Mishimoto direct-fit replacement thermostat for the BMW M52 / M54 / M56 inline-six (E46, E39, E85 Z4, Z3, X3, X5). It opens at the OEM 97°C temperature to restore stock cooling performance and comes pre-installed in a durable OEM-quality housing with gasket. Backed by the Mishimoto Lifetime Warranty.
| Type | Direct-fit replacement thermostat w/ housing |
| Activation Temp | 97°C (OEM) |
| Engine | BMW M52 / M54 / M56 |
| Includes | OEM-quality housing + gasket |
| Part Number | MMTS-E46-99E |
| 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 |
Shipping: In-stock orders placed before 3 PM EST ship the same day, and everything else ships within 24 hours. Standard, expedited, and overnight options are available at checkout. Backordered items ship as soon as we get them back in stock. Contact us for lead times. See the full Shipping Policy.
Returns: 30-day returns on new, unused items in original packaging. See the full Refund Policy.
