{"product_id":"denso-oxygen-sensor-234-4012-narrow-band-4-wire-15-35-harness-direct-fit-oem-replacement","title":"Denso Oxygen Sensor 234-4012 Narrow-Band 4-Wire 15.35\" Harness — Direct-Fit OEM Replacement","description":"\u003cp\u003e\u003cstrong\u003eBuilt to OEM standards, the Denso 234-4012 is a direct-fit narrow-band oxygen (O2) sensor with a 4-wire, 15.35-inch harness designed to replace the original sensor in compatible late‑90s and early‑2000s vehicles.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis Denso replacement sensor restores the engine control module's ability to accurately monitor exhaust oxygen, helping the fuel system maintain the intended air-fuel ratio. Engineered and tested to the same tolerances as original equipment, the 234-4012 includes Denso's protective aluminum oxide trap layer and a refined zirconia sensing element to resist contamination and keep response times fast across its service life.\u003c\/p\u003e\n\n\u003ch3\u003eWhich vehicles will accept the 234-4012 sensor?\u003c\/h3\u003e\n\u003cp\u003eThe 234-4012 fits a broad selection of North American and a few international models from the mid-1990s through the early 2000s. Popular applications include many Chevrolet, GMC, Pontiac, Oldsmobile, Buick, Cadillac, Isuzu, Honda, Acura, Daewoo, and others — especially V6 and V8 platforms where a narrow-band upstream or downstream sensor was used.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCommon Chevrolet\/GMC fits: S10, Silverado, Tahoe, Suburban, Blazer, Corvette, Astro, Express vans.\u003c\/li\u003e\n  \u003cli\u003eBuick\/Cadillac\/Oldsmobile\/Pontiac: Century, LeSabre, Regal, Fleetwood, Bonneville, Firebird, Grand Am.\u003c\/li\u003e\n  \u003cli\u003eOther makes covered: Acura SLX, Honda Passport, Isuzu Rodeo\/Trooper, Daewoo Lanos\/Leganza.\u003c\/li\u003e\n  \u003cli\u003eSee vehicle list and model years to confirm exact compatibility before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does this Denso sensor protect against contaminants?\u003c\/h3\u003e\n\u003cp\u003eDenso applies an aluminum oxide trap layer to shield the ceramic sensing element from silicone and lead compounds that degrade performance. Combined with a PTFE filter and corrosion-resistant stainless steel housing, the sensor maintains accuracy longer under real-world conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAluminum oxide trap reduces silicone\/lead poisoning risk.\u003c\/li\u003e\n  \u003cli\u003ePTFE filter limits particulate and fluid intrusion.\u003c\/li\u003e\n  \u003cli\u003eStainless steel body helps prevent corrosion in exhaust environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat electrical and physical features should I know?\u003c\/h3\u003e\n\u003cp\u003eThis unit is a 4-wire narrow-band design with a 15.35-inch pre-attached wiring harness for plug-and-play replacement on compatible connectors. The internal zirconia element offers responsive voltage change across oxygen levels so the PCM can adjust injector timing and fuel trim as intended.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eConnector: 4-wire harness, 15.35 inches long for easy routing.\u003c\/li\u003e\n  \u003cli\u003eSensing element: refined zirconia for quick response.\u003c\/li\u003e\n  \u003cli\u003eDimensions: compact form factor (approx. 5.75 x 2.19 x 1.88 inches packed).\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this sensor fit in place of my original part numbers?\u003c\/h3\u003e\n\u003cp\u003eThe Denso 234-4012 is offered as a direct replacement for multiple OEM and aftermarket interchange numbers. If your vehicle’s original sensor matches one of the listed interchange references, this Denso unit is intended to deliver first-time fit and function.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eInterchange references include 19178930, 96335927, 19178918 and others.\u003c\/li\u003e\n  \u003cli\u003eDesigned for OE-style fitment and original connector compatibility.\u003c\/li\u003e\n  \u003cli\u003eBacked by Denso manufacturing and test standards for reliability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Denso 234-4012 is aimed at technicians and DIY owners who need a reliable, OE-quality narrow-band O2 sensor for late‑90s to early‑2000s GM, Buick, Pontiac, Oldsmobile, Cadillac, Isuzu, Honda\/Acura and select Daewoo vehicles. It’s suitable for anyone replacing a failing or contaminated sensor who wants an exact-fit replacement built to original tolerances and treated to resist contaminant damage.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is the Denso 234-4012 a direct replacement for OEM sensors?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The 234-4012 is built to OE standards and matches multiple interchange numbers for first-time fit on listed vehicles.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How long is the wiring harness on this sensor?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The unit includes a 4-wire harness that is 15.35 inches long for straightforward routing and connection.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Denso","offers":[{"title":"Default Title","offer_id":55168307691863,"sku":"B000C5UFJE","price":47.3,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/denso-234-4012-front-view.jpg?v=1790399335","url":"https:\/\/britishgarage.co.uk\/products\/denso-oxygen-sensor-234-4012-narrow-band-4-wire-15-35-harness-direct-fit-oem-replacement","provider":"British Garage","version":"1.0","type":"link"}