Delphi AF10523 Mass Air Flow Sensor

Delphi AF10523 Mass Air Flow Sensor

The Delphi AF10523 mass air flow sensor is a standard replacement for select BMW applications, including 2002-2003 BMW 745i and 745Li models. Built with Delphi’s OE heritage and supplier experience, it is made to restore accurate airflow measurement for proper engine management.

Key Features

• Mass air flow sensor complete assembly
• Standard replacement for emission control and engine air metering
• Black housing with oval female connector
• 5-terminal blade connection with clamp mounting
• Housing included for a direct-fit style replacement
• Package includes instruction sheet

Detailed Description

Delphi AF10523 is a mass air flow sensor designed for BMW 745i and BMW 745Li models from 2002 and 2003, with 2003 coverage limited to vehicles built through 09/2003. This sensor measures incoming air so the engine control system can calculate fuel delivery more accurately. The complete assembly design, black housing, and 5-terminal blade configuration support a straightforward replacement for the original unit.

Delphi draws on more than a century of OE experience and knowledge gained from supplying top automakers. That background is reflected in the AF10523 replacement sensor, which is built for the same application as cross-reference parts such as Bosch 0280218077 and Standard Ignition MAS0431. If you are searching for a BMW 745i mass air flow sensor or BMW 745Li MAF sensor, Delphi AF10523 is the direct part number to compare.

What It Helps Address

• Rough idle caused by inaccurate airflow readings
• Hesitation or sluggish throttle response
• Check engine light related to air metering faults
• Poor fuel control from a failing MAF sensor
• Driveability issues on BMW 745i and 745Li models

Installation Notes and Tips

Verify connector shape, terminal count, and mounting style before installation. This unit uses a female oval connector, 5 terminals, and clamp mounting, with no wiring harness included. Confirm vehicle build date for 2003 BMW 745i and 745Li applications, since coverage applies only through 09/2003.

Quality Assurance

Delphi builds aftermarket parts using OE-focused engineering and supplier knowledge developed through long-term work with major automakers. The AF10523 is a standard replacement mass air flow sensor intended to meet the needs of the listed BMW applications.