{"product_id":"denso-oxygen-air-fuel-ratio-sensor-234-9005-for-2001-2005-honda-civic-2002-2004-cr-v-acura-rsx-oe-fit-fast-response","title":"Denso Oxygen\/Air-Fuel Ratio Sensor 234-9005 for 2001–2005 Honda Civic, 2002–2004 CR-V\/Acura RSX — OE-fit, Fast Response","description":"\u003cp\u003e\u003cstrong\u003eDenso 234-9005 is a direct-replacement air\/fuel ratio sensor engineered to restore accurate oxygen sensing and proper fuel trim for compatible 2001–2005 Honda and 2002–2004 Acura models.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eWhen an oxygen or air\/fuel ratio sensor begins to drift or fail it can cause rough idling, reduced fuel economy, and increased exhaust emissions. The Denso 234-9005 is built to the original-equipment standards to provide the correct electrical characteristics, mounting dimensions, and response speed for a first-time fit. This sensor is designed specifically for select Honda Civic, Honda CR-V, and Acura RSX model years, so replacement is straightforward and avoids the guesswork of cross-referencing incompatible parts.\u003c\/p\u003e\n\n\u003ch3\u003eWill this sensor fit my vehicle?\u003c\/h3\u003e\n\u003cp\u003eIf your vehicle is listed for this part number, the Denso 234-9005 is a direct fit without modification. It covers Honda Civic model years 2001–2005, Honda CR-V 2002–2004, and Acura RSX 2002–2004. Always confirm the original part number or VIN compatibility before purchase to ensure exact fitment.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAcura RSX: 2002–2004 direct replacement\u003c\/li\u003e\n  \u003cli\u003eHonda Civic: 2001–2005 direct replacement\u003c\/li\u003e\n  \u003cli\u003eHonda CR-V: 2002–2004 direct replacement\u003c\/li\u003e\n  \u003cli\u003eCheck OEM part numbers or vehicle VIN for confirmation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does this air\/fuel ratio sensor affect engine performance?\u003c\/h3\u003e\n\u003cp\u003eThe air\/fuel ratio sensor reports oxygen and fuel mixture information to the engine control unit (ECU), enabling precise fuel delivery and ignition timing adjustments. A correctly functioning sensor helps the ECU maintain efficient combustion across varying engine speeds and loads, which supports smoother operation and consistent throttle response.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eImproves fuel-trim accuracy across RPM range\u003c\/li\u003e\n  \u003cli\u003eSupports stable idle and quicker response to throttle changes\u003c\/li\u003e\n  \u003cli\u003eHelps maintain optimal catalytic converter function\u003c\/li\u003e\n  \u003cli\u003eReduces the risk of rich or lean running conditions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the build and quality features of the Denso 234-9005?\u003c\/h3\u003e\n\u003cp\u003eDenso manufactures its sensors to match OE specifications for electrical performance, housing dimensions, and connector type. The 234-9005 uses durable materials to withstand exhaust heat and contaminants, and Denso tests each unit for response time and output stability so you get a predictable replacement part.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOE-standard electrical characteristics for compatibility\u003c\/li\u003e\n  \u003cli\u003eDurable construction to resist exhaust exposure\u003c\/li\u003e\n  \u003cli\u003eTested for response speed and output reliability\u003c\/li\u003e\n  \u003cli\u003eEngineered for first-time fit and straightforward installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow easy is installation and what should I expect after replacement?\u003c\/h3\u003e\n\u003cp\u003eInstallation is typically straightforward for anyone comfortable working under the vehicle; most technicians remove the old sensor, screw in the new sensor, and reconnect the wiring harness. After replacement, the ECU may require a short drive cycle to relearn fuel trims; you should notice restored fuel economy and fewer emission-related symptoms once learning completes.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eThreaded sensor design for standard installation tools\u003c\/li\u003e\n  \u003cli\u003eReconnects to factory wiring harness—no splicing required\u003c\/li\u003e\n  \u003cli\u003eECU relearn\/driving cycle may be needed for optimal operation\u003c\/li\u003e\n  \u003cli\u003eExpect improved fuel trims and reduced emissions signals\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Denso 234-9005 is intended for owners and repair shops servicing 2001–2005 Honda Civics, 2002–2004 Honda CR-Vs, and 2002–2004 Acura RSXs that need a reliable, OE-quality air\/fuel ratio (oxygen) sensor. It’s a practical choice for DIY mechanics looking for a direct-fit replacement and for professionals who require a tested, consistent supplier part to restore proper engine management and emissions control.\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 234-9005 compatible with my Honda Civic?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes—this part fits Honda Civic model years 2001–2005, but verify your OEM part number or VIN to be certain.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will I need to reprogram the ECU after installing this sensor?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No reprogramming is usually required; the ECU will relearn fuel trims after a normal drive cycle.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Denso","offers":[{"title":"Default Title","offer_id":48080112287902,"sku":"B000C5UFVM","price":237.17,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/denso-234-9005-front-view.jpg?v=1785779013","url":"https:\/\/northtrailauto.ca\/products\/denso-oxygen-air-fuel-ratio-sensor-234-9005-for-2001-2005-honda-civic-2002-2004-cr-v-acura-rsx-oe-fit-fast-response","provider":"North Trail Auto","version":"1.0","type":"link"}