{"product_id":"sdyyds-o2-sensor-kit-for-2006-2015-honda-civic-1-8l-l4-2pcs-upstream-downstream-direct-fit","title":"SDYYDS O2 Sensor Kit for 2006–2015 Honda Civic 1.8L L4 — 2PCS Upstream \u0026 Downstream Direct Fit","description":"\u003cstrong\u003eSDYYDS two-piece oxygen sensor kit replaces both upstream and downstream O2 sensors for 2006–2015 Honda Civic 1.8L L4, restoring accurate air-fuel monitoring and emissions control.\u003c\/strong\u003e\n\n\u003cp\u003eIf your Civic is showing a check engine light, rough idle, or reduced fuel economy, worn oxygen sensors are a common cause. This SDYYDS kit contains both the upstream (pre-catalytic) and downstream (post-catalytic) O2 sensors—part numbers 234-9124 and 234-4350—engineered for direct replacement on 2006–2015 Honda Civic models with the 1.8L L4 engine. Designed as plug-and-play units, they aim to match or exceed original equipment performance while simplifying installation and minimizing downtime.\u003c\/p\u003e\n\n\u003ch3\u003eHow do these sensors affect my Civic’s performance?\u003c\/h3\u003e\n\u003cp\u003eOxygen sensors measure exhaust oxygen levels so the engine control unit (ECU) can adjust fuel delivery. Faulty sensors can lead to inaccurate fuel trim, higher emissions, and degraded throttle response.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eUpstream sensor (234-9124) monitors exhaust before the catalytic converter for real-time air-fuel corrections.\u003c\/li\u003e\n  \u003cli\u003eDownstream sensor (234-4350) verifies catalytic converter efficiency after the catalyst.\u003c\/li\u003e\n  \u003cli\u003eReplacing both sensors at once helps the ECU relearn accurate fuel maps faster.\u003c\/li\u003e\n  \u003cli\u003eProperly functioning O2 sensors support more stable idle and improved fuel economy.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs installation difficult for a DIY mechanic?\u003c\/h3\u003e\n\u003cp\u003eInstallation is intended to be straightforward: the SDYYDS sensors use a plug-and-play connector and standard thread sizes to match OEM mounting points. Basic hand tools and an O2 sensor socket are usually all that’s needed.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDirect-fit connectors eliminate splicing or wiring modifications.\u003c\/li\u003e\n  \u003cli\u003eThreaded housings match factory mounting locations for a secure fit.\u003c\/li\u003e\n  \u003cli\u003eTypical install time: 30–90 minutes depending on access and tools.\u003c\/li\u003e\n  \u003cli\u003eFollow torque specs and anti-seize guidance to avoid damage during installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat warranty and customer support come with this kit?\u003c\/h3\u003e\n\u003cp\u003eSDYYDS backs the kit with a one-year warranty and responsive customer service to resolve fitment or functionality questions. Support is available if you encounter issues during installation or the initial operation period.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e1-year limited warranty covering manufacturing defects.\u003c\/li\u003e\n  \u003cli\u003eCustomer service response within 24 hours for troubleshooting and guidance.\u003c\/li\u003e\n  \u003cli\u003eIf a part is defective, SDYYDS provides replacement steps per warranty terms.\u003c\/li\u003e\n  \u003cli\u003eDocumentation and part numbers included for easy reference: 234-9124 (upstream), 234-4350 (downstream).\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich vehicles and part numbers does this kit fit?\u003c\/h3\u003e\n\u003cp\u003eThis pair is made specifically for Honda Civic 1.8L L4 engines built between 2006 and 2015. Confirm fitment by matching your vehicle’s engine code and existing O2 sensor part numbers before ordering.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFitment: Honda Civic 2006–2015, 1.8L L4 engine models.\u003c\/li\u003e\n  \u003cli\u003eInterchange numbers: 234-9124 (upstream) and 234-4350 (downstream).\u003c\/li\u003e\n  \u003cli\u003eIntended as direct replacements for the factory sensors—no modifications expected.\u003c\/li\u003e\n  \u003cli\u003eCheck your vehicle’s VIN or service manual to verify compatibility.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? This SDYYDS dual oxygen sensor kit is suited for Honda Civic owners and DIY mechanics who need a reliable, cost-effective replacement for aging O2 sensors on 2006–2015 1.8L L4 Civics. It’s also appropriate for service shops replacing both upstream and downstream sensors to restore accurate emissions readings and fuel control without wiring changes. If you want a plug-and-play solution with factory-style fit and one-year backing, this pair provides a practical option.\u003c\/p\u003e\n\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will these sensors fit my 2012 Honda Civic 1.8L?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. This SDYYDS kit covers 2006–2015 Honda Civic models with the 1.8L L4 engine, including 2012. Confirm by matching part numbers or VIN if unsure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do I need to program the ECU after installation?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No programming is typically required; the ECU relearns from the new sensors during normal driving cycles.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"SDYYDS","offers":[{"title":"Default Title","offer_id":67586634449081,"sku":"B0D8VN5V71","price":121.37,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/sdyyds-upstream-downstream-kit-front-packaging.jpg?v=1790488772","url":"https:\/\/redleafauto.ca\/products\/sdyyds-o2-sensor-kit-for-2006-2015-honda-civic-1-8l-l4-2pcs-upstream-downstream-direct-fit","provider":"Redleaf Auto","version":"1.0","type":"link"}