Mishimoto misMMTS-E46-99E BMW M52/M54/M56 Direct-Fit Replacement Thermostat with Housing

Mishimoto has developed a direct-fit replacement thermostat for the BMW M52, M54, and M56 engines. This Mishimoto thermostat is the ideal replacement for your failed stock thermostat. Our thermostat comes pre-installed in a durable OEM-quality housing and fits many BMWs including E46, E39, and E85 chassis. Like all Mishimoto cooling products, this BMW M52, M54, and M56 thermostat is backed by our Mishimoto Lifetime Warranty. Engine coolant thermostat designed to regulate coolant flow and maintain optimal operating temperature. Ensures efficient warm-up, prevents overheating, and supports reliable performance with a precise fit.

• Opens at stock temperature to restore cooling system performance
• Thermostat pre-installed in OEM-style housing
• Includes thermostat housing gasket

The Mishimoto misMMTS-E46-99E is a direct-fit replacement thermostat designed for BMW M52, M54, and M56 engines. The thermostat regulates coolant flow to support efficient warm-up, help prevent overheating, and maintain optimal engine operating temperature. It opens at the stock temperature and is pre-installed in a durable OEM-quality housing for a precise replacement installation.

This replacement thermostat includes a thermostat housing gasket and is intended for many BMW applications, including E46, E39, and E85 chassis. Listed fitment includes the 1999–2002 BMW Z3 and the 2001–2003 BMW 330i and 330xi. The thermostat is backed by Mishimoto's Lifetime Warranty.

Key Features and Performance Benefits

• Direct-fit replacement supports a precise installation.
• Stock-temperature opening helps restore cooling system performance.
• OEM-quality housing provides a durable replacement assembly.
• Coolant flow regulation supports efficient warm-up and reliable operating temperature control.

Key Product Specifications and Technical Data

• Brand: Mishimoto
• Part Number: misMMTS-E46-99E
• Product Type: Automotive thermostat
• Application: BMW M52, M54, and M56 engines
• Thermostat Temperature: 97 degrees C
• Housing: Thermostat pre-installed in OEM-quality housing
• Gasket: Thermostat housing gasket included
• Warranty: Mishimoto Lifetime Warranty

What's Included

• Thermostat pre-installed in housing
• Thermostat housing gasket

Fitment

Fits 1999–2002 BMW Z3, 2001–2003 BMW 330i, and 2001–2003 BMW 330xi applications listed by the supplier.

Fitments:
1999 BMW 323i Base
1999 BMW 323is Base
1999 BMW 328i Base
1999 BMW 328is Base
1999 BMW 528i Base
1999 BMW Z3 Coupe
1999 BMW Z3 M Coupe
1999 BMW Z3 M Roadster
1999 BMW Z3 Roadster
2000 BMW 323Ci Base
2000 BMW 323i Base
2000 BMW 328Ci Base
2000 BMW 328i Base
2000 BMW 528i Base
2000 BMW Z3 Coupe
2000 BMW Z3 M Coupe
2000 BMW Z3 M Roadster
2000 BMW Z3 Roadster
2001 BMW 325Ci Base
2001 BMW 325i Base
2001 BMW 325xi Base
2001 BMW 330Ci Base
2001 BMW 330i Base
2001 BMW 330xi Base
2001 BMW 525i Base
2001 BMW 530i Base
2001 BMW X5 3.0i
2001 BMW X5 4.4i
2001 BMW Z3 Coupe
2001 BMW Z3 M Coupe
2001 BMW Z3 M Roadster
2001 BMW Z3 Roadster
2002 BMW 325Ci Base
2002 BMW 325i Base
2002 BMW 325xi Base
2002 BMW 330Ci Base
2002 BMW 330i Base
2002 BMW 330xi Base
2002 BMW 525i Base
2002 BMW 530i Base
2002 BMW X5 3.0i
2002 BMW X5 4.4i
2002 BMW X5 4.6is
2002 BMW Z3 Coupe
2002 BMW Z3 M Coupe
2002 BMW Z3 M Roadster
2002 BMW Z3 Roadster
2003 BMW 325Ci Base
2003 BMW 325i Base
2003 BMW 325xi Base
2003 BMW 330Ci Base
2003 BMW 330i Base
2003 BMW 330xi Base
2003 BMW 525i Base
2003 BMW 530i Base
2003 BMW X5 3.0i
2003 BMW X5 4.4i
2003 BMW X5 4.6is
2003 BMW Z4 2.5i
2003 BMW Z4 3.0i
2004 BMW 325Ci Base
2004 BMW 325i Base
2004 BMW 325xi Base
2004 BMW 330Ci Base
2004 BMW 330i Base
2004 BMW 330xi Base
2004 BMW 525i Base
2004 BMW 530i Base
2004 BMW X3 2.5i
2004 BMW X3 3.0i
2004 BMW X5 3.0i
2004 BMW X5 4.4i
2004 BMW X5 4.8is
2004 BMW Z4 2.5i
2004 BMW Z4 3.0i
2005 BMW 325Ci Base
2005 BMW 325i Base
2005 BMW 325xi Base
2005 BMW 330Ci Base
2005 BMW 330i Base
2005 BMW 330xi Base
2005 BMW 525i Base
2005 BMW 530i Base
2005 BMW X3 2.5i
2005 BMW X3 3.0i
2005 BMW X5 3.0i
2005 BMW X5 4.4i
2005 BMW X5 4.8is
2005 BMW Z4 2.5i
2005 BMW Z4 3.0i
2006 BMW 325Ci Base
2006 BMW 330Ci Base
2006 BMW X3 3.0i
2006 BMW X5 3.0i
2006 BMW X5 4.4i
2006 BMW X5 4.8is
2006 BMW Z4 Coupe 3.0si
2006 BMW Z4 M Coupe
2006 BMW Z4 M Roadster
2006 BMW Z4 Roadster 3.0i
2006 BMW Z4 Roadster 3.0si

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: t
Units Per Sku: 1