Kwiksen Heated Universal O2 Oxygen Sensor SG272T 21539 234-4018 for Buick LeSabre Cadillac Escalade CONTACT US via Amazon Messaging with any fitment issues or check this item description before you placing orders will help to purchase the correct product Guaranteed Direct Fit For Easy Installation and Great Performance at a Low Price Improved protection tube and increased thermal resistance prevents premature sensor failure and long warranty This is Brand New & High Quality Aftermarket Product service with Laser weld and Viton sealing system,Meet the professtional specification as OEM parts, for stable performance & durable US Based Company,You are buying directly from the MANUFACTUER!100% Satisfaction Guranteed! Service for 48 continental states, you will get them in 3-5 working days.