Part Number: 25731293 (Interchanges with ACDelco 213-1697) Fitment: > * 2007-2009 Cadillac SRX 2005-2011 Cadillac STS Item Details: Condition: Genuine OEM Take-off. Function: This sensor monitors outside air quality and signals the HVAC system to auto-recirculate when pollutants or exhaust fumes are detected. Visual Condition: Plastic housing is solid. Electrical connector pins are clean, straight, and free of corrosion. Notes: Pulled from a 2007 SRX in Keller, TX. This is a common fix for Cadillac HVAC systems that throw an "Air Quality Sensor" error code or fail to switch to recirculation mode automatically. Buyer Note: This is located on the radiator support. Please note this is the Air Quality (Smog) Sensor, which is different from the smaller ambient temperature probe.
