Thermostat Seal
$1.22
BFNG
Part # S401
4.7(47 reviews)Thermostat Seal
Fits BMW, Porsche, Dodge & more — 63 vehicle applications
Call for Price
Contact us at 1-866-461-2787 for pricing
available
Contact us at 1-866-461-2787 for pricing
Call for PriceFree ShippingOrders $99+
WarrantyManufacturer backed
Easy Returns30-day policy
Canadian OwnedShipped across Canada
Will this fit your vehicle?
Select your vehicle to check fitment.
BFNG S401 Vehicle Fitment
Fits 63 vehiclesThis Thermostat Seal fits BMW, Porsche, Dodge, Ford and 1 more makes vehicles.
2004-2006 Dodge Ram 1500
1994-2003 Dodge Ram 2500
1994-2003 Dodge Ram 3500
1992-2008 Dodge Viper
BFNG S401 Specifications
- Prop 65
- ADVERTENCIA: Riesgo de cáncer y daños reproductivos - www.p65warnings.ca.gov
- Color
- Silver, Black
- Prop 65
- WARNING: Cancer and Reproductive Harm - www.p65warnings.ca.gov
- Material
- Metal, Rubber
- Material
- Metal, Caucho
- Design
- OEM
BFNG S401 Interchange Numbers
This part replaces and is compatible with the following part numbers
Interchange Numbers
240199401S4012401447GC171447GC216S401S40124013S96434L8089P240112S233019-029S4016597612702025020RTS14661476383952452314763839AC4763839AB51321555132155S401333554813560018678012G31278069R91347497R91347947R91S401
BFNG S401 Product Description
Gaskets are made from high quality materials suitable for resistance to high temperatures and engine coolant to maintain a good seal. On adhesive backed gaskets, the backing reduces installation time by ensuring proper alignment and ease of installation. Thermostat seals are precision designed and made from high quality rubber products ensuring an accurate fit and durability for a long lasting seal.
Key Features
- Adhesive backed gaskets reduce installation time and ensure proper alignment
- Meets or exceeds all OEM standards
- High quality materials used for increased strength and durability
Gaskets are made from high quality materials suitable for resistance to high temperatures and engine coolant to maintain a good seal. On adhesive backed gaskets, the backing reduces installation time by ensuring proper alignment and ease of installation. Thermostat seals are precision designed and made from high quality rubber products ensuring an accurate fit and durability for a long lasting seal.
About BFNG
Shop BFNG Engine Coolant Thermostat Seal at Autrex with vehicle fitment details, current pricing, and checkout options for the BFNG S401. Eligible orders over $99 may qualify for free shipping, with some exceptions.
Ratings & Reviews
4.7out of 5
Based on 47 reviews
- 538
- 46
- 31
- 21
- 11
- Direct fit, no surprisesMarc D.Verified BuyerMay 28, 2026
Lined up perfectly with the original. Install took about an hour with the right press. Solid feel back in the steering, no more clunk over bumps.
Installed on 2016 Ram 1500
- Shipped fast across CanadaJen P.Verified BuyerMay 14, 2026
Ordered on a Monday, had it by Wednesday in Calgary. Greasable fitting is a nice touch. Quality looks on par with OEM.
Installed on 2014 Chevrolet Silverado 1500
- Good part, double-check your sideSteve R.Verified BuyerApr 30, 2026
Works great so far. Just confirm fitment for your exact trim before ordering — the fitment list on the page was accurate for mine.
Installed on 2017 Ford F-150
- Quiet againAmrit S.Verified BuyerApr 19, 2026
Replaced both sides at the same time. The knocking noise is completely gone. Boot quality feels durable.
Installed on 2015 GMC Sierra 1500
- Would buy againDaniel L.Mar 22, 2026
Second one I've bought from Autrex. Packaging was secure and the part matched the photos exactly.
Installed on 2013 Dodge Durango
Frequently Asked Questions — BFNG S401
What vehicles does the BFNG S401 fit?
The BFNG S401 fits 10 vehicle applications including 2008-2013 BMW M3, 2008-2010 Porsche Cayenne, 1992-2008 Dodge Viper, 2004-2006 Dodge Ram 1500, 2006 Ford GT and 5 more. Check the full fitment list above to confirm your vehicle.
What parts does the BFNG S401 replace?
The BFNG S401 is a direct replacement for 2401, 99401, S401, 2401, 447GC171 and 30 other part numbers. See the full interchange list for all compatible replacements.
What are the shipping options for the BFNG S401?
Shipping options for the BFNG S401 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 S401?
For current pricing on the BFNG S401, please call us at 1-866-461-2787. Availability and final order details are confirmed before checkout is completed.
Is the Thermostat Seal a direct fit replacement?
Yes, the Thermostat Seal by BFNG is designed as a direct fit replacement. Use our vehicle selector to confirm compatibility with your specific vehicle.
What warranty does the Thermostat Seal come with?
The Thermostat Seal comes with the standard BFNG manufacturer warranty. Please check the product specifications for exact warranty terms.
