{"product_id":"denso-234-8059-oxygen-sensor-downstream","title":"Denso 234-8059 Oxygen Sensor - Downstream","description":"\u003ch2\u003eOE Style Oxygen Sensor\u003c\/h2\u003e\u003cp\u003eThis Denso oxygen sensor is a specific-fit, heated replacement built to OE standards for accurate exhaust monitoring. It is engineered for Mazda applications and uses a threaded mounting design with a 4-wire male connector for a direct-style installation.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eHeated oxygen sensor design for faster operating response.\u003c\/li\u003e\n\u003cli\u003eSpecific-fit construction for exact replacement applications.\u003c\/li\u003e\n\u003cli\u003eThreaded mounting type with a 0.709 thread diameter.\u003c\/li\u003e\n\u003cli\u003e11.77 wiring harness length for application-specific routing.\u003c\/li\u003e\n\u003cli\u003eExclusive aluminum oxide trap layer helps protect the ceramic element from silicone and lead contamination.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eDenso OE Style oxygen sensors are manufactured and tested to strict OE standards and built for first-time fit. This part number 234-8059 is a downstream oxygen sensor for 2017-2018 Mazda CX-5 and 2016-2018 Mazda CX-9, making it a direct replacement choice for drivers addressing sensor-related drivability or emissions concerns. The heated design supports quicker sensor operation, while the protective trap layer helps preserve the sensing element for consistent performance and longer service life. Part number 234-8059 is also cross-referenced to Mazda PY8W1886Z and NTK 24642 for the same application.\u003c\/p\u003e\u003ch2\u003eWhat It Is Used For\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eReplacing a worn or slow-responding downstream oxygen sensor.\u003c\/li\u003e\n\u003cli\u003eAddressing check engine lights tied to oxygen sensor faults.\u003c\/li\u003e\n\u003cli\u003eRestoring exhaust feedback for fuel control and emissions monitoring.\u003c\/li\u003e\n\u003cli\u003eCorrecting poor sensor readings caused by contamination or age.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eFits 2017-2018 Mazda CX-5, downstream. Fits 2016-2018 Mazda CX-9, downstream. Confirm connector style, thread size, and harness length before installation. Use the vehicle’s existing threaded mounting point and verify the downstream sensor location matches the application listed for part number 234-8059.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eDenso manufactures this sensor to strict OE standards and builds it as an exact replacement with first-time fit in mind. The OE Style line focuses on application-correct replacement parts that match the original design intent.\u003c\/p\u003e","brand":"Denso","offers":[{"title":"Default Title","offer_id":53487214919861,"sku":"BBNF-234-8059","price":93.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NP_2348059_Sid.jpg?v=1791351803","url":"https:\/\/www.partcatalog.com\/products\/denso-234-8059-oxygen-sensor-downstream","provider":"PartCatalog","version":"1.0","type":"link"}