I purchased "6x NGK IZFR5K11 3657 Laser Iridium Spark Plugs for Honda Odyssey Pilot Acura MDX" for a total of $18.99 on eBay. When they arrived and I opened them up, I immediately noticed that none of the center electrodes looked the same. I became suspicious about the plugs authenticity and, after doing some online research, I was pretty sure that they were fake. I went to Advance Auto Parts and purchased six more on sale for a total of $68.14. After comparing the spark plugs from eBay to the ones from Advance Auto Parts, I was able to confirm that the ones from eBay were fake.
I am attaching photos to show you what I found:
1) On the fakes, the back of spark plug box does not have NGK's website listed, and the caution triangle is not filled in with yellow.
2) On the fakes, the tip protectors do not extend past the end of the spark plug tips.
3) On the fakes, the center electrodes are not consistent in size/shape/appearance
4) On the fakes, the ground electrodes do not have a nice rounded/arc shape
5) On the fakes, the origin stamping just says ////JAPAN////
6) On the fakes, the terminal has a ridge around the top (instead of being flat with a slight concave in center).
7) Photos from the eBay listing (NOTE: Exactly as they appeared on the listing - blurred)
NOTE: In my pictures, the FAKE plugs are always on the left, and the GENUINE plugs are on the right
I hope this might help others determine whether or not their NGK spark plugs are genuine.
I am attaching photos to show you what I found:
1) On the fakes, the back of spark plug box does not have NGK's website listed, and the caution triangle is not filled in with yellow.
2) On the fakes, the tip protectors do not extend past the end of the spark plug tips.
3) On the fakes, the center electrodes are not consistent in size/shape/appearance
4) On the fakes, the ground electrodes do not have a nice rounded/arc shape
5) On the fakes, the origin stamping just says ////JAPAN////
6) On the fakes, the terminal has a ridge around the top (instead of being flat with a slight concave in center).
7) Photos from the eBay listing (NOTE: Exactly as they appeared on the listing - blurred)
NOTE: In my pictures, the FAKE plugs are always on the left, and the GENUINE plugs are on the right
I hope this might help others determine whether or not their NGK spark plugs are genuine.