Air Fuel Ratio O2 Sensor for Buick Lacrosse EG2 CW2
The Air Fuel Ratio O2 Sensor for Buick Lacrosse EG2 CW2 is a purpose-built, heated oxygen sensor designed to deliver fast, accurate exhaust gas readings that help your engine run cleaner and more efficiently. Built to OEM standards, this sensor captures real-time oxygen levels and feeds precise data to your engine control unit, enabling a lean or rich mixture as needed to optimize performance, fuel economy, and emissions. With compatible part numbers 12621696, ES11088-11B1, and ES1108811B1, it’s a reliable replacement that fits Buick Lacrosse models (EG2 and CW2) and other listed Buick configurations. Its heating element ensures quick reach to operating temperature, reducing cold-start roughness and improving catalyst efficiency from the moment you start the engine.
Key benefits include improved idle stability, smoother acceleration, and better fuel efficiency because the ECU receives accurate, timely oxygen readings. The sensor’s piezoelectric technology provides stable signal output across a wide range of engine conditions, while the heated design helps maintain optimal performance even in cooler climates. Note that compatibility relies on matching the OEM part numbers and vehicle model; always verify against the original part to ensure a perfect fit.
Benefits & Tips
- Enhance fuel economy by providing precise air-fuel ratio data to the ECU, reducing unnecessary fuel use during cruising and acceleration.
- Support cleaner emissions and quicker catalyst light-off thanks to fast heating and accurate downstream sensing, especially after cold starts.
- Use the OEM numbers (12621696, ES11088-11B1, ES1108811B1) as a quick compatibility check when replacing on Buick Lacrosse EG2/CW2 and related models.
Product specifications
- Part Numbers: 12621696, ES11088-11B1, ES1108811B1
- Sensor Type: Piezoelectric
- Heating Type: Heated/with heating element
- Measuring Range: Meant for Buick Lacrosse EG2 and Lacrosse CW2 models
- Application/Fitment: For Buick GL8 S (CU3) 2011-2020; Buick GL8 (CU2) 2005-2016; Buick Regal (EG1) 2008-2017; Buick Lacrosse (EG2) 2009-2016; Buick Lacrosse (CW2) 2008-2009
- Origin: Mainland China
Package includes:
- 1 x Air Fuel Ratio O2 Sensor for Buick Lacrosse EG2 CW2
Warnings/Reminders
Please review the pictures and confirm the part number to ensure the correct fit for your vehicle. If you’re unsure which item fits your car, please provide the Part Number or the original product photos for confirmation before ordering. The only way to be 100% sure is to check your original part; we will verify and respond 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.
At intercyprus.com since 2002 — trusted for quality and reliability.