USPS shipments from our warehouse may be slightly delayed. Details

Welcome to Flyin' Miata!

O-ring for oil filler cap

O-ring for oil filler cap
O-ring for oil filler cap
Stop the yuk.

Availability: In stock



Eliminate messy messes. If your oil filler cap is letting oil dribble all over your pretty valve cover, this is your solution.

Included in our engine rebuild kits. Fits all NA and NB engines. Mazda factory part.

Additional Information

Additional Information

Part number 04-36023
Fits: 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1999, 2000, 2001, 2002, 2003, 2004 (non-MSM), 2005 (non-MSM), MSM
Manufacturer Mazda
Flyin' Miata exclusive No
Fits Exocet? Yes
Proposition 65 Warning: Cancer and reproductive harm
California emissions Emissions regulations do not apply

Customer Reviews 3 item(s)

Direct replacement
My old one was hard as rock. This one went in easily.
Review by KEVIN / (Posted on 2/16/2020)
Perfect fit
I had oil appearing around my oil cap and although the o ring appeared fine, the new O-ring was much softer and provided a better seal that eliminated the leak.
Review by Mark / (Posted on 4/10/2019)
Genuine Mazda part!
Was getting a little drip around the filler cap. As far as I can tell, this genuine Mazda replacement has fixed it!
Review by Luke / (Posted on 2/22/2019)
Instructions for this part are not currently available online.