QFS Wideband O2 Oxygen Sensor for GM, AEM, Fast & Autometer

Key features

• Fitment & SKU: Compatible with GM vehicles (OE# 12575657, AC Delco 213-1572) and wideband controllers including AEM 30-2004, Autometer 2243, and FAST 170408. SKU: HFP-O2S-49.
• Industry-Standard Compatibility: Designed specifically as a direct replacement for the AEM 30-2004 sensor; compatible with the AEM 30-4110 (Digital Wideband), AEM 30-0300 (X-Series), and various Autometer, FAST, and Dynojet wideband controllers
• LSU 4.9 Architecture: Utilizes the advanced Bosch LSU 4.9 design, which does not require "free-air" calibration when used with compatible modern controllers, ensuring consistent accuracy throughout the life of the sensor
• Broad Cross-Reference: Replaces multiple high-performance and OEM part numbers including Autometer 2243, FAST 170408, AC Delco 213-1572, and GM 12575657
• *Critical Connector Note: This sensor features the ROUNDED electrical plug. It is a dedicated LSU 4.9 replacement and will NOT work with older controllers requiring the square-style LSU 4.2 connector

Free shipping included. 30-day hassle-free returns.