Thermostat Kit
$156.95
BFNG
Part # 5231KT
4.7(47 reviews)Thermostat Kit
Fits Nissan, INFINITI — 50 vehicle applications
$56.32
Only 5 left in stock
1
Express Checkout
Free ShippingOrders $99+
WarrantyManufacturer backed
Easy Returns30-day policy
Canadian OwnedShipped across Canada
Will this fit your vehicle?
Select your vehicle to check fitment.
BFNG 5231KT Vehicle Fitment
Fits 50 vehiclesThis Thermostat Kit fits Nissan, INFINITI vehicles.
2000-2004 Nissan Xterra
1999-2004 Nissan Frontier
1995 Nissan Pickup
1987-2000 Nissan Pathfinder
1987-1988 Nissan 200SX
1986-1994 Nissan D21
1984-1989 Nissan 300ZX
BFNG 5231KT Specifications
- Gasket Quantity
- 0
- Terminal Type
- N/A
- Prop 65
- WARNING: Cancer and Reproductive Harm - www.p65warnings.ca.gov
- Prop 65
- ADVERTENCIA: Riesgo de cáncer y daños reproductivos - www.p65warnings.ca.gov
- Material
- Copper, Stainless Steel, Steel
- Material
- Acero, Acero inoxidable, Cobre
BFNG 5231KT Interchange Numbers
This part replaces and is compatible with the following part numbers
Interchange Numbers
5231KT5231KT5231KT5231KT95231KT5231KTNI5231KT5231KT
BFNG 5231KT Product Description
Manufactured with OEM quality materials and safety standards by an OE Supplier. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant. Offset design, air relief valve, and OEM style seals included where applicable
Key Features
- 100% tested and calibrated
- Consistent and precise response to cooling system needs
- Original equipment design for worry-free direct fit replacement
- Meets or exceeds OEM standards
- High grade stainless steel and copper construction
Manufactured with OEM quality materials and safety standards by an OE Supplier. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant. Offset design, air relief valve, and OEM style seals included where applicable
About BFNG
Shop BFNG Engine Coolant Thermostat Housing Assembly at Autrex with vehicle fitment details, current pricing, and checkout options for the BFNG 5231KT. 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 5231KT
What vehicles does the BFNG 5231KT fit?
The BFNG 5231KT fits 9 vehicle applications including 1999-2004 Nissan Frontier, 2000-2004 Nissan Xterra, 1997-2000 INFINITI QX4, 1987-2000 Nissan Pathfinder, 1995 Nissan Pickup and 4 more. Check the full fitment list above to confirm your vehicle.
What parts does the BFNG 5231KT replace?
The BFNG 5231KT is a direct replacement for 5231KT, 5231KT, 5231KT, 5231KT, 95231KT and 4 other part numbers. See the full interchange list for all compatible replacements.
What are the shipping options for the BFNG 5231KT?
Shipping options for the BFNG 5231KT 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.
How much does the BFNG 5231KT cost?
The BFNG 5231KT is currently listed at $56.32 CAD at Autrex. Final price, shipping, taxes, and availability are confirmed during checkout. Call 1-866-461-2787 if you need help before ordering.
Is the Thermostat Kit a direct fit replacement?
Yes, the Thermostat Kit 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 Kit come with?
The Thermostat Kit comes with the standard BFNG manufacturer warranty. Please check the product specifications for exact warranty terms.
