[zachthebomb13]

So, I have a 2006 Mazda 3. I've seen two different plugs mentioned. Which one do I want?
NGK IX Iridium Spark Plug http://www.autozone.com/external-en...700_0_0/?checkfit=true&CJPID=4142171&cmpid=cj
NGK 90083 LTR5BI-13 Laser Iridium Spark Plug https://amzn.com/B00VHVHEIM

 

[zachthebomb13]

The NGK 90083 is the correct OEM one. I've used both before without issues, but the Iridium IX has a smaller gap (0.044" vs 0.055") than oem. I honestly couldn't tell a difference between them.

Rockauto has the 90083 for $8.82 each + shipping. So it may end up being cheaper than Amazon. Use the mazda3forums discount code '8507B9C3E039FF' in the 'How Did You Hear about Us' box to save 5%.

Did you regap the IX? I've never regapped spark plugs, so I'm not sure how hard it may be.