oem its "NGK DILKAR7M8"
The spark plug gap is already 1mm*Must be replaced, although it can still be used, but you can feel the decline in performance
Denso Iridium TT Spark Plug
Because the price is cheap ,4 for 27$
and working very well*
But! i think...
I also have the same situation, but I only have one, it is also near the front windshield. Today I repaired with a paint pen. I hope it will not amplify the damage. I am mechanically gray.
And I think Mazda car paint is thin!
My own car has been installed. This is the result of testing a lot of led bulbs. The bulb is perfect! I only have one set. I hope people with needs can get them. And share my results, I'm not for profit. Now my car is full of leds, perfect!
LED turn signal replacement! No need to add resistance! Super bright!
Selling of your own product is only allowed in the marketplace, and in accordance with these rules (Rule page)Topic III
I don't doubt your intentions as I have seen you around and you have an excellent ebay rating