{"product_id":"ntk-27051-air-fuel-ratio-sensor-upstream","title":"NTK 27051 Air \/ Fuel Ratio Sensor - Upstream","description":"\u003ch2\u003eDirect-Fit Air\/Fuel Ratio Sensor\u003c\/h2\u003e\u003cp\u003eNTK 27051 is a specific-fit, heated air\/fuel ratio sensor built for upstream applications with OE-equivalent design. It uses a 5-wire configuration and is engineered for direct replacement where the original sensor matches this application.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eDirect-fit, specific application sensor for straightforward replacement.\u003c\/li\u003e\n\u003cli\u003eHeated design for faster sensor operation after startup.\u003c\/li\u003e\n\u003cli\u003e5-wire construction for the correct signal and heater circuit layout.\u003c\/li\u003e\n\u003cli\u003e18 mm thread diameter with 0.38 thread length.\u003c\/li\u003e\n\u003cli\u003e33.5 in. wiring harness length for proper routing.\u003c\/li\u003e\n\u003cli\u003eNTK 27051 is tested during manufacturing to meet or exceed OE specifications.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFitment Details\u003c\/h2\u003e\u003cp\u003eFits 2021 BMW M2, upstream. Fits 2019-2020 BMW M2, upstream, cylinders 1-3, bank 1 sensor 1. Fits 2020 BMW M4, upstream. Fits 2015-2019 BMW M4, upstream, cylinders 1-3, bank 1 sensor 1. Fits 2015-2018 BMW M3, upstream, cylinders 1-3, bank 1 sensor 1.\u003c\/p\u003e\u003cp\u003eThis part cross-references BMW 11787848482 for the same application.\u003c\/p\u003e\u003ch2\u003eWhat It Helps Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFault codes related to upstream air\/fuel ratio sensor performance.\u003c\/li\u003e\n\u003cli\u003eIncorrect fuel mixture readings from a worn sensor element.\u003c\/li\u003e\n\u003cli\u003eSlow sensor response during cold starts.\u003c\/li\u003e\n\u003cli\u003eSignal issues caused by damaged wiring or connector wear.\u003c\/li\u003e\n\u003cli\u003eOE-equivalent replacement needs for BMW M2, BMW M4, and BMW M3 applications.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\u003cp\u003eVerify connector style, thread size, and harness length before installation. This NTK 27051 sensor is a specific-fit part, so match the vehicle application and upstream location exactly. Mounting bracket is not included.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eNTK is part of the NGK family and is a major original equipment oxygen sensor supplier. The sensor is manufactured and tested to meet or exceed OE specifications for fit, form, and function.\u003c\/p\u003e","brand":"NTK","offers":[{"title":"Default Title","offer_id":53731447505077,"sku":"BFPZ-27051","price":157.66,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NO_27051_Fro.jpg?v=1794297226","url":"https:\/\/www.partcatalog.com\/products\/ntk-27051-air-fuel-ratio-sensor-upstream","provider":"PartCatalog","version":"1.0","type":"link"}