Overview
The Omix-ADA 12025.23 is a gas tank filler neck grommet for early Jeep CJ models. It fits the Willys CJ-2, CJ-3, CJ-5 and CJ-6 from 1946 to 1958, and the CJ3, CJ5 and CJ6 from 1959 to 1971.
The grommet measures 3-1/8 inch outside diameter, 1-5/16 inch inside diameter and 5/16 inch thick. It is a direct OE replacement part from Omix-ADA, a Jeep parts brand.
Key features
- Direct OE replacement design, per Omix-ADA
- 3-1/8 inch outside diameter and 1-5/16 inch inside diameter
- 5/16 inch thick
- Covered by a limited five year warranty from Omix-ADA.
Installing a filler neck grommet
The filler neck grommet sits where the fuel filler tube passes through the body, and it cushions the neck against vibration while sealing out water and road dirt. On early CJ models, the grommet is one of the first parts to harden with age, because it is exposed to heat from the engine bay and to moisture from the filler opening. A worn grommet can let the neck rattle or allow water to reach the fuel tank area.
When fitting a new grommet, clean the filler neck flange and the body opening first, and check the neck for dents that could stop the grommet from seating flat. Work the grommet into place by hand rather than forcing it, so it does not tear. Fuel system work should be done away from open flame, and the tank cap should be closed during the job.
- Inspect the filler neck for dents and cracks
- Clean the body opening before fitting
- Replace the filler cap gasket at the same time
- Check that the neck sits straight and does not rattle
Specifications
| Brand | Omix-ADA |
|---|---|
| Part number | 12025.23 |
| UPC | 804314011581 |
| Outside diameter | 3-1/8 inch |
| Inside diameter | 1-5/16 inch |
| Thickness | 5/16 inch |
| Warranty | Omix-ADA backs it with a limited five year warranty. |
Vehicle fitment
The manufacturer fitment list covers the Willys CJ-2 and CJ-3 from 1946 to 1953, the CJ-5 and CJ-6 from 1955 to 1958, and the CJ3, CJ5 and CJ6 from 1959 to 1971.
Confirm fit for your vehicle’s year, model and trim before ordering, especially for later CJ7 and Scrambler models.
What’s included
The title names one filler neck grommet, part 12025.23. No other items are listed.



