Subaru WRX STI Thermostats and Housings
This page covers thermostats and housings for the Subaru WRX STI, with parts spanning the 2013–2021 model years. The range includes engine coolant thermostats, water outlets, and thermostat housings — OE replacement pieces offered with gaskets where applicable. Select your year above and we'll show only the thermostats and housings that fit your Subaru WRX STI. Fitment is checked against our vehicle data for every part listed.
Derale Performance 15719 Billet Fluid Control Thermostat Kit 1/2" NPT 180°F
Mishimoto MMTS-WRX-01 Racing Thermostat for Subaru WRX/STI
Beck/Arnley Engine Coolant Thermostat - OE Replacement for Foreign Nameplate Vehicles
Motorad 294-140 Engine Coolant Thermostat 140°F Standard-Flow Replacement
What's here for your Subaru WRX STI
- Engine Coolant Thermostats — OE replacement units designed to fit the Subaru WRX STI cooling circuit
- Engine Coolant Water Outlets — the housing section that routes coolant away from the engine block
- Engine Coolant Thermostat Housings — complete housings, some listed with integrated gaskets for a straightforward swap
The widest selection of Subaru WRX STI thermostats and housings here comes from Motorad, MAHLE, Gates, and Dorman. Other categories Subaru WRX STI owners shop for: Subaru WRX STI Springs and Suspension Parts, Subaru WRX STI Shocks and Struts and Subaru WRX STI Manual Transmission Parts, or browse all Subaru WRX STI parts and accessories.