{"product_id":"new-downstream-lambda-probe-oxygen-sensor-for-ford-focus-2-3-c-max-0258006569-0-258-006-569-3m51-9g444-aa-1346367-volvo-30650780","title":"Downstream Oxygen Sensor Lambda Probe 4-Wire for Ford Focus 2\/3 C-Max, Heated Replacement","description":"\u003cdiv\u003e\n\u003cp\u003eUpgrade your Ford Focus 2\/3 or C-Max with a reliable downstream oxygen sensor (lambda probe) designed for precise exhaust gas monitoring. This 4‑wire, heated sensor from WEIDA AUTO PARTS is built to plug directly into your vehicle’s exhaust system, providing accurate oxygen readings after the catalytic converter. With its exact fit and OEM compatibility, it helps maintain optimal fuel trim, reduce emissions, and support smooth engine performance even as your vehicle ages.\u003c\/p\u003e \u003cp\u003eDesigned as a factory-style replacement, this downstream sensor complements the upstream sensor to deliver balanced monitoring of the exhaust system. Its piezoelectric technology ensures fast response times to changing gas compositions, helping the engine control unit adjust air-fuel mixture efficiently. The 4‑wire heated design enables faster heating of the sensor to operating temperature, which means reliable readings from cold starts and in a variety of driving conditions. OEM Number 3M51-9G444-AA ensures compatibility with Ford Focus 2\/3 and C‑Max models, while origin manufacturing in Mainland China supports cost-effective, high-quality parts for maintenance and repair projects.\u003c\/p\u003e \u003ch2\u003eBenefits \u0026amp; Tips\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eImprove fuel efficiency and reduce emissions by maintaining accurate after-catalytic-converter oxygen sensing, supporting proper engine management.\u003c\/li\u003e\n\u003cli\u003eSupport reliable diagnostics and quicker resolution of check engine light related to downstream oxygen sensing by providing stable, trustworthy readings.\u003c\/li\u003e\n\u003cli\u003eTip: When replacing, verify the OEM part number 3M51-9G444-AA matches your vehicle and follow proper installation procedures, including disconnecting the battery and respecting torque specifications for threaded connections.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eProduct specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e WEIDA AUTO PARTS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e Downstream Oxygen Sensor \/ Lambda Probe\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVehicle compatibility:\u003c\/strong\u003e Ford Focus 2\/3 and C-Max\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSensor type:\u003c\/strong\u003e Piezoelectric\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeating:\u003c\/strong\u003e Heated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection:\u003c\/strong\u003e 4-Wire\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM No.:\u003c\/strong\u003e 3M51-9G444-AA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Mainland China\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasuring range:\u003c\/strong\u003e for Ford Focus 2\/3 C-Max downstream installation\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003ePackage includes:\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1 x Downstream Oxygen Sensor Lambda Probe (4-Wire)\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eWarnings \/ Reminders\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eEnsure correct fitment by matching the OEM part number 3M51-9G444-AA to your vehicle.\u003c\/li\u003e\n\u003cli\u003eDisconnect the battery and follow vehicle repair guidelines during installation to avoid electrical shock or damage.\u003c\/li\u003e\n\u003cli\u003eIf diagnostic trouble codes persist after replacement, inspect catalytic converter efficiency and upstream oxygen sensors as part of the full system check.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eAll electronic and mechanical equipment, devices and machines sold by InterCyprus to EU countries are CE certified and carry a two year warranty.\u003c\/p\u003e \u003cp\u003eSince 2002, intercyprus.com has been a trusted source for reliable automotive parts.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"InterCyprus Trading Ltd","offers":[{"title":"Default Title","offer_id":52391925449046,"sku":"32905203398-Default Title","price":35.18,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0530\/0604\/1274\/files\/H0c64b00f754f4c2491cb69c43ba33ce3R.webp?v=1768928294","url":"https:\/\/www.intercyprus.com\/fr\/products\/new-downstream-lambda-probe-oxygen-sensor-for-ford-focus-2-3-c-max-0258006569-0-258-006-569-3m51-9g444-aa-1346367-volvo-30650780","provider":"InterCyprus Trading Ltd","version":"1.0","type":"link"}