

Select your vehicle to check fitment.
Tester Adapter
Fits Volkswagen, Toyota, Porsche — 91 vehicle applications
Contact us at 1-866-461-2787 for pricing
Contact us at 1-866-461-2787 for pricing
Call for PriceCustomer reviews
- Verified
“I've been ordering from Autrex for over 2 years now. Their fitment tool is incredibly accurate, and I've never received a wrong part. The prices are competitive and shipping is always fast. Highly recommend!”
— Michael T., Toronto, ON
- Verified
“Had an issue with a brake caliper that turned out to be defective. Their warranty team handled the replacement quickly and professionally. New part arrived in 3 days. This is how customer service should be!”
— Sarah L., Vancouver, BC
BFNG 12423S Vehicle Fitment
Fits 91 vehiclesThis Tester Adapter fits Volkswagen, Toyota, Porsche vehicles.
1981-1984 Volkswagen Jetta
1978-1982 Volkswagen Brasilia
1977-1978 Volkswagen Hormiga
1976-1979 Volkswagen Rabbit
1976-1979 Volkswagen Scirocco
1971-1979 Volkswagen Super Beetle
1971-1974 Volkswagen Safari
1966-1979 Volkswagen Beetle
1961-2004 Volkswagen Sedan
BFNG 12423S Specifications
- Prop 65
- ADVERTENCIA: Riesgo de cáncer y daños reproductivos - www.p65warnings.ca.gov
- End 2 Outside Diameter
- 1.81 in
- Hose Included
- No
- End 1 Inside Diameter
- 1.85 in
- Fittings Included
- No
- Prop 65
- WARNING: Cancer and Reproductive Harm - www.p65warnings.ca.gov
BFNG 12423S Interchange Numbers
This part replaces and is compatible with the following part numbers
Interchange Numbers
BFNG 12423S Product Description
Fuel Cap Tester Adaper for use with Stant fuel cap testers. Color coded for easy identification. Made of durable plastic.
Key Features
- Adapters meet EPA standards for recommended fleet coverage.
- BAR Certified adapters
- Adapter check's a fuel cap's ability to hold pressure.
- Check adapter application chart for specific makes and models
Fuel Cap Tester Adaper for use with Stant fuel cap testers. Color coded for easy identification. Made of durable plastic.
About BFNG
Shop BFNG Fuel Cap Tester Adapter at Autrex with vehicle fitment details, current pricing, and checkout options for the BFNG 12423S. Eligible orders over $99 may qualify for free shipping, with some exceptions.
Frequently Asked Questions — BFNG 12423S
What vehicles does the BFNG 12423S fit?
The BFNG 12423S fits 11 vehicle applications including 1961-2004 Volkswagen Sedan, 1985 Toyota Land Cruiser, 1981-1984 Volkswagen Jetta, 1978-1982 Volkswagen Brasilia, 1977-1979 Porsche 924 and 6 more. Check the full fitment list above to confirm your vehicle.
What parts does the BFNG 12423S replace?
The BFNG 12423S is a direct replacement for 12423S, 12423S, 12427, 12423, 12423S and 1 other part numbers. See the full interchange list for all compatible replacements.
What are the shipping options for the BFNG 12423S?
Shipping options for the BFNG 12423S are shown during checkout and may vary by item, address, and availability. Eligible orders over $99 may qualify for free shipping, with some exceptions. Call 1-866-461-2787 if you need help confirming shipping or pickup before ordering.
What is the price of the BFNG 12423S?
For current pricing on the BFNG 12423S, please call us at 1-866-461-2787. Availability and final order details are confirmed before checkout is completed.
Is the Tester Adapter a direct fit replacement?
Yes, the Tester Adapter by BFNG is designed as a direct fit replacement. Use our vehicle selector to confirm compatibility with your specific vehicle.
What warranty does the Tester Adapter come with?
The Tester Adapter comes with the standard BFNG manufacturer warranty. Please check the product specifications for exact warranty terms.

