Genuine 11 72 7 502 021 Secondary Air Injection Pump Filter - 11 72 7 502 021

The Genuine 11 72 7 502 021 Secondary Air Injection Pump Filter is an OEM replacement filter designed to protect the secondary air pump in BMW emission control systems. This filter prevents contaminants and debris from entering the secondary air injection pump, ensuring proper operation and longevity of the emissions system.

Key Features:

• Genuine BMW OEM part for guaranteed fit and performance
• Protects secondary air injection pump from dirt and debris
• Essential component for maintaining emissions compliance
• Direct replacement for worn or clogged original filter
• Helps prevent check engine light codes related to secondary air system

The secondary air injection system helps reduce emissions during cold starts by injecting fresh air into the exhaust stream. A clean, properly functioning filter is critical for maintaining optimal airflow and preventing damage to the expensive secondary air pump. Regular replacement of this filter can help avoid costly repairs and ensure your vehicle passes emissions testing.

OEM Part Numbers: 11727502021, 11 72 7 502 021, 7502021