Denso Spark Plug Iridium TT - 4705

Ordered these for 3nd gen Taco. Since new the truck stalled, hesitated, almost dies during acceleration. Throttle response terrible. Fine once achieve hi-way speeds. Changed coils, throttle body, exhaust.....etc. nothing helped. Pulled the OEM plugs and tested, 3.11k-4.10k ohms. Found 2 of the Denso IKBH20TT plugs bad 4.11k-4.12k ohms. Return and replaced, these 5.20k-5.50k ohms. Kept the gap at 0.04 since a larger gap produce more hp ?? Throttle response great, smooth accel, engine ran better, slight improved hp/mpg. Amazing never thought spark plugs would make such a difference. Convinced OEM pugs are junk.

I used these to replace plugs on an 18 sienna. I noticed after I received them that it was not the OEM part number but after a bit more digging found that they still would fit. I'll tag on the same complaint with the packaging for these. They were in a regular paper package and inside small little cardboard boxes. Would be easy to damage them or mess up the gap. But in my case they all turned out fine. I still had to adjust the gap slightly. I know all the packages say not to but I've had no problems as long as it's just a slight adjustment. I feel like the engine ran quieter and had a bit more power after replacement. I'll likely use these again when I get to the change interval later.

True Denso. They have worked great since I put them on my 07 IS250 in August 2024.

Though my car and motorcycle are listed with Amazon, additionally, with an extreme schedule at 69 and an invalid wife and having to work Door Dash to supplement S.S.I. I tried to cram oil and coolant change with cabin filter and service my K&N air filter with a new dash cam to boot plus plugs at 106,000 miles, Though I crawl on the ground to do my own work as is needed, these plugs I bought did not fit in my car. I tried to do all of this as my energy and schedule permitted on 5/21/25 which put me 2 days past my return eligibility. So I had to plop down $70 more at O'Reilly's Auto Parts to finish the job yesterday 5/21/25. Responsibility to get out and do the job within 30 days of delivery should not be the issue. With whom the fault lies re: the ordering of spark plugs should also not be the issue either. If we were of child bearing years should I make a mobile with these plugs to amuse our new baby? If they are the wrong plugs I should be able to return them for a refund as long as they are (a) in new condition. (b) have undamaged packaging. (c) have not been replaced with "New & Improved" making these plugs obsolete. I want a refund. That's All FOLLOW UP. 5/24/25: After several attempts to arrange a funded return I was speedily assisted through Amazons chat customer service. The person who helped me lent a listening ear and the reasons that I could not just stop what I was doing the learn that I had the wrong plugs. Within ten minutes my situation was resolved. Thanks Amazon & Allan!

I installed these and did not adjust the gap. I know, I know, these are gapped .040 and the manual says .032. No check engine light, truck runs fine and I get the same fuel mileage as before. Great price.

These are a direct replacement for what I needed on a Toyota. Name brand reliability and quality from these plugs. They were identical to the ones I was replacing, but they came at a much better price point than purchasing through a dealer or parts retailer.

Checked the gap on the plugs & found every plug needed adjusting for Lexus RC350 F Sport.

like oem