{"product_id":"denso-234-5139-air-fuel-ratio-sensor","title":"Denso 234-5139 Air \/ Fuel Ratio Sensor - Upstream or Upstream Left","description":"\u003ch2\u003eOverview of the Denso OE Style Air\/Fuel Ratio Sensor\u003c\/h2\u003e\u003cp\u003eThe Denso OE Style Air\/Fuel Ratio Sensor 234-5139 is engineered for precise emissions control in select BMW and Mercedes-Benz vehicles. Designed as a heated sensor with a specific fit, it ensures accurate air-fuel mixture readings to optimize engine performance and reduce emissions.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHeated sensor type for faster response times\u003c\/li\u003e\n\u003cli\u003eSpecific fitment for BMW and Mercedes-Benz models\u003c\/li\u003e\n\u003cli\u003e60.43-inch wiring harness length for proper installation\u003c\/li\u003e\n\u003cli\u003eFive-wire configuration with male connector\u003c\/li\u003e\n\u003cli\u003eThread diameter of 0.711 inches for secure mounting\u003c\/li\u003e\n\u003cli\u003eRegular grade type for reliable operation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eThis Denso Air\/Fuel Ratio Sensor, part number 234-5139, belongs to the OE Style product line, which focuses on delivering original equipment quality and fitment. The OE Style line is designed to meet or exceed factory specifications, providing a direct replacement that maintains the integrity of your vehicle's emissions system. This sensor features a heated element to ensure quicker activation and more consistent readings under various operating conditions.\u003c\/p\u003e\u003cp\u003eThe sensor’s 60.43-inch wiring harness length and five-wire setup with a male connector are tailored for specific BMW and Mercedes-Benz models, including popular vehicles such as the BMW 1 Series M, 128i, 135i, 3 Series variants (323i, 325i, 328i, 330i, 335i), 5 Series models (525i, 528i, 530i), and Mercedes-Benz models like the CLK63 AMG, E320, X3, X5, and Z4. The 0.711-inch thread diameter ensures a secure and proper fit in the exhaust system.\u003c\/p\u003e\u003ch2\u003eCommon Applications and Issues Addressed\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eHelps maintain optimal air\/fuel mixture for efficient combustion\u003c\/li\u003e\n\u003cli\u003eReduces emissions by providing accurate sensor data to the engine control unit\u003c\/li\u003e\n\u003cli\u003ePrevents engine performance issues related to faulty air\/fuel ratio readings\u003c\/li\u003e\n\u003cli\u003eResolves check engine light triggers related to sensor malfunction\u003c\/li\u003e\n\u003cli\u003eImproves fuel economy by ensuring proper sensor operation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEnsure compatibility with your specific BMW or Mercedes-Benz model before installation\u003c\/li\u003e\n\u003cli\u003eHandle the sensor carefully to avoid damage to the heated element and wiring harness\u003c\/li\u003e\n\u003cli\u003eUse appropriate tools to avoid damaging the 0.711-inch threaded fitting\u003c\/li\u003e\n\u003cli\u003eFollow vehicle manufacturer torque specifications when installing the sensor\u003c\/li\u003e\n\u003cli\u003eVerify connector polarity and secure connection to prevent electrical issues\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDenso’s OE Style Air\/Fuel Ratio Sensor 234-5139 is manufactured to meet original equipment standards, ensuring reliable performance and durability. While specific warranty details may vary, Denso products typically come with a limited warranty covering defects in materials and workmanship. This sensor is designed to provide consistent operation within the emissions control system of compatible BMW and Mercedes-Benz vehicles.\u003c\/p\u003e","brand":"Denso","offers":[{"title":"Default Title","offer_id":43978976002229,"sku":"BBNF-234-5139","price":124.36,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NP_2345139_Fro.jpg?v=1775007462","url":"https:\/\/www.partcatalog.com\/products\/denso-234-5139-air-fuel-ratio-sensor","provider":"PartCatalog","version":"1.0","type":"link"}