---
product_id: 422781407
title: "Thermostat Assembly - RT1254"
brand: "motorcraft"
price: "¥7118"
currency: JPY
in_stock: true
reviews_count: 13
category: "Motorcraft"
url: https://www.desertcart.jp/products/422781407-thermostat-assembly-rt1254
store_origin: JP
region: Japan
---

# Reliable overheating fix Quick 15-min install Precision OEM fit Thermostat Assembly - RT1254

**Brand:** motorcraft
**Price:** ¥7118
**Availability:** ✅ In Stock

## Summary

> 🔥 Keep your engine cool, your drive hot! ⚙️

## Quick Answers

- **What is this?** Thermostat Assembly - RT1254 by motorcraft
- **How much does it cost?** ¥7118 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/422781407-thermostat-assembly-rt1254)

## Best For

- motorcraft enthusiasts

## Why This Product

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

## Key Features

- • **Durability That Lasts:** Painted exterior and premium materials ensure long-term performance through all seasons.
- • **Top-Rated Reliability:** Join thousands of satisfied drivers with a 4.7-star rating and counting.
- • **Proven Overheat Solution:** Instantly resolves overheating issues—no leaks, no fuss, just smooth rides.
- • **OEM-Engineered Excellence:** Trust the #3 ranked thermostat for flawless engine temperature control.
- • **Swift & Simple Installation:** Get back on the road in 15 minutes with a perfect fit and included gasket.

## Overview

The Motorcraft Thermostat Assembly RT1254 is a precision OEM replacement part designed for reliable engine temperature regulation. With a compact 6x7x3 inch size and lightweight 2.89 oz build, it installs quickly in about 15 minutes and includes a new gasket for a perfect seal. Highly rated (#3 in Automotive Replacement Engine Thermostats) and trusted by thousands, it prevents overheating and ensures optimal engine performance across all driving conditions.

## Description

Motorcraft Thermostat Assembly - RT1254

Review: Excellent Motorcraft Part - Worked perfectly for my 2010 F150. Easy and quick install. The recommended thermostat. It replaced an aftermarket brand that failed. I have decided that it’s always best to use the OEM parts on my truck.
Review: Instant fix and repair choice - I installed this Motircraft thermostat into my daughter’s 2003 Ford Explorer with a V8 that was overheating but with no leak in the system. It came with a new rubber gasket and fit perfect. It fixed the problem immediately. It came on time and was a great price. Only took probably 15 minutes to replace. I would definitely use this company again for my other cars. It has been 6 months through warm weather of California and it’s been working great and no overheating issues at all.

## Features

- Item Package Dimension: 4.25L x 2.36W x 2.20H inches
- Item Package Weight - 0.15 Pounds

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09GW9X6Q6 |
| Best Sellers Rank | #8,588 in Automotive ( See Top 100 in Automotive ) #3 in Automotive Replacement Engine Thermostats |
| Brand | Motorcraft |
| Customer Reviews | 4.7 4.7 out of 5 stars (396) |
| Date First Available | September 22, 2021 |
| Exterior | Painted |
| Item Weight | 2.89 ounces |
| Item model number | RT1254 |
| Manufacturer | Motorcraft |
| Manufacturer Part Number | RT1254 |
| Model | RT1254 |
| Product Dimensions | 6 x 7 x 3 inches |

## Images

![Thermostat Assembly - RT1254 - Image 1](https://m.media-amazon.com/images/I/71dUFesVQcL.jpg)

## Questions & Answers

**Q: Does this Motorcraft Thermostat come with a replacement Gasket ?**
A: No, the gasket is sold separately.  It is part number RG571.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent Motorcraft Part
*by B***E on December 21, 2025*

Worked perfectly for my 2010 F150. Easy and quick install. The recommended thermostat. It replaced an aftermarket brand that failed. I have decided that it’s always best to use the OEM parts on my truck.

### ⭐⭐⭐⭐⭐ Instant fix and repair choice
*by K***Y on July 23, 2025*

I installed this Motircraft thermostat into my daughter’s 2003 Ford Explorer with a V8 that was overheating but with no leak in the system. It came with a new rubber gasket and fit perfect. It fixed the problem immediately. It came on time and was a great price. Only took probably 15 minutes to replace. I would definitely use this company again for my other cars. It has been 6 months through warm weather of California and it’s been working great and no overheating issues at all.

### ⭐⭐⭐⭐⭐ OEM Motorcraft thermostat
*by W***S on October 14, 2025*

Replaced this thermostat while doing an intake manifold swap and decided to stick with Motorcraft for peace of mind. Fit was spot on and installation went smoothly. Everything lined up perfectly with no leaks or issues. It’s a solid OEM part — you can tell the quality difference compared to some of the aftermarket stuff out there. Engine temps have been right where they should be since the install. If you’re already doing work under the hood, this is a great time to throw one of these in. Genuine part, great fit, no hassle.

## Frequently Bought Together

- Motorcraft Thermostat Assembly - RT1254
- Motorcraft PW423 New Water Pump Medium
- Motorcraft RG-571 Seal - Thermostat

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**Shop now:** [https://www.desertcart.jp/products/422781407-thermostat-assembly-rt1254](https://www.desertcart.jp/products/422781407-thermostat-assembly-rt1254)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-10*