GM Genuine Parts Flex Fuel Sensor 13507128 - Accurate Ethanol Readings

Our review of the GM Genuine Parts 13507128 Flex Fuel Sensor finds it best suited to owners of GM flex fuel vehicles who need a direct replacement for their factory component; the single biggest reason to buy is its OEM-level accuracy in reporting ethanol content so the engine control module can make the correct air/fuel and ignition adjustments. The reviewer found the sensor installs as a like-for-like unit, matches the original fit and connector, and sends precise ethanol content readings that restore proper fuel trim behavior and drivability in flex fuel applications.

Key Features

• Accurate ethanol sensing: Supplies precise ethanol content readings to the engine control module so fuel mixture and ignition timing are adjusted correctly for efficient operation.
• GM-recommended replacement: Designed as a direct replacement for the original factory component so fit and function are consistent with the vehicle's intended design.
• OE-quality construction: Manufactured to GM OE specification to provide the same durability and service life expected from original equipment.
• Reliable compatibility: Matches the original part's form and connector, making installation straightforward and minimizing modification or adapter needs.
• Engine performance benefit: Restores accurate sensor feedback, which can reduce drivability issues and help the ECM maintain proper air/fuel ratios under varying ethanol blends.

Who It's For

The sensor is ideal for drivers of GM flex fuel vehicles who need a like-for-like replacement after a failed or aging ethanol sensor, or for anyone experiencing fuel trim or drivability problems tied to ethanol content detection. Technicians and DIYers who prefer maintaining OE-spec components will appreciate the compatibility and predictable performance.

It is not targeted at non-flex-fuel vehicles or applications outside of the GM original equipment design; buyers who need a universal or aftermarket multi-platform sensor should look elsewhere. Likewise, those seeking a sensor with additional aftermarket features beyond OE functionality should consider other options.

Pros & Cons

Pros

• Genuine GM OE specification construction provides consistent fit and durability.
• Accurate ethanol readings restore proper ECM fuel and ignition adjustments.
• Direct replacement compatibility makes installation simple and reduces troubleshooting time.

Cons

• Limited to GM OE specification and flex fuel applications, so it is not a universal sensor for non-GM systems.

Specifications

Our Verdict

The GM Genuine Parts Flex Fuel Sensor 13507128 is a practical purchase for owners of GM flex fuel vehicles who want an OE-quality replacement that restores accurate ethanol sensing and reliable ECM performance. Its strong compatibility and factory-level construction make it good value for those who prioritize correct fit and long-term durability over aftermarket extras.

Frequently Asked Questions

Will this sensor fit my GM flex fuel vehicle?
It is manufactured as a GM-recommended replacement to match the original factory component, but buyers should verify vehicle compatibility before purchase.

What does the sensor do for engine performance?
The sensor reports ethanol content to the engine control module so the ECM can adjust air/fuel mixture and ignition timing for efficient operation.

Is this an OE-quality part?
Yes, it is manufactured to GM OE specification for fit, form, and function and offers the durability expected from original equipment.