URO URO-000451 Engine Crankcase Breather Hose

The URO URO-000451 is a direct-fit replacement engine crankcase breather hose designed for BMW vehicles. This hose is a key component of the Positive Crankcase Ventilation (PCV) system, routing blow-by gases — combustion gases that escape past the pistons — back into the intake air stream to reduce unburned hydrocarbon emissions and maintain proper crankcase pressure.

Key Features:

• Direct OEM replacement designed to meet or exceed original BMW specifications
• High-quality materials engineered to resist cracking and splitting caused by engine heat and oil vapor exposure
• Restores proper crankcase ventilation and helps eliminate vacuum leaks that can trigger check engine lights
• Suitable for both professional shop use and DIY repair
• Manufactured by A.P.A. Industries, the maker of the URO Parts brand, from ISO 9000 certified facilities

URO Parts are produced by A.P.A. Industries, a leading aftermarket supplier focused on European vehicle applications. Their manufacturing facilities are ISO 9000 certified, and each hose is engineered and tested to match OEM flow rates, chemical resistance, and material composition. Replacing a worn or cracked crankcase breather hose helps restore engine efficiency, prevent oil leaks, and support proper emissions control.