Vehicle Set: Click here to shop 2003 Subaru Legacy parts.

2003 Subaru Legacy Thermostats

Looking for aftermarket parts to modify or upgrade your 2003 Subaru Legacy with thermostats? At Tunersports.com we carry a huge selection of the top name brand performance thermostat parts and accessories.

Thermostat Parts:

Only show in-stock parts

Gates Thermostats

IN STOCK 34012 Gates 02-14 Subaru WRX Thermostat 1990-2004 Subaru Legacy L 1996-2006 Subaru Legacy GT 2003-2003 Subaru Legacy L SE $45.64 Details

Mishimoto Thermostats

IN STOCK - LOW MMTS-WRX-01 The Mishimoto racing thermostat for the 2001+ Subaru Impreza WRX and STI will promote greater cooling efficiency throughout your engine.The Mishimoto racing thermostat will significantly lower high engine temperature produced by modified and upgraded turbo applications.Once the engine is fully warme... Mishimoto 01-07 Subaru WRX / WRX STi 68 Degree Celsius Racing Thermostat 1996-2004 Subaru Legacy GT / L 2003-2003 Subaru Legacy L SE $83.28 Details