URO 17121712736 Expansion Tank Breather Hose 8x13mm

The URO 17121712736 is a direct-fit replacement expansion tank breather hose designed to restore proper coolant system venting on compatible BMW vehicles. This hose connects the coolant expansion tank to the breather pipe, allowing the cooling system to vent pressure and return coolant as engine temperatures fluctuate.

This hose is sold as an approximate 1-meter length with an 8mm inner diameter and 13mm outer diameter, and can be trimmed to the exact length required for your application. Over time, heat cycling and ozone exposure degrade the original rubber hose, leading to cracks, leaks, and loss of cooling system integrity — making periodic replacement an important part of preventative maintenance.

Key Features:

• Replaces OEM BMW part number 17121712736
• 8mm inner diameter x 13mm outer diameter construction
• Approximately 1 meter in length — trim to fit as needed
• 1 hose per vehicle required
• Cross-references: 17112160746, CHE0165R, W01331631496
• Designed to OE specifications for proper fit and sealing

URO Parts delivers quality aftermarket replacement components for European luxury vehicles, providing a cost-effective alternative to dealer-priced OEM parts without sacrificing fit or function.