It is designed to replace cracked, warped, or missing covers on Bosch flap-style airflow sensors, restoring a proper seal and clean appearance. ✅Replaces Bosch Part #: 0 280 203 . Bosch: 0 280 203 023, 0 280 203 025, 0 280 203 026, 0 280 203 035, 0 280 203 004, 0 280 203 011.