One year quality warranty. Please contact us first for a quicker and easier refund or replacement if you encounter any problems with the product during the warranty period. Product: Features stable performance; durable and long-lasting; tested before shipment; box packaging type; made of quality material; meets OEM standards and specifications; utilizes high-grade technology; easy to install and does not require special tools. Advantage: Improves fuel efficiency and power; reduces fuel consumption; prevents shaking; optimizes concentration; eliminates failure light codes; designed as direct replacements that do not necessitate calibration or programming. Installation Steps: 1. Utilize diagnostic codes to pinpoint the faulty sensor location and remove it using a socket; 2. Disconnect the wiring connector; 3. Lubricate the new sensor; 4. Reconnect the connector to clear the trouble codes. Compatible with Pontiac: Bonneville 3.8L 2004-2005 Upstream, Grand Am 2.2L 2002-2005 Upstream, Grand Prix 3.8L 2004-2008 Upstream, Sunfire 2.2L 2002-2005 Upstream Compatible with Saturn: Ion 2.0L 2004-2007 Upstream, Ion 2.2L 2003-2004 Upstream, L Sedan 2.2L 2002-2003 Upstream, Lw Wagon 2.2L 2002-2003 Upstream, Vue 2.2L 2002-2005 Upstream Compatible with Chevrolet: Impala 3.8L 2004-2005 Upstream, Malibu 2.2L 2004-2006 Upstream, Monte Carlo 3.8L 2004-2005 Upstream Compatible with Chevrolet: Astro 4.3L 1998-1999 Upstream and Downstream, Cavalier 2.2L 2002-2005 Upstream, Classic 2.2L 2004-2005 Upstream, Cobalt 2.0L 2005-2007 Upstream Compatible with Buick: Allure 3.8L 2005-2009 Upstream, Lacrosse 3.8L 2005-2009 Upstream, Lesabre 3.8L 2004-2005 Upstream, Lucerne 3.8L 2006-2008 Upstream, Park Avenue 3.8L 2004-2005 Upstream Part Number Fitment: 234-4646, 2344646,234 4646

Vehicle Fitment:

Position: Upstream

Compatible with Buick:
Allure 3.8L 2005-2009 Upstream
Lacrosse 3.8L 2005-2009 Upstream
Lesabre 3.8L 2004-2005 Upstream
Lucerne 3.8L 2006-2008 Upstream
Park Avenue 3.8L 2004-2005 Upstream

Compatible with Chevrolet chevy:
Astro 4.3L 1998-1999 Upstream and Downstream
Cavalier 2.2L 2002-2005 Upstream
Classic 2.2L 2004-2005 Upstream
Cobalt 2.0L 2005-2007 Upstream
Impala 3.8L 2004-2005 Upstream
Malibu 2.2L 2004-2006 Upstream
Monte Carlo 3.8L 2004-2005 Upstream

Compatible with Pontiac:
Bonneville 3.8L 2004-2005 Upstream
Grand Am 2.2L 2002-2005 Upstream
Grand Prix 3.8L 2004-2008 Upstream
Sunfire 2.2L 2002-2005 Upstream

Compatible with Saturn:
Ion 2.0L 2004-2007 Upstream
Ion 2.2L 2003-2004 Upstream
L Sedan 2.2L 2002-2003 Upstream
Lw Wagon 2.2L 2002-2003 Upstream
Vue 2.2L 2002-2005 Upstream