Mishimoto 97°C Direct-Fit Thermostat w/ Housing - BMW M52/M54/M56 (E46/E39/Z3/Z4)

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.

Specifications

This part fits:

Shipping

• In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
• Standard, expedited, and overnight options at checkout.
• Oversized items ship by freight and take longer.
• Backordered items ship as soon as stock lands — contact us for lead times.
• 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-day returns on new, uninstalled items in original packaging with all hardware.
• Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
• Installed or used parts can’t be returned — confirm fitment before you install.
• Special orders and custom items are final sale.
• Email us for return authorization before shipping anything back.

Full details: Shipping Policy · Refund Policy