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Upgrade your BMW's cooling system with the Mishimoto direct-fit replacement thermostat designed for M52, M54, and M56 engines. This thermostat is engineered to restore optimal engine temperature and cooling performance, ensuring your vehicle runs smoothly and efficiently. Pre-installed in a durable OEM-quality housing, it offers a straightforward replacement process for models including the E46, E39, and E85 chassis. The thermostat opens at the stock temperature of 97°C (approximately 207°F), maintaining proper engine operation under various driving conditions. Included with the thermostat is a high-quality gasket, simplifying installation and ensuring a secure, leak-free fit. As with all Mishimoto cooling products, this thermostat is backed by a lifetime warranty, providing peace of mind and reliable performance over the long term.
Features:
Fitment:
1999 BMW 323i Base
1999 BMW 323is Base
1999 BMW 328i Base
1999 BMW 328is Base
1999 BMW 528i Base
1999 BMW Z3 Coupe
1999 BMW Z3 M Coupe
1999 BMW Z3 M Roadster
1999 BMW Z3 Roadster
2000 BMW 323Ci Base
2000 BMW 323i Base
2000 BMW 328Ci Base
2000 BMW 328i Base
2000 BMW 528i Base
2000 BMW Z3 Coupe
2000 BMW Z3 M Coupe
2000 BMW Z3 M Roadster
2000 BMW Z3 Roadster
2001 BMW 325Ci Base
2001 BMW 325i Base
2001 BMW 325xi Base
2001 BMW 330Ci Base
2001 BMW 330i Base
2001 BMW 330xi Base
2001 BMW 525i Base
2001 BMW 530i Base
2001 BMW X5 3.0i
2001 BMW X5 4.4i
2001 BMW Z3 Coupe
2001 BMW Z3 M Coupe
2001 BMW Z3 M Roadster
2001 BMW Z3 Roadster
2002 BMW 325Ci Base
2002 BMW 325i Base
2002 BMW 325xi Base
2002 BMW 330Ci Base
2002 BMW 330i Base
2002 BMW 330xi Base
2002 BMW 525i Base
2002 BMW 530i Base
2002 BMW X5 3.0i
2002 BMW X5 4.4i
2002 BMW X5 4.6is
2002 BMW Z3 Coupe
2002 BMW Z3 M Coupe
2002 BMW Z3 M Roadster
2002 BMW Z3 Roadster
2003 BMW 325Ci Base
2003 BMW 325i Base
2003 BMW 325xi Base
2003 BMW 330Ci Base
2003 BMW 330i Base
2003 BMW 330xi Base
2003 BMW 525i Base
2003 BMW 530i Base
2003 BMW X5 3.0i
2003 BMW X5 4.4i
2003 BMW X5 4.6is
2003 BMW Z4 2.5i
2003 BMW Z4 3.0i
2004 BMW 325Ci Base
2004 BMW 325i Base
2004 BMW 325xi Base
2004 BMW 330Ci Base
2004 BMW 330i Base
2004 BMW 330xi Base
2004 BMW 525i Base
2004 BMW 530i Base
2004 BMW X3 2.5i
2004 BMW X3 3.0i
2004 BMW X5 3.0i
2004 BMW X5 4.4i
2004 BMW X5 4.8is
2004 BMW Z4 2.5i
2004 BMW Z4 3.0i
2005 BMW 325Ci Base
2005 BMW 325i Base
2005 BMW 325xi Base
2005 BMW 330Ci Base
2005 BMW 330i Base
2005 BMW 330xi Base
2005 BMW 525i Base
2005 BMW 530i Base
2005 BMW X3 2.5i
2005 BMW X3 3.0i
2005 BMW X5 3.0i
2005 BMW X5 4.4i
2005 BMW X5 4.8is
2005 BMW Z4 2.5i
2005 BMW Z4 3.0i
2006 BMW 325Ci Base
2006 BMW 330Ci Base
2006 BMW X3 3.0i
2006 BMW X5 3.0i
2006 BMW X5 4.4i
2006 BMW X5 4.8is
2006 BMW Z4 Coupe 3.0si
2006 BMW Z4 M Coupe
2006 BMW Z4 M Roadster
2006 BMW Z4 Roadster 3.0i
2006 BMW Z4 Roadster 3.0si
Order Processing
All orders are processed and shipped within 24 hours of purchase (excluding weekends and holidays).
Orders placed after 3:00 PM EST may ship the following business day.
Shipping Methods
Customers select their preferred shipping method and speed at checkout.
Shipping times are determined by the carrier and cannot be guaranteed by us.
Tracking information will be provided once your order has shipped.
Shipping Coverage
If your package arrives damaged, please notify the delivery driver immediately and contact the shipping carrier to file a claim.
You must report any missing or damaged items within 14 days of delivery.
After this time, we cannot be held responsible for lost or damaged items.
Return Window
You have 30 days from the date of delivery to request a return.
After 30 days, we are unable to accept returns, exchanges, or refund requests.
Eligibility
Items must be returned in their original condition—unused, unwashed, and with all tags and packaging intact.
Certain products may not be eligible for return (e.g., special-order items, customized products, or perishable goods).
Items that have been altered, installed, or modified cannot be returned.
Return Process
Contact our Customer Support team to request a Return Authorization (RMA) before sending items back.
Once your return is approved, you’ll receive instructions on where to send the product.
Customers are responsible for return shipping costs unless the item was defective or incorrect.
Refunds
Refunds are issued to the original payment method once the returned item has been received and inspected.
Please allow 5–10 business days for the refund to appear on your account.
In some cases, a restocking fee may apply (if applicable, this will be disclosed during your return authorization).
