---
product_id: 519760796
title: "AISIN THT-015 Thermostat"
brand: "aisin"
price: "€ 80.26"
currency: EUR
in_stock: true
reviews_count: 5
category: "Aisin"
url: https://www.desertcart.gr/products/519760796-aisin-tht-015-thermostat
store_origin: GR
region: Greece
---

# Critical for peak cooling system performance OE exact Form, Fit & Function Maintains optimal coolant temp ±2°C AISIN THT-015 Thermostat

**Brand:** aisin
**Price:** € 80.26
**Availability:** ✅ In Stock

## Summary

> 🌡️ Stay Cool, Drive Confident: The Thermostat Your Engine Deserves

## Quick Answers

- **What is this?** AISIN THT-015 Thermostat by aisin
- **How much does it cost?** € 80.26 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/519760796-aisin-tht-015-thermostat)

## Best For

- aisin enthusiasts

## Why This Product

- Trusted aisin brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Durability You Can Trust:** Manufactured by AISIN, a top OEM supplier ensuring long-lasting operation
- • **Plug-and-Play Replacement:** Direct OEM part number 90916-03100 for hassle-free upgrade
- • **Optimal Temperature Control:** Keeps your engine coolant perfectly balanced to prevent overheating or inefficiency
- • **Precision Engineered OE Quality:** Exact fit and function for seamless installation and reliability
- • **Enhanced Cooling System Stability:** Minimizes temperature fluctuations for consistent engine performance

## Overview

The AISIN THT-015 Thermostat is an OEM-quality replacement part designed for exact form, fit, and function. It plays a critical role in maintaining your vehicle’s cooling system by regulating coolant temperature within an optimal range, ensuring engine stability and preventing overheating. Trusted by professionals and backed by AISIN’s manufacturing excellence, this thermostat delivers reliable performance and durability for your car’s heart.

## Description

Product Description Thermostats from AISIN are OE manufactured for exact Form, Fit and Function. They contribute to maintaining cooling system performance and are a critical aspect of the cooling system. Thermostats also keep the coolant within the optimal temperature range. Box Contains Thermostat

Review: From the original part manufacturer Aisin. You really can't go wrong with quick shipping from desertcart either. Grade buy!
Review: My Water Pump started leaking on my 2005 Tundra 4.7 It was intermittent for a while, so I just kept the coolant topped up. It started getting worse, so I started ordering all the parts. Water pump, timing belt, ect. I hooked up my OBD scanner to see the actual temperature of the coolant, and it was hovering from 205 to 210, which is hotter than ideal for sure. After a long and exciting repair job, everything is back together, and 2 weeks later, the coolant temp stays at 186-187 consistently. I replaced the water pump, radiator, timing belt, tensioner and drive belt, also, but it's good to know the new Thermostat is working perfectly. I would venture to guess the old one was not Aisin/Toyota. I myself was tempted to get a cheaper one, as the parts list got bigger. But the old thermostat was definitely worn out. The rubber parts were all misshapen and definitely not sealing, or allowing flow like they should. Same with the radiator cap, the rubber was stretched out. So, while I replaced most of the entire cooling system, and the new thermostats effect difficult to say, it good to know it's working perfectly. The temperature would swing +/- 10 degrees when driving around before, now it maybe moves +/- 2. Side note, as many have said before, the dash temperature guage is not very helpful with these things. During the whole fiasco, it never read anything but right in the middle. If you hit 230 or 240 degrees, I'm sure it would let you know, but at that point things are getting bad. I use a $20 Bluetooth obd scanner I got here on desertcart, and it's been a great investment. Has helped me solve several issues.

## Features

- OE manufactured for exact Form, Fit and Function
- Contributes to maintaining cooling system performance
- Critical aspect of the cooling system
- Keeps the coolant within the optimal temperature range

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01LZVUYEZ |
| Best Sellers Rank | 637,146 in Automotive ( See Top 100 in Automotive ) 1,248 in Car Engine Thermostats |
| Brand | AISIN |
| Customer Reviews | 4.6 4.6 out of 5 stars (247) |
| Date First Available | 22 Sept. 2016 |
| Item Weight | 200 g |
| Item model number | THT-015 |
| Manufacturer | AISIN |
| Manufacturer part number | THT-015 |
| Model | AISIN |
| OEM Part Number | 90916-03100 |
| Position | Centre |
| Product Dimensions | 7.62 x 7.62 x 7.11 cm; 199.58 g |

## Images

![AISIN THT-015 Thermostat - Image 1](https://m.media-amazon.com/images/I/816hpM3IRgL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by T***T on 3 December 2025*

From the original part manufacturer Aisin. You really can't go wrong with quick shipping from Amazon either. Grade buy!

### ⭐⭐⭐⭐⭐ Review
*by B***D on 11 November 2023*

My Water Pump started leaking on my 2005 Tundra 4.7 It was intermittent for a while, so I just kept the coolant topped up. It started getting worse, so I started ordering all the parts. Water pump, timing belt, ect. I hooked up my OBD scanner to see the actual temperature of the coolant, and it was hovering from 205 to 210, which is hotter than ideal for sure. After a long and exciting repair job, everything is back together, and 2 weeks later, the coolant temp stays at 186-187 consistently. I replaced the water pump, radiator, timing belt, tensioner and drive belt, also, but it's good to know the new Thermostat is working perfectly. I would venture to guess the old one was not Aisin/Toyota. I myself was tempted to get a cheaper one, as the parts list got bigger. But the old thermostat was definitely worn out. The rubber parts were all misshapen and definitely not sealing, or allowing flow like they should. Same with the radiator cap, the rubber was stretched out. So, while I replaced most of the entire cooling system, and the new thermostats effect difficult to say, it good to know it's working perfectly. The temperature would swing +/- 10 degrees when driving around before, now it maybe moves +/- 2. Side note, as many have said before, the dash temperature guage is not very helpful with these things. During the whole fiasco, it never read anything but right in the middle. If you hit 230 or 240 degrees, I'm sure it would let you know, but at that point things are getting bad. I use a $20 Bluetooth obd scanner I got here on Amazon, and it's been a great investment. Has helped me solve several issues.

### ⭐⭐⭐⭐⭐ Review
*by S***Y on 24 June 2025*

Fits like OEM. Don’t forget to buy gasket! You must buy separately,,,, that part stinks.

## Frequently Bought Together

- AISIN THT-015 Engine Coolant Thermostat - Compatible with Select Lexus GS400, GS430, GX470, LS400, LS430, LX450, LX470, SC400, SC430 Toyota 4Runner, Land Cruiser, Sequoia, Tundra
- AISIN TKT-021 Engine Timing Belt Kit with Water Pump - Compatible with Select Lexus GS400, GS430, GX470, LS400, LS430, LX470, SC400, SC430 Toyota 4Runner, Land Cruiser, Sequoia, Tundra
- Toyota Genuine Thermostat Gasket

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-02-02*