NGK (5464) BKR5EIX-11 Iridium IX Spark Plug (4 Pack)

Good quality spark plugs, work well and at almost half the price in stores.

I bought a Pontiac Vibe 2005 recently. I have been having issues with a rough idel and un-burned gas smell in my exhaust. I bought these spark plugs and they fit perfectly. Great value for the money. You can see my old plugs. I don't know how many miles are on them. I just hit 250,000 miles on my vibe. It purs like a kitten now!

buena calidad, y funcionan de manera optima

These lasted about 70,000 miles in our Chrysler crossfire. The gap was .40 when installed in 2019 and greater than .70 when removed in 2025. Because it is a Mercedes m112 engine, it requires 2 plugs for each cylinder. I will use the platinum in the future over iridium because they last longer. I did have two of the factory NGK plugs and they read a gap of about .44.

My Subaru had been running a little rough and it was time for new spark plugs so I decided to go for the upgrade and try iridium plugs. The old plugs had about 50k miles on them and were long overdue for replacement. The OEM plugs were platinum and I had been told that platinum plugs can last as long as 100k miles. That certainly wasn’t the case here as after 50k they were all fouled. I installed the new iridium plugs and suddenly my engine was like new again! The idle was quiet and smooth like it should be. I’ve also noticed a slight increase in fuel economy, but that’s no surprise after replacing fouled out plugs. Having only put about 1k miles on them so far I can’t say whether the BKR5EIX-11 Iridium IX Spark Plugs are any better than the OEM platinum plugs, but they’re about the same price so why not give them a try? Iridium is a much harder metal than platinum, with a substantially higher melting point, so these plugs are more durable and should last longer than platinum at least in theory. They don’t run any hotter than the OEM plugs, but with a finer electrode they require less power to generate a spark, which means they’re more efficient. I expected them to be pre-gapped, but since they’re not the OEM plugs for my Impreza 2.5i they weren’t gapped correctly for my car. I don’t know if it’s because iridium is a much harder metal than platinum and copper, or just that my hands aren’t as strong as they used to be, but I really had a tough time setting the proper gap of 0.44. Once I finally got them gapped I decided to save a lot of money and install them myself. I checked an online Subaru forum and some people said it was very difficult to change out the plugs on a 2008 Impreza. While I wouldn’t say it was easy, I definitely would not say it was all that hard. As long as you have a standard 5/8” spark plug socket, a 3” or 4” extension, a swivel bit, and a little bit of patience, I don’t see any reason to pay a shop or dealership a ridiculous sum of money to install them for you. Perhaps if you consider your time extremely valuable or maybe you spent a lot on your manicure it would be worth it, but you don’t need to be a master mechanic to install new plugs in an Impreza. If you prefer to leave such tasks to the professionals, no judgement here. I’m just a little short on cash right now and the dealership wanted an awful lot of money to swap out four spark plugs.

great product

Great quality from a great brand. These I have used many times and never an issue. They come properly sized and they have proven to be long lasting at a very good price point

Gooooooooood

Changed spark plugs on 2008 Mazda3 1.6 with this set of 4 spark plugs. Works very well and no more stuttering engine during idle. Highly recommended!

NGK (5464-4PK) Iridium IX Spark Plug. I installed these spark plugs in my old 2007 model Santro Xing XO car on October 20, 2025. I waited this long to give my review after using them for the past two months. The main things I noticed are that my car's pickup has improved significantly, feeling like a new car again. The car's mileage has also increased to 15 kilometers per liter. According to NGK, these spark plugs don't need to be replaced for up to 50,000 kilometers. Another important thing I noticed is that the CO levels in the car's emissions have decreased. This means it's not only good for the environment but also increases my car engine's lifespan. I also understand that this provides a solution to the problems faced by older cars due to E20 petrol. Although the price is a bit high, considering the long-term benefits, I think paying this price is justified. Therefore, this investment is necessary to improve car performance.

ممتازين بصراحه

Great deal ! Item is genuine , priced very fairly ! Highly recommended

Excelente calidad