BMW Thermostat to Water Pump Connecting Hose – OEM Cooling System Replacement for 1 3 5 6 7 Series, Z4, X1, X3 & X5 Models | Replaces Part No. 11537521049

Restore proper coolant flow and long-term cooling system reliability with this OEM replacement Thermostat Coolant Pump Connection Water Hose Pipe for a wide range of BMW E-Chassis applications. Designed to replace factory hose Part No. 11537521049, this component plays an important role in routing coolant between the thermostat and water pump area so the engine can maintain stable operating temperature and dependable cooling performance.

As BMW cooling systems age, factory coolant hoses are exposed to constant heat cycles, pressure fluctuations, and long-term coolant contact. Over time, the hose material and connection points can harden, weaken, swell, or crack, eventually leading to coolant seepage, pressure loss, overheating concerns, and reduced cooling system efficiency. Replacing worn coolant hoses before they fail is one of the smartest preventative maintenance steps you can take to protect the engine and preserve long-term reliability.

This replacement hose is designed to restore the original routing and function of the factory unit, making it a dependable solution whether you are fixing a coolant leak, refreshing an aging cooling system, or replacing original hoses during preventative maintenance. It helps restore confidence in the cooling system while keeping your BMW operating the way it should.

Built for OEM-style fitment, this hose is designed to integrate cleanly with the factory cooling system on compatible 1 Series, 3 Series, 5 Series, 6 Series, 7 Series, X, and Z applications. It is an ideal replacement for owners looking to maintain proper coolant flow, dependable sealing, and long service life in a critical part of the engine bay.

Key Features:

• Direct OEM Replacement: Designed to replace the factory thermostat coolant pump connection water hose pipe on compatible BMW applications.
• Restores Proper Coolant Flow: Helps maintain stable coolant circulation and proper engine operating temperature.
• Supports Cooling System Reliability: A smart replacement when addressing coolant leaks, aging hoses, or preventative maintenance.
• Helps Prevent Leaks and Overheating: Replacing worn hoses can help reduce the risk of coolant loss and temperature-related engine issues.
• OEM-Style Fitment: Built to match the original hose routing and installation layout on compatible BMW applications.
• Durable Automotive-Grade Construction: Designed to withstand repeated heat cycles, coolant pressure, and long-term engine bay exposure.
• Ideal for Repairs and Preventative Maintenance: A simple but important cooling system replacement for preserving long-term dependability.

FITMENT:

• BMW 1 Series – E81 3 Door Hatchback (02/2006–12/2011)
• BMW 1 Series – E87 5 Door Hatchback (03/2005–02/2007)
• BMW 1 Series – E87 LCI 5 Door Hatchback (01/2006–06/2011)
• BMW 1 Series – E82 Coupe (12/2006–10/2013)
• BMW 1 Series – E88 Convertible (11/2006–10/2013)
• BMW 3 Series – E90 Sedan (02/2004–09/2008)
• BMW 3 Series – E90 LCI Sedan (07/2007–12/2011)
• BMW 3 Series – E91 Touring (02/2004–08/2008)
• BMW 3 Series – E91 LCI Touring (07/2007–05/2012)
• BMW 3 Series – E92 Coupe (05/2005–02/2010)
• BMW 3 Series – E92 LCI Coupe (09/2009–06/2013)
• BMW 3 Series – E93 Convertible (09/2005–02/2010)
• BMW 3 Series – E93 LCI Convertible (07/2009–10/2013)
• BMW 5 Series – E60 Sedan (07/2004–02/2007)
• BMW 5 Series – E60 LCI Sedan (11/2005–12/2009)
• BMW 5 Series – E61 Touring (07/2004–02/2007)
• BMW 5 Series – E61 LCI Touring (11/2005–05/2010)
• BMW 6 Series – E63 Coupe (02/2004–07/2007)
• BMW 6 Series – E63 LCI Coupe (04/2006–07/2010)
• BMW 6 Series – E64 Convertible (03/2004–07/2007)
• BMW 6 Series – E64 LCI Convertible (04/2006–07/2010)
• BMW 7 Series – E65 Sedan SWB (06/2004–07/2008)
• BMW 7 Series – E66 Sedan LWB (07/2004–07/2008)
• BMW X1 – E84 SUV (09/2008–08/2011)
• BMW X3 – E83 LCI SUV (02/2006–08/2010)
• BMW X5 – E70 SUV (02/2006–03/2010)
• BMW Z4 – E85 Roadster (10/2004–08/2008)
• BMW Z4 – E86 Coupe (10/2005–08/2008)
• BMW Z4 – E89 Roadster (01/2008–08/2011)

Compatible with BMW applications using thermostat coolant pump connection water hose pipe 11537521049. If you’re unsure whether this hose fits your specific vehicle, please contact us with your VIN and we’ll be happy to verify compatibility before you order.

REPLACES PART NO.: 11537521049

Please refer to the “Fitment” section in the product description for compatibility details.