Mishimoto 99-05 Volkswagen GTI 1.8T Racing Thermostat Part MMTS-GTI-99

The Mishimoto racing thermostat for the 99-05 Volkwagen GTI 1.8T will promote greater cooling efficiency in your stock or modified GTI. Once the engine is fully warmed up, Mishimoto's Volkswagen GTI racing thermostat will open at a lower temperature than standard thermostats. This allows coolant to flow through the engine sooner, which reduces and maintains cooler engine temperatures. The Mishimoto 99-05 Volkwagen GTI 1.8T racing thermostat is the perfect addition to your street or track GTI and is a direct replacement for the stock thermostat. This thermostat includes the signature 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. 1997-2001 Audi A4 Base 1.8 Liter 012, 1997-2001 Audi A4 Base 1.8 Liter 01V, 2003-2006 Audi TT Base 1.8 Liter 09G, 1998 Volkswagen Beetle Base 2.0 Liter 01M, 1998 Volkswagen Beetle Base 2.0 Liter 02J, 1999-2003 Volkswagen Beetle GL 1.8 Liter 01M, 1999-2003 Volkswagen Beetle GL 1.8 Liter 02J, 2003 Volkswagen Beetle GL 1.8 Liter 09G, 1999-2004 Volkswagen Beetle GL 2.0 Liter 01M, 2004 Volkswagen Beetle GL 2.0 Liter 02E, 1999-2005 Volkswagen Beetle GL 2.0 Liter 02J, 2003-2005 Volkswagen Beetle GL 2.0 Liter 09G, 1999-2004 Volkswagen Beetle GLS 1.8 Liter 01M, 2004-2005 Volkswagen Beetle GLS 1.8 Liter 02E, 1999-2005 Volkswagen Beetle GLS 1.8 Liter 02J, 2003-2005 Volkswagen Beetle GLS 1.8 Liter 09G, 1999-2004 Volkswagen Beetle GLS 2.0 Liter 01M, 2004-2005 Volkswagen Beetle GLS 2.0 Liter 02E, 1999-2005 Volkswagen Beetle GLS 2.0 Liter 02J, 2003-2005 Volkswagen Beetle GLS 2.0 Liter 09G, 1999-2004 Volkswagen Beetle GLX 1.8 Liter 01M, 1999-2004 Volkswagen Beetle GLX 1.8 Liter 02J, 2003 Volkswagen Beetle GLX 1.8 Liter 09G, 2001-2002 Volkswagen Beetle Sport 1.8 Liter 01M, 2001-2002 Volkswagen Beetle Sport 1.8 Liter 02J, 2001-2002 Volkswagen Beetle Sport 2.0 Liter 01M, 2001-2002 Volkswagen Beetle Sport 2.0 Liter 02J, 2002-2004 Volkswagen Beetle Turbo S 1.8 Liter 02M, 1998-2005 Volkswagen Golf GL 2.0 Liter 01M, 1999 Volkswagen Golf GL 2.0 Liter 096, 2000-2001 Volkswagen Golf GLS 1.8 Liter 01M, 1999-2005 Volkswagen Golf GLS 2.0 Liter 01M, 2003 Volkswagen Golf GLS 2.0 Liter 09A, 2002 Volkswagen Golf GTI 1.8T 1.8 Liter 01M, 2002-2005 Volkswagen Golf GTI 1.8T 1.8 Liter 02J, 2002-2003 Volkswagen Golf GTI 1.8T 1.8 Liter 02M, 2003-2005 Volkswagen Golf GTI 1.8T 1.8 Liter 09A, 2000-2001 Volkswagen Golf GTI GLS 1.8 Liter 01M, 2000 Volkswagen Golf GTI GLS 2.0 Liter 01M, 1998 Volkswagen Golf K2 2.0 Liter 01M, 1999 Volkswagen Golf Wolfsburg Edition 2.0 Liter 01M, 2003-2005 Volkswagen Jetta GL 1.8 Liter 01M, 2004 Volkswagen Jetta GL 1.8 Liter 09A ...See Application Guide for Additional Fitments

• Lower activation temperature allows coolant to flow through the engine earlier, maintaining lower temperatures (Mishimoto thermostat activates at 180F vs. stock 188.6F)
• Mishimoto Lifetime Warranty
• N/A

Enhance your Volkswagen GTI's cooling performance with the Mishimoto 99-05 VW GTI 1.8T Racing Thermostat. Designed to promote greater cooling efficiency, this thermostat opens at a lower temperature than the stock unit, allowing coolant to flow through the engine sooner once fully warmed. This results in more consistent engine temperatures, improved warm-up times, and reduced risk of overheating, making it ideal for both street driving and track use. Engineered for a precise fit and reliable operation, it is a direct replacement for the factory thermostat, ensuring seamless integration into your vehicle's cooling system. The Mishimoto racing thermostat is built with quality materials, supporting your vehicle's performance under demanding conditions and including the signature Mishimoto Lifetime Warranty for peace of mind. This upgrade is perfect for those looking to optimize their GTI's cooling system without sacrificing reliability or drivability. It is also compatible with a range of other vehicles, including various Audi and Volkswagen models from the late 90s to mid-2000s, broadening its application scope for enthusiasts and mechanics alike. Whether you are modifying your vehicle for performance or maintaining stock conditions, this thermostat offers a significant upgrade to your cooling system. With a lower activation temperature of 180°F compared to the stock 188.6°F, it ensures coolant circulates earlier, maintaining lower operating temperatures and supporting engine longevity. The Mishimoto 99-05 VW GTI 1.8T racing thermostat is a straightforward, high-quality component designed to meet the demands of modern performance vehicles, backed by the brand’s renowned warranty and engineering expertise.

Features:

• Lower activation temperature: Opens at 180°F, promoting earlier coolant flow and maintaining cooler engine temperatures

• Direct replacement: Fits seamlessly into the stock cooling system of 1999-2005 Volkswagen GTI 1.8T and compatible models

• Quality construction: Made with durable materials to ensure long-lasting performance and reliable operation

• Supports performance and longevity: Helps prevent overheating during spirited driving or track sessions

• Mishimoto Lifetime Warranty: Backed by the brand’s trusted warranty for peace of mind

Fitment:
1997 Audi A4 Base
1998 Audi A4 Base
1998 Volkswagen Beetle Base
1998 Volkswagen Golf GL
1998 Volkswagen Golf K2
1998 Volkswagen Jetta GL
1998 Volkswagen Jetta GLS
1998 Volkswagen Jetta GT
1998 Volkswagen Jetta K2
1998 Volkswagen Jetta Wolfsburg Edition
1998 Volkswagen Passat GLS
1999 Audi A4 Base
1999 Volkswagen Beetle GL
1999 Volkswagen Beetle GLS
1999 Volkswagen Beetle GLX
1999 Volkswagen Golf GL
1999 Volkswagen Golf GLS
1999 Volkswagen Golf Wolfsburg Edition
1999 Volkswagen Jetta GL
1999 Volkswagen Jetta GLS
1999 Volkswagen Jetta Wolfsburg Edition
1999 Volkswagen Passat GLS
2000 Audi A4 Base
2000 Volkswagen Beetle GL
2000 Volkswagen Beetle GLS
2000 Volkswagen Beetle GLX
2000 Volkswagen Golf GL
2000 Volkswagen Golf GLS
2000 Volkswagen Golf GTI GLS
2000 Volkswagen Jetta GL
2000 Volkswagen Jetta GLS
2000 Volkswagen Passat GLS
2001 Audi A4 Base
2001 Volkswagen Beetle GL
2001 Volkswagen Beetle GLS
2001 Volkswagen Beetle GLX
2001 Volkswagen Beetle Sport
2001 Volkswagen Golf GL
2001 Volkswagen Golf GLS
2001 Volkswagen Golf GTI GLS
2001 Volkswagen Jetta GL
2001 Volkswagen Jetta GLS
2001 Volkswagen Jetta Wolfsburg Edition
2001 Volkswagen Passat GLS
2002 Volkswagen Beetle GL
2002 Volkswagen Beetle GLS
2002 Volkswagen Beetle GLX
2002 Volkswagen Beetle Sport
2002 Volkswagen Beetle Turbo S
2002 Volkswagen Golf GL
2002 Volkswagen Golf GLS
2002 Volkswagen Golf GTI 1.8T
2002 Volkswagen Jetta GL
2002 Volkswagen Jetta GLS
2002 Volkswagen Passat GLS
2003 Audi TT Base
2003 Volkswagen Beetle GL
2003 Volkswagen Beetle GLS
2003 Volkswagen Beetle GLX
2003 Volkswagen Beetle Turbo S
2003 Volkswagen Golf GL
2003 Volkswagen Golf GLS
2003 Volkswagen Golf GTI 1.8T
2003 Volkswagen Jetta GL
2003 Volkswagen Jetta GLS
2003 Volkswagen Jetta Wolfsburg Edition
2003 Volkswagen Passat GL
2003 Volkswagen Passat GLS
2004 Audi TT Base
2004 Volkswagen Beetle GL
2004 Volkswagen Beetle GLS
2004 Volkswagen Beetle GLX
2004 Volkswagen Beetle Turbo S
2004 Volkswagen Golf GL
2004 Volkswagen Golf GLS
2004 Volkswagen Golf GTI 1.8T
2004 Volkswagen Jetta GL
2004 Volkswagen Jetta GLS
2004 Volkswagen Passat GL
2004 Volkswagen Passat GL TDI
2004 Volkswagen Passat GLS
2004 Volkswagen Passat GLS 4 Motion
2004 Volkswagen Passat GLS TDI
2005 Audi TT Base
2005 Volkswagen Beetle GL
2005 Volkswagen Beetle GLS
2005 Volkswagen Golf GL
2005 Volkswagen Golf GLS
2005 Volkswagen Golf GTI 1.8T
2005 Volkswagen Jetta GL
2005 Volkswagen Jetta GLI
2005 Volkswagen Jetta GLS
2005 Volkswagen Passat GL
2005 Volkswagen Passat GL TDI
2005 Volkswagen Passat GLS
2005 Volkswagen Passat GLS 4 Motion
2005 Volkswagen Passat GLS TDI
2006 Audi TT Base

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