Genuine BMW Air Injection Hose

The Genuine BMW Air Injection Hose (also called a secondary air injection hose, air pump hose or catalytic converter air tube) is an original equipment part. It is a line in the secondary air injection system, which carries fresh air toward the exhaust side of the engine.

Key Features:

• Genuine BMW part: Built to BMW's original equipment specifications for fit and function.
• Emissions system component: Secondary air injection adds fresh air to the exhaust stream during cold starts. This helps the catalytic converter reach operating temperature faster and reduces emissions.
• Dedicated routing: Designed to connect the air injection system components as the factory intended.
• OEM quality: Made for durability under underhood heat and vibration.

Replacing a cracked, brittle or leaking air injection hose with a genuine BMW part helps the secondary air system keep working as designed. It also helps avoid emissions-related fault codes. Select the specific BMW part number you need from the variants listed on this page.