Delphi AF10123 Mass Air Flow Sensor

Delphi AF10123 Mass Air Flow Sensor

The Delphi AF10123 is a premium mass air flow sensor probe for probe-only applications that use a 3-pin, female oval connector and bolt-on mounting. Built from Delphi’s OE heritage and decades of supplier experience, it is a direct-fit emission control sensor for select Buick, Oldsmobile, Chevrolet, and Pontiac vehicles.

Fits 1990-1996 Buick Regal, Fits 1991-1995 Buick Park Avenue, and Fits 1992-1995 Pontiac Bonneville, with additional coverage for other probe-only Mass Air Flow Sensor applications in the same platform family.

Key Features

• Delphi AF10123 mass air flow sensor probe only
• Black and silver housing finish
• 3-terminal design with pin terminals
• 1 female oval connector
• Bolt-on mounting type for direct replacement use
• Premium item grade for emission control service
• Housing included: No
• Wiring harness included: No
• Package contents: Mass Air Flow Sensor - Probe Only, Instruction Sheet

Detailed Description

The Delphi AF10123 is engineered for vehicles that use a probe-only mass air flow sensor configuration. As an emission control sensor, it measures incoming air volume so the engine control system can maintain proper fuel delivery, idle quality, and drivability. Delphi builds this part using OE experience gained from supplying major automakers, bringing factory-level design knowledge to the aftermarket replacement.

This part cross-references Standard Ignition MAS0187 and Dorman - HELP 59003 for the same application. It also serves as a replacement option for select Buick LeSabre, Buick Park Avenue, Buick Riviera, Oldsmobile 88, Oldsmobile 98, Oldsmobile Cutlass Ciera, Pontiac Bonneville, and related probe-only applications. The Delphi AF10123 is a practical choice when the original sensor probe has failed but the vehicle uses the existing housing and connector layout.

What It Helps Fix

• Rough idle caused by inaccurate airflow readings
• Hesitation or stumble during acceleration
• Hard starting related to incorrect air-fuel calculation
• Check engine light conditions tied to mass air flow sensor faults
• Poor fuel control from a worn or contaminated sensor probe

Installation Notes

Verify that your vehicle uses a probe-only mass air flow sensor before ordering. This Delphi AF10123 uses a 3-pin female oval connector and bolt-on mounting, and it does not include a housing or wiring harness. Compare the connector shape, terminal count, and original sensor style against the removed part before installation. For best results, inspect the intake tract for leaks or contamination that could affect airflow readings after replacement.

Quality Assurance

Delphi applies OE heritage and supplier knowledge to this aftermarket sensor, with design and manufacturing practices informed by its long history supporting major automakers. The AF10123 is a premium-grade replacement built for direct emission control service on the listed applications.