BMW M52, M54, M56 Engines Racing Thermostat
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Mishimoto has developed a racing thermostat engineered specifically for the 1999–2006 BMW E46 323i / 325i / 328i / 330i. The Mishimoto BMW E46 Thermostat fits all M52 / M54 / M56 engines. It will promote greater cooling efficiency throughout your engine. Mishimoto racing thermostats will significantly lower high engine temperature produced by modified and upgraded M52 / M54 / M56 engines. Once the engine is fully warmed up the Mishimoto Racing E46 Thermostat will open up at a lower temperature than the stock thermostat, allowing the coolant to flow through the engine sooner thus reducing and maintaining cooler engine temperatures. And improving long term reliability of your vehicle’s cooling components.
Mishimoto Automotive (“Mishimoto”) warrants its products under this lifetime limited warranty policy (“Warranty Policy”). This Warranty Policy applies solely to: (i) Mishimoto Products purchased directly from Mishimoto or Mishimoto authorized dealers (each a “Mishimoto Product” and collectively, the “Mishimoto Products”) and (ii) the original purchaser of such Mishimoto Product (“Purchaser”). This Warranty Policy is non-transferable and all claims under this Warranty Policy must be accompanied by the original sales receipt. The terms and conditions of this Warranty Policy are subject to change by Mishimoto at any time without notice.
For our complete warranty policy, please click here.
Vehicle must be equipped with stock plastic thermostat housing (Genuine BMW 11537509227) in order to install this thermostat.The metal pin must be carefully removed from the Mishimoto thermostat with pliers before installed into plastic thermostat housing.
OEM Activation Temp C
OEM Activation Temp F
(1) Mishimoto Thermostat(1) Centering PinMishimoto Lifetime Warranty
Install Torque Specs
7 ft/lbs for the three T30 bolts which secure the plastic housing components
E46E39E60E53E83E85E86E36 (Z3 models only)
1999–2000 BMW 328i (all body types)1999–2000 BMW 323i (all body types)2001–2005 BMW 325i (all body types)2001–2006 BMW 330i (all body types)1999–2000 BMW 528i (all body types)2001–2005 BMW 530i (all body / chassis types)2001–2006 BMW X5 (6cyl engine only)2004–2006 BMW X31999–2002 BMW Z32003–2006 BMW Z4
Mishimoto Activation Temp (Fahrenheit)
Mishimoto Activation Temp (Celsius)
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