Mishimoto low-temp racing thermostat for the BMW M52 / M54 / M56 inline-six (E46, E39, E85 Z4, Z3, X3, X5). It begins opening at 70°C — about 27°C (48°F) earlier than stock — letting coolant flow into the radiator and shed heat sooner on modified engines. Pre-installed in a durable OEM-quality housing with gasket, backed by the Mishimoto Lifetime Warranty.
Specifications
| Type | Low-temp racing thermostat w/ housing |
| Activation Temp | 70°C (27°C earlier than stock) |
| Engine | BMW M52 / M54 / M56 |
| Includes | OEM-quality housing + gasket |
| Warranty | Lifetime |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1999-2006 | BMW | 323i/325i/328i/330i | Base / Ci / xi |
| 1999-2005 | BMW | 525i/528i/530i | Base |
| 2004-2006 | BMW | X3 | 2.5i / 3.0i |
| 2001-2006 | BMW | X5 | 3.0i |
| 1999-2002 | BMW | Z3 | Roadster / Coupe / M |
| 2003-2006 | BMW | Z4 | 2.5i / 3.0i / 3.0si |
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