Mishimoto Racing Thermostat w/ Housing 70 Deg C Most BMW M52/M54/M56 Engines | Low-Temperature Opening | Cooling System Upgrade

Overview

The Mishimoto Racing Thermostat with Housing is a precision-engineered cooling component designed specifically for BMW M52, M54, and M56 engines. This thermostat is ideal for enthusiasts and tuners who have modified their engines and require enhanced cooling performance to maintain optimal operating temperatures under increased loads. By opening at 70°C (158°F), it allows coolant to circulate earlier than the stock thermostat, improving heat dissipation and reducing the risk of overheating during spirited driving or track use.

Crafted with a focus on durability and reliability, this thermostat comes pre-installed in a robust OEM-quality housing that ensures a perfect fit and seamless integration with your BMW’s cooling system. Mishimoto’s engineering approach emphasizes quality materials and precise calibration to deliver consistent thermal management. The product is backed by Mishimoto’s Lifetime Warranty, reflecting confidence in its long-term performance and build quality.

For BMW owners pushing their M52, M54, or M56 engines beyond stock parameters, this thermostat offers a practical upgrade that enhances cooling efficiency without compromising engine warm-up times excessively. Early coolant flow helps maintain stable temperatures, which is crucial for engine longevity and consistent performance, especially in modified or high-stress applications.

Features & Specifications

This Mishimoto Racing Thermostat with Housing is engineered for BMW M52, M54, and M56 engines and features a 70°C opening temperature. Constructed from OEM-quality materials, it delivers reliable and precise cooling control for BMW enthusiasts seeking improved thermal management and durability.

• Brand: Mishimoto
• Product: Racing Thermostat w/ Housing 70 Deg C
• Part Number: MMTS-E46-99V2
• Fitment: Most BMW M52, M54, M56 Engines (E46, E39, E85 chassis)
• Material: OEM-quality housing with high-grade thermostat components
• Finish: Durable factory finish on housing
• Construction: Pre-installed thermostat in OEM-style housing
• Origin: Not specified
• Opening Temperature: 70°C (158°F)
• Temperature Differential: Opens 27°C (48°F) earlier than stock

Key Benefits

• Cooling Efficiency: Opens earlier to allow coolant flow sooner, reducing engine heat buildup under high load
• Durability: OEM-quality housing ensures long-lasting fitment and resistance to thermal stress
• Fitment: Designed specifically for BMW M52, M54, and M56 engines, ensuring precise compatibility
• Performance Stability: Helps maintain consistent engine temperatures during aggressive driving or track conditions
• Warranty: Backed by Mishimoto’s Lifetime Warranty for peace of mind
• Upgrade Path: Ideal for modified engines requiring enhanced cooling without drastic changes to stock cooling system

What's Included

• 1× Mishimoto Racing Thermostat pre-installed in OEM-quality housing

Installation & Compatibility

Installation of the Mishimoto Racing Thermostat with Housing is generally straightforward for those with basic mechanical skills and standard hand tools. It is a direct replacement for the factory thermostat housing on compatible BMW M52, M54, and M56 engines, requiring no modifications. However, professional installation is recommended if you are unfamiliar with cooling system components or BMW-specific procedures. No special tuning is required after installation, but always verify fitment against your specific chassis and engine variant before purchase.

• Professional Installation: Recommended for best results
• Modifications Required: None
• Verify Compatibility: Confirm fitment for your specific BMW model and engine code

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