Kwiksen 2pcs Oxygen O2 Sensor 234-4065 234-4099 Upstream&Downstream For 1996-2000 Honda Civic 1.6L D16Y7 Engine Direct Plug-In Replacement Cross Reference Part Number: 234-4065, 234-4099, 234-4727, 234-4355 Position: 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.