Downstream Air-Fuel Ratio O2 Sensor for Buick Envision

Main Description

The IWOKPHD Downstream Air-Fuel Ratio O2 Sensor for Buick Envision is a precise downstream sensor designed to monitor exhaust gas composition and support optimal engine performance. Featuring a heated design and a piezoelectric sensing element, this sensor delivers reliable downstream oxygen monitoring to help your vehicle maintain proper air–fuel ratio. It’s engineered as a direct replacement for Buick Envision models from 2021 to 2026 and offers broad cross-compatibility with several GM, Cadillac, Chevrolet, and GMC models, ensuring a dependable fit for multiple applications.

Part Number and OEM identification both point to 55488558, providing a straightforward replacement match for your OE part. Please take a moment to compare the part number and reference images to ensure you purchase the correct part for your vehicle. If you’re unsure which item fits your car, you can send the Part Number or original product photos to confirm before ordering. The only way to be 100% sure the part will fit your vehicle is to check your original part; we’ll verify for you and respond within 24 hours.

Benefits & Tips

• Restores accurate downstream air–fuel ratio monitoring, supporting proper engine performance and emissions control.
• Heated sensor design enables faster heat-up and stable readings during cold starts.
• Cross-compatibility with numerous Buick, Cadillac, Chevrolet, and GMC models helps simplify parts sourcing when servicing multiple vehicles.

Product Specifications

• Brand Name: IWOKPHD
• Part Number: 55488558
• OEM No.: 55488558
• Sensor Type: Piezoelectric
• Type: Heating
• Application:
  • BUICK ENVISION 2021-2026
  • CADILLAC CT4 2020-2026
  • CADILLAC CT5 2020-2026
  • CADILLAC CT6 2019
  • CADILLAC XT4 2019-2025
  • CADILLAC XT5 2020-2026
  • CADILLAC XT6 2021-2025
  • CHEVROLET BLAZER 2020-2026
  • CHEVROLET SILVERADO 1500 2019-2026
  • CHEVROLET SILVERADO 1500 LTD 2022
  • GMC ACADIA 2020-2023
  • GMC SIERRA 1500 2019-2026
  • GMC SIERRA 1500 LIMITED 2022
• Origin: Mainland China
• Notes: Please check the picture and the part number carefully to make sure that you bought the right part for your car. If you cannot determine which item fits your car, please send the Part Number or the Original product photos to us to confirm it before order. The only way to be 100% sure the part will fit your vehicle is to check your original part. We will check for you and reply soon within 24 hours.
• Warranty: 2 years | Warranty Type: Replacement

Package includes

• 1 pcs

Warnings / Reminders

• Please check the picture and the part number carefully to ensure you bought the right part for your car.
• If you cannot determine which item fits your car, please send the Part Number Or the Original product photos to us to confirm it before order.
• The only way to be 100% sure that the part will fit your vehicle is to check your original part. We will check for you and reply soon within 24 hours.

All electronic and mechanical equipment, devices and machines sold by InterCyprus to EU countries are CE certified and carry a two year warranty.

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