BMW E7X X5/X5M Engine Auxiliary Radiator – Part No. 17117586544 – Restores Cooling System & Fixes Coolant Leaks

Maintain peak cooling performance in your BMW X5 or X5M with this high-quality Engine Auxiliary Radiator, engineered as a direct OEM-style replacement for Part No. 17117586544. This radiator plays a critical role in supporting your main cooling system—especially on high-performance and turbocharged BMW engines, where additional heat management is essential.

Over time, auxiliary radiators can become clogged, corroded, or develop cracks from road debris and aging plastic end tanks. These failures can cause coolant leaks, overheating, diminished AC efficiency, and potential engine damage. Replacing your worn or leaking auxiliary radiator restores full cooling efficiency and protects your vehicle from long-term thermal stress.

Built to meet OEM specifications, this unit installs cleanly with factory mounting points and fittings. Designed for durability under extreme temperature cycles, it ensures stable coolant temperatures during everyday driving and spirited performance.

Perfect for resolving coolant smell, low coolant warnings, or visible leaks around the front cooling module.

Key Features

• Direct OEM-style replacement for BMW Part No. 17117586544
• Restores proper cooling system performance and efficiency
• Fixes coolant leaks caused by cracked or clogged auxiliary radiators
• High-quality aluminum core with durable composite end tanks
• Maintains stable temperatures in high-demand driving conditions
• Plug-and-play installation with factory connectors and mounts
• Essential for preventing overheating and preserving engine longevity

FITMENT:

BMW X5 – E70 (2007–2013) including

• X5 3.0si
• X5 xDrive30i
• X5 xDrive35d
• X5 xDrive35i
• X5 xDrive48i
• X5 xDrive50i

BMW X5M – E70 (2010–2013) including

• X5 M (S63 engine)
  

Compatible with both RWD and xDrive variants.

*Some M models may use variant cooling components—VIN verification recommended.

Compatible with both RWD and xDrive variants.

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