NGK 90083 LTR5BI 13 Laser Iridium Review

Bought about two years ago to replace old Mazda spark plugs. Had high hopes for NGK and the quality seems good so far and hope they last longer than platinum spark plugs because the price is really high.

I used these to replace aging spark plugs on my 2011 Mazda 3 GT Hatchback 2.5L. Easy to exchange. This is actually an OEM part for these vehicles. And my engine is a little more responsive now with fresh, clean spark plugs burning in the cylinders.

Perfect for my Mazda3 MZR 2.0 2012 (not Skyactive vin F). These are exactly the plugs that are used from the factory. It's usually best to use the one that the car came with. My Mazda had to change spark plugs at 75,000. I changed them at 71,000. Although I only changed them because I followed the maintenance schedule, I'm glad I did. Now my car runs smoother and easier. Of course, the old ones really had to be changed.

Both ends of each connector box were damaged upon arrival. On three of the four plugs, the cardboard sleeves did not cover the plug tips. One connector had a significantly different (smaller) gap size than the others. One of the four plugs had dirt and grease on the top threads leading me to believe someone has tried to install it before.

Installed on my 2010 Mazda3 Touring (2.0) last month. They look like stock iridium candles that have lasted 90,000 miles and work great. I've always gotten around 28-30mpg in mixed driving depending on traffic and A/C usage and they seem to be just as good or maybe a little better than the stock. Installation was very easy (see YouTube video) - just be careful not to over tighten the threads and use a torque wrench to prevent over tightening (aluminum bushings). Buy it; Just don't bother with…

This manual number is no longer available. This is the NGK recommended connector - it is highly recommended that you verify your application by looking at the NGK website as I did. They don't have the little "crush washer" that most plugs have - these plugs are a tapered fit - there are no torque settings on the box, the box says to tighten 1/8 turn (I think that was it es) / 8 turn or 1/4 turn - you'll have to read the box yourself to see this.). I would normally use a torque wrench but not…

Excellent fit for 2011 Mazda 6 with 2.5L engine. The previous owner never changed the spark plugs which have done 124,000 miles. The old plugs were difficult to remove but surprisingly were in very good condition and did not cause any handling problems. I have no doubt that this new kit will last over 100,000 miles (although I plan to swap them out well before then to avoid repeating the complicated removal process). The price was shocking, but why bother with cheaper parts when the car works…