Mishimoto 99-05 VW GTI 1.8T 180 Degree Racing Thermostat

SKU: MMTS-GTI-99 | UPC: 748354026986

Mishimoto 99-05 VW GTI 1.8T 180 Degree Racing Thermostat

The Mishimoto 180 Degree Racing Thermostat delivers precise cooling control for 1999-2005 Volkswagen GTI 1.8T and a wide range of Audi A4 TT Beetle Golf Jetta Passat models with 1.8T and 2.0L engines. This direct-fit upgrade opens at 180°F to promote faster warm-up lower operating temperatures and consistent performance during spirited driving. Engineered as an OEM replacement it installs without modifications for immediate results.

Key Features

• 180°F Opening Temperature: Activates sooner than stock 192-203°F thermostats to circulate coolant faster reduce hot spots and maintain optimal engine temps under load
• Direct OEM Fitment: Bolts directly into factory housing on 1.8T transverse engines no cutting or adapters required for seamless integration
• Cast Aluminum Housing: Lightweight durable construction with corrosion-resistant finish withstands high-pressure cooling systems for long-term reliability
• Stainless Steel Spring: High-tensile strength ensures consistent sealing and opening pressure across thousands of heat cycles
• High-Flow Wax Pellet: Brass-encased pellet responds quickly to temperature changes for precise regulation and extended service life

Product Notes

• MPN MMTS-GTI-99 compatible with transmission codes 01M 02J 09G and others listed in fitment guide
• Refill with OEM-spec coolant after installation to prevent air pockets
• Packaged weight 0.55 lbs shipping box dimensions 5.5 x 4.5 x 3.5 inches

Installation Notes

• Professional installation recommended.
• Drain coolant system before removal of stock thermostat
• OEM gasket or silicone sealant compatible no additional hardware needed

This Part Fits

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

Why Choose Mishimoto?

• Decades of experience engineering cooling solutions for VW Audi enthusiasts worldwide
• Direct-fit parts tested on real vehicles for flawless compatibility and gains
• Lifetime warranty covers defects ensuring peace of mind on every drive

Frequently Asked Questions

• Q: Will this fit my 2003 VW Golf GTI 1.8T with 02J transmission?
  A: Yes it is a direct replacement for all listed 1.8T models including Golf GTI 2002-2005 with 02J 01M or 09A transmissions
• Q: What material is the thermostat housing made from?
  A: Cast aluminum housing paired with brass pellet and stainless steel spring for strength and heat resistance
• Q: What warranty comes with this thermostat?
  A: Mishimoto provides a lifetime warranty against manufacturing defects when installed and used properly

Shipping & Handling

• Method: UPS Ground or USPS Priority
• Availability: In stock – ships same or next business day
• Packaging: Protective retail box 5.5 x 4.5 x 3.5 inches
• Weight: 0.55 lbs