-9%
Mishimoto Mishimoto 90-97 Mazda Miata 155 Deg F / 68 Deg C Racing Thermostat
Click to zoom in

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

Request For Information

Have questions about Mishimoto 90-97 Mazda Miata 155 Deg F / 68 Deg C Racing Thermostat? Fill out the form below and we'll get back to you by the next business day.
Cooling

Cooling

Cooling system parts and accessories for HEMI, Hellcat, Trackhawk, Duramax, Cummins, and import performance builds are stocked at Black Ops Auto Works. Shop radiators, thermostats, thermostat housings, water pumps, coolant reservoirs, expansion tanks, radiator hoses, oil coolers, transmission coolers, fans and shrouds, and thermal wrap for street, track, towing, and diesel platforms. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 2116 Cooling SKUs across radiator, thermostat, water pump, hose, and heat management categories. What This Category Covers The Cooling category groups together every part that keeps engine, transmission, and charge air temperatures in check under real driving load. Coverage spans aluminum performance radiators, billet thermostat housings, high flow water pumps, silicone radiator hose kits, coolant reservoirs and expansion tanks, oil and transmission co...

View Cooling Products
Engine

Engine

Engine parts and engine bay upgrades for Dodge, Jeep, RAM, Chrysler, Chevrolet, Ford, Toyota, Nissan, Subaru, and Honda vehicles are stocked at Black Ops Auto Works. Shop oil catch cans, supercharger pulleys, thermostats, radiators, cooling parts, throttle bodies, intake manifolds, headers, ignition coils, spark plugs, sensors, gaskets, fuel pumps, valve covers, engine covers, billet cap covers, and full engine bay dress-up parts for HEMI, Hellcat, Trackhawk, Redeye, Demon, Scat Pack, RAM TRX, LS, LT, Coyote, EcoBoost, K-Series, and 2JZ builds. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 14,298 engine SKUs across performance, cooling, oil control, ignition, and appearance categories. What This Category Covers The Engine collection combines OEM-replacement engine service parts with performance aftermarket upgrades for supercharged, turbocharged, and naturally aspirated builds...

View Engine Products
Mishimoto

Mishimoto

Mishimoto performance parts for Jeep, RAM, Dodge, Chevy, Ford, Toyota, Honda, BMW, and Nissan platforms are stocked at Black Ops Auto Works. Shop Mishimoto radiators, intercoolers, oil coolers, transmission coolers, baffled catch cans, silicone hose kits, thermostats, water pumps, cold air intakes, wheel spacers, and fabrication fittings for Hellcat, Trackhawk, HEMI, Cummins diesel, EcoBoost, and Coyote engine builds. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 2,065 Mishimoto SKUs across cooling, intake, oil control, and fabrication categories. What This Brand Covers Mishimoto built its name on performance cooling and has grown into a full engine bay parts brand. This collection spans direct fit radiators, universal intercoolers, oil and transmission coolers, catch cans, silicone hoses, thermostats, water pumps, wheel accessories, and small fabrication parts like fittings a...

View Mishimoto Products
Thermostats

Thermostats

Thermostats are stocked at Black Ops Auto Works for performance projects and dependable replacement work. Thermostats and housings control coolant flow so an engine reaches and maintains its intended operating temperature. Shop OE-style thermostats, low-temperature performance thermostats, billet housings, thermostat seals, gaskets, bypass parts and complete housing assemblies for LS, Coyote, Hemi, K-series, 2JZ, RB, EJ and Ford Modular engines. Every product is filterable by year, make, model, trim, engine and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 111 thermostats products across street, truck, track, restoration and custom-build applications. What This Thermostats Collection Covers This collection serves performance cars, trucks, Jeeps, diesel pickups and engine-swap builds. Verify engine family, coolant outlet design, thermostat temperature, housing angle, seal style and any bypass system before selecting a replacement or upgrade. Th...

View Thermostats Products
Military & First Responder Discounts

Military & First Responder Discount Program

Black Ops Auto Works proudly honors active duty military, veterans, National Guard, reserves, police officers, firefighters, and EMTs with an exclusive 5% discount on all performance parts and carbon fiber upgrades. Verify instantly and start saving today.

Learn More & Apply

Your cart

×