the United States on September 16, 2023
Finally decided to install new spark plugs in my 2011 Toyota sienna van with 198,000 miles! Had no problems with original plugs just decided it was time to change them since I intended on keeping it another 100,000 miles. See the photo of the original plugs versus the new one on the far right! Hoping to see a little boost on mileage.
Images in this review
Customer image
Enrique Cardenas
4.0 out of 5 stars Are they fake or not
Reviewed in the United States on November 16, 2023
Still testing the performance in my van, at high speeds seems to be some stalling not sure if there has to be more work done, only installed 3 of the 6 plugs, I threw away the originals big mistake can't compare performance, not sure why it's recommended to change plugs at certain mileage if everything is working fine well live and learn, still working on the vehicle to verify authenticity.
Abraham Ramirez
5.0 out of 5 stars High quality Denso
Reviewed in the United States on March 9, 2024
I use them for my 2011 toyota sienna since those are the OEM. And they work fantastic car doesn't feel slow any more. Or like if there was a barely misfire. It just feel smooth ????. I recommend you doing them.
Bradley thach
5.0 out of 5 stars OEM
Reviewed in the United States on March 19, 2024
Legitimate oem product
todd ngo
2.0 out of 5 stars lasted for few months
Reviewed in the United States on May 22, 2024
This is the 2nd set I purchased because the first 3 out of 6 failed. I'm not sure what happened but the tips worn out faster than other so I'm not sure because of my car which is a 2010 Lexus rx350 which ran fine after and before these spark plugs failed. failed spark plugs causes all kind of headache and time and money before I've realized it the fouled spark plugs. first it gave me random misfire for all kind of cylinder and it would jumps all over the places, and I've tried all the tricks and swaps then finally took to the mechanic. Even the mechanic did compression test and didn't know what's going on. I'm not even sure why he didn't diagnose the spark plugs at first even though he's been a mechanic over 30 years. I think this called "ghost misfire" the causes the car was running horrible in cripple limped mode, it was shaking and the RPM was bouncing and idle way too low. so the bottom line is don't think this is the best of the best and think you're set for a long time
Southern Patriot
5.0 out of 5 stars Exact match for Toyota/Lexus OEM
Reviewed in the United States on September 2, 2021
Bought these to replace the plugs in my 2015 Lexus RX350. They are the same exact part number from Denso as the OEM.

I will say the pricing isn't the greatest on Amazon when I bought them at $13/each, but it's convenient and I didn't have to go to the Toyota/Lexus dealer.

These are indeed 100% legit, I scoped them out with a magnifying glass, they are exactly the same as what came in the car from the factory.

Lexus RX350 Toyota 3.5L

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