Standard Motor Products 21027M BWD Mass Air Flow Sensor

The Standard Motor Products BWD 21027M is a 100% new, never remanufactured Mass Air Flow (MAF) Sensor. This precision engine management component measures the volume and mass of air entering the intake manifold and relays that data to the Engine Control Module (ECM), enabling accurate fuel delivery, optimal air/fuel ratio, and clean combustion.

Key Features:

• 100% new construction — never remanufactured, eliminating the risk of debris contamination from prior use
• Custom-designed platinum RTD sensing elements precisely match OE output signals for accurate airflow readings
• Manufactured and calibrated at an ISO/TS 16949- and ISO 14001-certified facility to strict OE specifications
• Hybrid electronic circuitry with no moving parts ensures a wear-free, long service life
• Sensing elements are insensitive to changes in supply voltage for consistent, reliable performance
• 4-terminal female connector with blade-style male terminals for direct OE-style fitment

Cross-Reference Part Numbers:

• BWD: 21027M
• Standard Motor Products (SMP): MF21027
• Bosch: 0280217105
• Spectra Premium: MA113
• Airtex: 5S2728
• Wells: SU4993
• Cardone Reman: 74-10050
• Cardone New: 86-10050
• Dorman: 917-854
• Beck/Arnley: 158-0698

This BWD mass air flow sensor is engineered to restore proper engine load calculations, fuel trim accuracy, EGR scheduling, and spark timing — delivering the reliable performance you expect from a trusted Standard Motor Products brand.