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Mishimoto MMTS-GTI-99 Racing Thermostat for VW GTI 1.8T 1999-2005

(Volkswagen Jetta 1998-2005, Beetle 1998-2005, Passat 1998-2005, Golf 1998-2005; Toyota Sienna 2011-19, Pickup 1979-83, C-HR 2018-21 + 10 more models)

Manufacturer

Picture for manufacturer Mishimoto

Part Number

MMTS-GTI-99
10 reviews
Sale Price

$68.95

In Stock (10+)

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Usually delivered within 2 days

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Fitment guaranteed

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Product Details

The Mishimoto MMTS-GTI-99 racing thermostat is engineered to enhance cooling efficiency in 1999-2005 Volkswagen GTI 1.8T engines, whether stock or modified. Designed to open at a lower temperature than OEM thermostats once the engine reaches full operating temperature, this performance upgrade allows coolant to circulate through the engine sooner, effectively reducing and maintaining lower engine temperatures during spirited driving or track use.

Key Features:

  • Lower temperature activation point for improved coolant flow
  • Direct-fit replacement for factory thermostat installation
  • Reduces engine operating temperatures for better performance
  • Ideal for both street-driven and track-ready applications
  • Backed by Mishimoto's Lifetime Warranty

This racing thermostat is an essential cooling system upgrade for GTI enthusiasts looking to optimize engine temperature management and protect against heat-related performance loss. Perfect for turbocharged 1.8T applications where consistent cooling is critical to maintaining power and reliability.

Products specifications

Fits

Volkswagen Jetta 1998-2005, Beetle 1998-2005, Passat 1998-2005, Golf 1998-2005; Toyota Sienna 2011-19, Pickup 1979-83, C-HR 2018-21; Audi TT Quattro 2000-01, A4 1997-2001, TT 2000-06; Saab 9-5 2002-09; Saturn SL2 2000-02, SC2 2000-02 + 4 more models

Installation Difficulty

2

Prop 65

WARNING: Cancer and Reproductive Harm - www.p65warnings.ca.gov

TechSpec Mishimoto Activation Temperature (F)

180

TechSpec Engine Codes

1.8T--2.0L--3.2L VR6

TechSpec OEM Activation Temperature (F)

188.6

TechSpec Applications

1995-2005 Volkswagen GTI 1.8T--2000-2006 Audi TT 1.8T--2004-2006 Audi TT 3.2L--1997-2001 Audi A4 1.8T--1998-2005 Volkswagen Beetle 1.8T, 2.0L--1998-2005 Volkswagen Passat 1.8T--1998-2005 VW Jetta 1.8T, 2.0L--1999-2006 Volkswagen Golf 1.8T, 2.0L

TechSpec Chassis Codes

A4

TechSpec Includes

(1) Mishimoto Thermostat--(1) Rubber O-Ring--Mishimoto Lifetime Warranty

Good price for item

fast and easy to find what i needed

good

no

Thanks

Best prices

Their website is intuitive and easy to maneuver.

First time buying at this wed site and was pretty simple

As I'm not familiar with your company, I was shopping by price and even with a more expensive shipping fee autoplicity.com was the least expensive. The order arrived on time without any problem. I'm very pleased and will order in the future.

Best price for a product I've been shopping for, for months, and when I saw Autoplicity having it for A LOT cheaper, putting the product in my sweet spot price wise, I didn't hesitate to order. <br><br>My bank was a little slow to post the transaction, and I was suprised to get a human on the phone with no effort to make sure my order was properly processed. The gentleman I spoke with was very friendly and promptly answered all my questions. <br><br>Only the $5 I'm getting back for this review can make this deal any better, as I have no suggestion for improving the transaction I made with them.

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