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Mishimoto Mishimoto 90-97 Mazda Miata 155 Deg F / 68 Deg C Racing Thermostat
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Mishimoto 90-97 Mazda Miata 155 Deg F / 68 Deg C Racing Thermostat

Mishimoto
MISMMTS-MIA-90L
748666001398
Thermostats
20+ Units In Stock - Ships Next Business Day
$ 76.00 $ 68.95
$ 68.95

SKU: MMTS-MIA-90L | UPC: 748666001398

Mishimoto 90-97 Mazda Miata 155 Deg F / 68 Deg C Racing Thermostat

Replace your stock thermostat with the Mishimoto racing thermostat that opens at 155°F (68°C) to lower engine operating temperatures on 1990-1997 Mazda Miata models. This direct-fit part also works on select Kia Sportage, Mazda 323, 626, B2600, and MX-3 vehicles sharing compatible engines. It enables earlier coolant circulation for better cooling during spirited drives and track sessions while maintaining quick warmup times.

Key Features

  • 155°F Activation: Opens 20-30°F sooner than OEM units to promote constant coolant flow and drop operating temps by up to 20°F
  • High-Flow Design: Larger bypass hole and calibrated spring increase flow rate without restricting pressure
  • Brass Construction: Durable brass body resists corrosion and withstands high-pressure racing conditions
  • Direct OEM Replacement: Bolts into factory housing with no modifications required for seamless integration
  • Included Gasket: Comes with O-ring and gasket for immediate leak-proof installation

Product Notes

  • Pair with Mishimoto radiator hoses and coolant for complete cooling system upgrade
  • Flush cooling system prior to installation to remove debris
  • Box dimensions 3.86 x 3.54 x 1.97 inches weight 0.2 lb ship weight 0.4 lb

Installation Notes

  • Professional installation recommended.
  • Drain coolant completely before removing stock thermostat
  • Torque bolts to OEM specs 8-10 ft-lbs uses factory hardware

This Part Fits

Year Make Model Submodel
1995-2002 Kia Sportage Base
1995-2001 Kia Sportage EX
2001 Kia Sportage Limited
1986-1994 Mazda 323 Base
1986-1988 Mazda 323 DX
1988 Mazda 323 GT
1988-1989 Mazda 323 GTX
1986-1989 Mazda 323 LX
1988-1993 Mazda 323 SE
1988-1992 Mazda 626 DX
1990-1991 Mazda 626 GT
1991 Mazda 626 LE
1988-1992 Mazda 626 LX
1988-1989 Mazda 626 Turbo
1988 Mazda 626 Turbo 4WS
1989-1993 Mazda B2600 Base
1990-1993 Mazda B2600 LE-5
1989 Mazda B2600 LX
1989-1993 Mazda B2600 SE-5
1990-1997 Mazda Miata Base
1993 Mazda Miata LE
1994-1997 Mazda Miata M Edition
1991 Mazda Miata SE
1997 Mazda Miata STO
1992-1995 Mazda MX-3 Base
1992-1994 Mazda MX-3 GS
1993 Mazda MX-3 SE

Why Choose Mishimoto?

  • Backed by lifetime warranty for long-term reliability
  • Tested on dyno and race track for real-world performance
  • Precision-engineered in the USA with global materials

Frequently Asked Questions

  • Q: Will this fit 1990-1993 Mazda Miata 1.6L and 1994-1997 1.8L models?
    A: Yes direct fit for both NA Miata generations using compatible thermostat housing on B6-ZE BP engines
  • Q: What material is the thermostat made from?
    A: Solid brass body with stainless steel spring and EPDM O-ring for corrosion resistance and durability
  • Q: What is the warranty and installation time?
    A: Lifetime warranty against defects 30-60 minute install with basic tools after draining coolant

Shipping & Handling

  • Method: UPS Ground or USPS Priority
  • Availability: In stock - ships same or next business day
  • Packaging: Protective retail box 3.86 x 3.54 x 1.97 inches
  • Weight: 0.2 lb product 0.4 lb shipping

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