Kwiksen Oxygen O2 Sensor Upper 234-4727 Upstream Replacement For Honda Civic Direct Plug-In Replacement Cross Reference Part Number: 234-4074, 234-4355, 234-4727, SG1847 Position: Upstream For Honda Civic, Please check compatibility in Description Warranty: One Year Unlimited Miles This is Brand New High Quality Aftermarket Product. Meet the professional specification as OEM parts, for stable performance durable service.