GDUKOP HVAC Humidity Sensor 55111389AF — OE-Fit Replacement for Chrysler/Dodge/Jeep, Restores A/C & Defrost

This GDUKOP HVAC humidity sensor (55111389AF) is a direct OE-style replacement that restores proper cabin humidity detection and helps correct A/C and defrost behavior on compatible Chrysler, Dodge, Jeep, Ram, Fiat and Alfa Romeo models.

When your vehicle shows inconsistent climate control, improper defogging, or persistent P1009-related fault codes, a failing humidity sensor is often the cause. The GDUKOP 55111389AF is designed to match the original equipment fit and connector layout, making installation straightforward for many 2011–2023 models. It swaps in for several factory part numbers, so it’s a practical spare when troubleshooting HVAC issues or performing routine repairs.

Which vehicles will accept this humidity sensor?

The sensor covers a wide range of Chrysler, Dodge, Jeep, Ram, Fiat and Alfa Romeo vehicles across multiple model years. It is intended as a like-for-like replacement for the listed OEM part numbers so it can plug into the factory harness and mount where the original sensor sat.

• Chrysler: 2011–2023 300; 2017 200; 2017–2022 Pacifica; 2020–2022 Voyager
• Dodge: 2017–2023 Durango/Challenger; 2011–2023 Charger; 2017–2020 Journey; 2013–2016 Dart
• Jeep: 2016–2021 Grand Cherokee; 2014–2023 Cherokee; 2014–2021 Compass; 2015–2023 Renegade; 2022 Grand Cherokee WK
• Ram: 2014–2019 Ram 1500; 2019–2022 Ram 1500 Classic
• Fiat: 2012–2019 Fiat 500; 2014–2019 Fiat 500L; 2016–2019 Fiat 500X
• Alfa Romeo: 2018–2019 Stelvio

How does this part address HVAC faults or poor defrosting?

The vehicle’s climate system relies on accurate humidity readings to manage A/C compressor cycling, recirculation, and defrost logic. A degraded sensor can cause the HVAC controller to misjudge cabin moisture, leading to inconsistent cooling, extended fogging, or stored fault codes. Replacing the sensor returns correct humidity input so the control algorithms behave as intended.

• Resolves erratic A/C on/off cycling by providing stable humidity data
• Improves windshield defogging behavior through correct moisture detection
• Helps clear or prevent P1009-related fault codes when replaced
• Directly replaces multiple OEM part numbers for compatibility

Will installation be difficult and what should I check before buying?

Installation complexity varies by model and how the HVAC assembly is accessed. Many owners or technicians can replace the sensor without major dashboard disassembly, but some vehicles require partial dash removal. Before buying, confirm the OEM part number on your vehicle and verify that the connector and mounting style match your existing sensor.

• Confirm fit by comparing your OEM part number to listed replacements (e.g., 926369, 55111389AD/AF)
• Inspect the harness connector and sensor mounting points for visual match
• Have basic tools ready; some vehicles may need dash trim or glovebox removal
• Consider professional installation if access requires large dash disassembly

What does this sensor replace and what are the expected benefits?

The unit replaces several factory reference numbers and is built to OE dimensions so it seats in the original location and interfaces with the stock wiring. After replacement, owners typically notice more consistent climate control behavior and faster, reliable defog cycles when humidity detection was the issue.

• Replaces 926369, 55111389AF/AD/AC/AE/AB and related numbers
• OE-style fit reduces bracket or connector modification needs
• Targets common symptoms like erratic A/C, persistent fogging, and related codes

Who this is for: Drivers and technicians who own compatible Chrysler, Dodge, Jeep, Ram, Fiat or Alfa Romeo models manufactured between 2011 and 2023 and who are troubleshooting HVAC problems caused by faulty humidity sensing. It’s suited for DIY mechanics comfortable with interior trim removal and professional shops needing an affordable OE-match replacement part for climate control repairs.