Ford Oxygen Sensor ZZC3-18-861 XR3Z-9G444-CA 234-4001/4046/4070 Multi-Number Fitment

Ford oxygen sensor, OEM numbers including 234-4070, 234-4071, 234-4127, 234-4401, 34-4127; fits Focus, Kuga, Mondeo with 2.0L/2.3L/3.0L engines. KLP brand uses high-temperature ceramic elements and corrosion-resistant stainless steel housing; durability tested beyond 100,000 km without noticeable degradation. It monitors exhaust oxygen content in real time and feeds ECU to adjust air-fuel ratio, ensuring combustion efficiency and emissions compliance. Installation requires attention to wiring connections.