Best Spark Plugs of 2025

"I find these plugs to be pretty good, performing their job well."

"I received my order quickly, and the quality is excellent with accurate gaps."

"My mechanic recommended these as the best plugs for the price for my old farm truck."

"I purchased the NGK LKAR7BIX-11S Iridium IX Spark Plugs for my 2015 Lexus CT200h. The performance and durability are outstanding, making them a reliable choice for ignition power. I did need a specific spark plug socket for installation, but once I had the right tools, it was a hassle-free process. Since installing them, I’ve noticed a smoother acceleration and better engine responsiveness. Also, I appreciate the fast shipping from Amazon, which made the experience even better!"

"For my 2014 Prius V, I always choose NGK plugs. Installation was simple and they fired right up, running like a champ and exceeding CAFE fuel economy standards. They are a bit pricey, but if maintained, I only need to replace them about three times throughout the car's life. They are definitely worth the investment!"

"I bought these spark plugs for my 2014 Mazda CX-5 GS after getting warning lights and stuttering during start-up. I had never changed the plugs in the seven years I owned the car, so I was due for a replacement. The installation was quick, taking under 15 minutes, and the car started instantly. The old plugs were burnt out. So far, the car runs smoothly, and I’m really happy I chose these spark plugs!"

"My friend recommended NGK spark plugs, and after changing them with his help, I'm pleased to report that my truck is running much smoother. No more misfires, and I haven't seen the check engine light since. It's clear that the old plugs were the issue after eight years!"

"I replaced my old Champion plugs with these NGK ones, and they've been working great. Reliable performance so far, and I would definitely buy them again!"

"I initially thought the plugs were faulty due to my own mistake during installation, but the vendor handled my return with no issues. I appreciate their service and can confidently say these plugs are solid."

"I fixed the misfire in my car; it works best paired with coils. My car runs like it's brand new now."

"I swapped out the Denso plugs for these, and they work like a champ. I've noticed better gas savings and a more responsive throttle."

"I was worried about getting counterfeit plugs, but I’m pleasantly surprised that these seem legit."

"I installed these in my 2013 Honda Civic and noticed a huge improvement in performance right away. The car runs smoothly now, with no rough idling or concerning sounds."

"After putting these plugs in my Kia Soul, I resolved a cylinder code issue. They fit perfectly and my car is firing right again. Great experience so far!"

"I replaced the worn-out plugs in my daughter's 2008 Toyota Matrix and son's 2012 Honda Civic with NGK iridium plugs. The difference was noticeable, especially with the new ignition coils. They should last a long time!"

"These plugs were perfect for my 2003 Escalade. She's running like a dream. I always check the gap before installation, but they were good out of the box."

"Installation was a breeze and the engine started right up. I gave it 4 stars since I had to adjust all of them to .40; they came pregapped at .50, which was a bit annoying."

"Many forget to replace spark plugs. Once I swapped the old ones, I noticed the gaps were off. I installed these, gapped them correctly, and the improvement in sound and power was remarkable. No complaints here!"

“I found the NGK spark plugs to be a perfect fit for my Jeep, replacing the CHAMPION plugs after 80k miles. Now, my Jeep is running perfectly!”

“So far, I'm really happy! I got these plugs at the best price I could find!”

“I’ve always had great success with NGK spark plugs in my cars. For my 2017 Hyundai, I replaced the factory plugs with these because they’ve proven to be reliable over time. Buying from Amazon saved me at least $50 compared to other places. Plus, delivery was fast, and they were exactly what I expected—all pregapped as advertised!”

"I replaced the old spark plugs in my Honda Accord 2005 and they work great, lasting about 80k kilometers. The quality is excellent!"

"After changing my MDX engine's spark plugs, it runs perfectly now. My gas mileage has improved dramatically!"

"While these NGK plugs are expensive, they work well and I found a better price online compared to local stores."

"I've purchased these spark plugs for my Dodge Ram 1500 twice now. They perform exceptionally well, are high quality, and last a long time. My first set lasted over 3 years, and I only replaced them because they were fouled. They seem to enhance both performance and gas mileage, which is a nice bonus. This is my favorite brand, and the seller ships promptly with plugs gapped to spec. Highly recommended!"

"Since 1976, I've trusted Denso spark plugs for my vehicles, starting with my first car, a Datsun 510. Now, nearly 50 years later, I've used them in about a dozen different cars. For my 2003 Toyota Highlander V6 with 180k miles, this is my 3rd set of Denso plugs. They fit perfectly and I've never experienced a failure. I definitely recommend them as a solid choice for spark plugs."

"I installed these spark plugs on my '05 Scion tC after my previous NGK Iridiums burnt out. I was surprised that I wasn't experiencing more engine shudder during acceleration. I confirmed the application accuracy on the Denso website and they matched perfectly. The pricing was excellent, and the preset gapping was spot on. After just a few days, I noticed a significant improvement in how my vehicle drives. I even bought 2 extra as spares since my car is a four-cylinder."

"I found that these plugs fit exactly and the gap was perfect! My car takes off better now, and the engine runs a lot smoother. I think I’m getting the correct gas mileage too, with no misfires. I installed them by hand, and they went in easily without needing a torque wrench, although I ensured they were at the right torque. I highly recommend these over the OEM plugs!"

"I really appreciate the fast shipping and the excellent customer service! After replacing the spark plugs, my car is running much better and has more power when accelerating. NGK has a reputation for quality, and it definitely shows!"

"These are great quality spark plugs. I just installed them in my 2014 Mustang V6, and everything is running smoothly with no issues. They were pre-gapped, so I didn’t have to worry about that. I ordered from a US seller, and they arrived in the UK very quickly!"