GM GENUINE PARTS Heated Oxygen Sensor AFS106 (19355306) — OEM O2 Sensor, Heated, Direct-Fit

This GM Genuine Parts heated oxygen sensor is engineered and validated to the same standards used by General Motors for production and service parts. Installed in the exhaust stream, it senses the oxygen level in exhaust gases and provides feedback to the vehicle’s engine control module (ECM) so air/fuel mixtures can be adjusted toward the ideal stoichiometric ratio. That helps the powertrain manage emissions, combustion efficiency, and fuel use while maintaining proper system diagnostics.

How does the AFS106 sensor affect engine performance and emissions?

The oxygen sensor provides continuous feedback on exhaust composition so the ECM can trim fuel delivery. When the sensor reports accurate oxygen readings, the engine can operate closer to the manufacturer’s target air/fuel ratio for balanced combustion. This improves drivability and supports the vehicle’s emissions control systems.

• Heated sensing element reaches operating temperature faster for reliable early feedback
• Direct-fit connector and mounting match GM OE specifications
• Durable materials resist exhaust heat and contaminants for longer service life

What makes this a GM Genuine Parts (OE) sensor versus aftermarket options?

GM Genuine Parts are designed or validated by GM engineers to meet the same fit, form and function used on original vehicles. The AFS106 follows GM’s specifications for electrical characteristics, connector type, and mounting footprint, reducing the risk of installation issues or diagnostic faults that can arise with incompatible replacements.

• Engineered and tested to GM standards for compatibility and performance
• Previously appearing parts may have been listed under ACDelco GM Original Equipment
• Backed by GM part numbering and validation for Chevrolet, Buick, GMC, and Cadillac models

How do I know when the oxygen sensor needs replacing?

Symptoms of a failing oxygen sensor include reduced fuel economy, rough idle, persistent check-engine light codes related to O2 circuits, or failed emissions inspections. Because the sensor affects closed-loop fuel control, any inconsistent or slow response can trigger diagnostic trouble codes and noticeable drivability changes.

• Check-engine light with O2-sensor-related codes (P0130–P0167 ranges)
• Noticeable drop in highway or city fuel mileage
• Rough running, hesitation, or poor cold-start behavior

What should I consider for installation and compatibility?

The AFS106 is a direct-replacement heated oxygen sensor designed to match GM OE fitment. Always verify the GM part number and vehicle application before ordering; correct connector style, thread pitch, and sensor length are essential for a trouble-free fit. Replacement typically requires basic hand tools, an oxygen sensor socket, and proper torque to avoid exhaust leaks.

• Confirm fit with GM part number AFS106 (19355306) and vehicle application
• Use sensor socket and proper torque; avoid damaging threads or wiring harness
• Heated design requires compatible wiring and ECM circuits—match to original sensor type

Who this is for: The GM Genuine Parts AFS106 heated oxygen sensor is intended for owners, independent shops, and fleet technicians seeking an OEM-specified replacement for GM vehicles. It’s a suitable choice when you want a direct-fit part validated by GM engineers to preserve emissions performance, diagnostic accuracy, and expected drivability without the uncertainty of unknown aftermarket alternatives.