Search  for anything...

Stant Superstat Premium Thermostat, stainless steel

  • Based on 414 reviews
Condition: New
Checking for product changes

Buy Now, Pay Later


As low as $3 / mo
  • – 4-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout. Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Free shipping on this product

This item is eligible for return within 30 days of receipt

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: In Stock.
Fulfilled by Amazon

Arrives Saturday, Dec 28
Order within 11 hours and 42 minutes
Available payment plans shown during checkout

Features

  • Premium Superstat thermostat.
  • Uses high venturi for maximum cooling capacity during high temperature, high load oepration.
  • 25% larger piston in diameter that delivers 1 1/2 the power of standard thermostats.
  • Stanless steel flange is burnished to a bright finish for stress relief and added corrosion resistance.
  • Thicker flange.
  • Fit type: Vehicle Specific

Manufacturer: ‎Stant


Brand: ‎Stant


Model: ‎Superstat ® Premium Thermostat


Item Weight: ‎1.6 ounces


Product Dimensions: ‎5.4 x 2.9 x 0.9 inches


Country of Origin: ‎China


Item model number: ‎45849


Is Discontinued By Manufacturer: ‎No


Exterior: ‎Machined


Manufacturer Part Number: ‎45849


OEM Part Number: ‎45849


Date First Available: November 11, 2005


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Dec 28

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Does the job
Needed to replaced, so, initially, I got one at the local parts store, but still needed the rubber gasket. After looking at reviews for the one I bought, I found it had terrible reviews. I bought this one, which was cheaper than the one from the parts store! I ordered the corresponding gasket and installed. It is holding perfect temperature, and I'm sure the Stant will hold up great over time. ... show more
Reviewed in the United States on September 11, 2023 by girl

  • Much better quality thermostat
Don't buy the 'regular' thermostats' because your car's cooling system is very important. This 'Superstat' controls the engine temp far better that the original and keeps the engine temp more constant -- My car has a digital temp readout and the engine temperature variance is much better.
Reviewed in the United States on August 29, 2023 by Dana Derderian

  • Great
It was a exact fit for my vehicle
Reviewed in the United States on June 19, 2023 by Jesse L. Ritter

  • It showed the rubber gasket as part of what is needed and it did not come with the package.......
It showed the rubber gasket as part of what is needed and it did not come with package.....
Reviewed in the United States on July 25, 2023 by Earl Wahl

  • These work great! (remember to get a gasket too)
Short version: These work great, quick to warm up and stable temp, nice hot heater - even at 0F / -20C outside. Remember to also replace the gasket and radiator cap, and have a little bit of spare antifreeze to top off the level when finish. If you have dex-cool in your engine, make sure you use dex-cool! Replacing the thermostat, gasket and radiator cap resolved an issue I was having where the engine would take a long time to warm up, and the temp would drop on the open road, and the heater wasn't great either. I'm not sure which of those three parts may have been at fault, but if you're servicing your cooling system they're a few dollars and worth replacing. I did discover the gasket had been damaged either due to being incorrectly installed or not quite the right size. The thermostat from Stant didn't include a gasket, I would suggest replacing the gasket as well, so be sure to get one either from Amazon or from the local auto parts shop. Here in Alaska with outside temps already getting down to 0F / -20C the engine gets upto operating temp quickly and stays with-in a few degrees of 195F, heater is nice and hot too! Note: You always want to use the hottest thermostat you can (with-out going beyond the engines specifications) - this improves efficiency - lowering the combustion chamber temp robs heat energy from the combustion process and as a result you get less power. Yes cooler intake air will result in more power because it is denser and holds more oxygen - not an engine that is running cold. ... show more
Reviewed in the United States on October 28, 2012 by Lonney

  • Gasket Fitment
Looked almost as good as the replaced thermostat, but the gasket fit loosely. I was not sure this could be an issue in the future.. now almost a year later the 3800 V6 engine on the Pontiac has been running at normal operating temperature.
Reviewed in the United States on November 1, 2022 by Simri

  • Seems fine
Works good
Reviewed in the United States on December 25, 2022 by Adam Trivette

  • No gasket
This thermostat cured my car’s problem with not reaching operating temperature. Old thermostat had failed open and in winter car never warmed up all the way. However, it does not come with the gasket or seal. You will need one. Since the old one will be brittle and not useable. I ended up using some o rings in a pinch to get my car back up and running again. ... show more
Reviewed in the United States on April 23, 2020 by Philip Ashcraft

Can't find a product?

Find it on Amazon first, then paste the link below.