AISIN THT-005 Engine Coolant Thermostat with Housing and Gasket - Compatible with Select Lexus GS F, GS460, GX460, IS F, IS500, LC500, LS460, LS600h, LX570, RC F Toyota Land Cruiser, Sequoia, Tundra

Well, this one took my breath away. Most people look @ the quality of their purchase. Aisin did not dissappoint. Wow, truly impressed the minute I opened up the box. This is very solidly built. I've replaced several of these throughout the years on different vehicles and they usually feel cheap and flimsy like they're not going to last you. Not this one, the plastic housing is solid and the thermostat and o-rings feel nice and sturdy as well. It has some weight to it, not too excessive though. Perfect fit on my 2010 tundra. This one is a keeper. Thanks Aisin for producing quality products. Definitely worth the cost and recommend.

Same manufacturer as OEM and a perfect fit and performance. My factory one is still working just fine but I'm going to replace it with the water pump. Like how the housing is painted from the factory. Another critical engine protection part that is not worth going cheap.

I purchased this for my Tundra. This is a high quality OEM thermostat in housing. I recommend along with this https://amzn.to/41kSK6J

Perfect fit & function.

OEM style, proper fitment.

Complete your water pump or radiator replacement job with this! Fitment is spot on and so far after 3k miles not one issue! 2008 Toyota Tundra 5.7 4wd.

Works fine. No problems. Good product.

I compared the AISIN THT-005 thermostat to the original out of my 2008 Tundra (5.7l). Where the "Toyota" is on the OEM, there is a sticker covering that spot on this Aisin. The black text on the side of the Aisin matched the original exactly. I replaced the thermostat since I was in there replacing the water pump (the thermostat mounts to the water pump). My temperature gauge runs just below the half way mark at operating temperature like it did with the original thermostat.