Mishimoto racing thermostat for the BMW N52 / N54 / N55 inline-six (128i, 135i, 1M, 328i, 335i, 525i–530i, X1, X3, X5, X6, Z4). It opens at a lower temperature than stock, letting coolant flow through the engine sooner to reduce and maintain cooler temperatures. Direct-fit replacement, backed by the Mishimoto Lifetime Warranty.
Specifications
| Type | Racing thermostat |
| Activation Temp | Opens earlier than stock |
| Engine | BMW N52 / N54 / N55 |
| Part Number | MMTS-E90-07 |
| Warranty | Lifetime |
| Application | BMW N52/N54/N55 (see fitment) |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2011 | BMW | 1 Series M | Base |
| 2008-2013 | BMW | 128i / 135i | Base |
| 2004-2013 | BMW | 325i/328i/330i/335i | Base / xi / is |
| 2004-2010 | BMW | 525i/528i/530i | Base / xi |
| 2006-2014 | BMW | X1 / X3 / X5 / X6 | xDrive35i / 3.0si |
| 2005-2014 | BMW | Z4 | 3.0i / 3.0si / sDrive35i |
Shipping
- Orders placed before 3 PM EST typically ship the same business day. Larger items ship within 1 to 3 business days.
- Standard, expedited, and overnight options at checkout.
- Oversized items ship by freight and take longer.
- Special order items follow a lead time we confirm with you individually before the order is committed.
- Backordered items ship as soon as stock lands. Lead times are manufacturer estimates and can change. Contact us for current ETAs.
- Need to cancel? Email us right away. Cancellations are not guaranteed once an order is in process. In-stock orders cancel free before they ship; a 6% fee applies only to confirmed backorders and special orders.
- International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.
Returns
- 30 days from delivery to request and ship back a return on new, uninstalled items in original packaging with all hardware.
- Standard returns: 8% restocking fee on the item price before tax and shipping. Shipping is not refunded in either direction. All waived if the item is defective or we made the error.
- Fitment guaranteed: select your vehicle above, or confirm fitment with us in writing before you order. If the part shows as a fit and it is wrong, the return is on us, even after installation. Otherwise, installed or used parts cannot be returned.
- Final sale: special orders, coilovers, electronics, engine internals, turbochargers, superchargers and turbo kits, unless defective or we sent the wrong item.
- Product images may be representative. The SKU and specifications in the listing are what ships.
- Email us for return authorization before shipping anything back.
Full details: Shipping Policy · Returns & Refunds · Warranty
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