These are fresh production O-rings produced in May 2024 with updated material to provide better resistance against chemical swelling and higher temperature resistance. 

You will receive 2 O-rings, in case you have an installation issue or need a spare for a friend. 

This O-ring is an updated replacement for part number 9954-10-3801.

The perfect replacement for the 1st Gen Miata  Cam Angle Sensor O-ring.

This O-ring leak is well known in the Mazda world and this updated O-ring is hopefully a permanent fix for this issue. 

I do my best to ship all items within 24 hours of payment, same day if possible.  Thanks for looking!

***Important Update- Buyers and Sellers on Ebay have been reporting issues with the Ebay Envelope that we are using to ship these items for "Free" at a low cost to us. I HIGHLY recommend using USPS Ground Advantage as your shipping on checkout. It is the best, cheapest option, and has a much higher success rate on arriving to you and within 2-3 days typically. I have had buyers report the free shipping option taking as long as 7-10 days or longer to arrive. You have to select it in the shipping options and yes it does add additional cost but it is a much more reliable option. I want what's best for you even if you don't buy from me.