Getting a check engine light for your oxygen sensors? This A-Premium 4-piece set includes both the upstream and downstream sensors for your 2006-2010 Kia Optima (2.7L V6), 2007-2010 Kia Rondo (2.7L V6), and 2007-2009 Hyundai Santa Fe (2.7L V6). It replaces OEM numbers like 3921037190 and 3921037510.
These are brand new, heated sensors with 4-wire connectors and a threaded mount. They're built from premium materials to meet or exceed the original specs for performance and reliability. Installation is usually straightforward with basic tools. A-Premium backs them with a one-year unlimited-mileage warranty. A complete, cost-effective solution to restore your engine's fuel efficiency and performance.
