--- product_id: 88365411 title: "Walker Products 350-34039 Oxygen Sensor 4-W Direct Fit Narrow-Band" brand: "walker products" price: "HK$11" currency: HKD in_stock: false url: https://www.desertcart.hk/products/88365411-walker-products-350-34039-oxygen-sensor-4-w-direct-fit store_origin: HK region: Hong Kong --- # 4-wire direct fit for precise ECU sync Optimizes air-fuel ratio for max fuel economy Platinum-coated electrodes resist wear & contamination Walker Products 350-34039 Oxygen Sensor 4-W Direct Fit Narrow-Band **Brand:** walker products **Price:** HK$11 **Availability:** ❌ Out of Stock ## Summary > 🛠️ Upgrade your ride’s brain with precision sensing power! ## Quick Answers - **What is this?** Walker Products 350-34039 Oxygen Sensor 4-W Direct Fit Narrow-Band by walker products - **How much does it cost?** HK$11 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/88365411-walker-products-350-34039-oxygen-sensor-4-w-direct-fit) ## Best For - walker products enthusiasts ## Why This Product - Trusted walker products brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Fuel-Savvy Performance:** Accurately measures oxygen levels to optimize fuel mixture, cutting costs and emissions. - • **Precision Engine Tuning:** Direct-fit 4-wire sensor ensures flawless ECU communication for peak combustion efficiency. - • **Trusted Legacy & Quality:** ISO9001/TS16949 certified with decades of industry leadership ensures reliability you can count on. - • **Plug-and-Play Installation:** OEM-grade fitment means quick, hassle-free replacement—get back on the road faster. - • **Durability Meets Innovation:** Specialized platinum coating protects sensor from erosion and exhaust contaminants, extending lifespan. ## Overview The Walker Products 350-34039 Oxygen Sensor is a premium OE replacement designed for direct 4-wire fitment, delivering precise oxygen level readings to optimize your engine’s air-fuel ratio. Featuring platinum-coated electrodes for enhanced durability and contamination resistance, it improves fuel economy and engine performance while reducing emissions. Backed by ISO-certified manufacturing and decades of expertise, this sensor offers reliable, long-lasting operation and easy installation for a seamless upgrade. ## Description Walker Products Engine Management and Oxygen/Air-Fuel sensors have been engineered and developed to be an Original Equipment Manufacturers replacement for many vehicles worldwide. Every part number is manufactured for the specific application, fitment position on the vehicle, and will provide the relevant diagnostic system feedback as required by the ECU. Newer vehicles will store fault codes in the ECU, some will relate to the affected sensor and its associated systems. A failed sensor might make itself known by causing the engine to run poorly, increase fuel consumption, exhaust emissions, or illuminating a (MIL) malfunction indicator light. The sensor, wiring harness, and connector should also be checked for physical damage. This will most likely also cause their operational life to be shortened. We are an Automotive ISO9001/TS 16949 certified company, with un-paralleled customer service, marketing, and shipping. Our electronic and paper catalogs are designed for today’s fast paced marketplace, along with our eye catching packaging. Since 1946, Walker Products has been the number one choice for the engine management sensors and fuel system components needed for your vehicle. ## Features - Package Contents: One (1) Unit - Walker Products 350-34039 Oxygen Sensor 4-W Direct Fit Narrow-Band; See desertcart Confirmed Fit to verify vehicle compatibility - Enhances Combustion Efficiency: Accurately determines oxygen content in exhaust gases to maintain the ideal air-fuel ratio for optimal engine performance - Improves Fuel Economy: Measures oxygen levels to optimize the air-fuel mixture, helping increase fuel efficiency and reduce operating costs - Delivers Reliable Sensing Performance: Features gas-permeable platinum-coated electrodes for precise, consistent, and long-lasting operation - Protects Against Contamination & Wear: Specialized coating helps prevent electrode erosion and contamination caused by combustion residue and exhaust particulates, extending sensor life ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01IAFTUDO | | Best Sellers Rank | #217,754 in Automotive ( See Top 100 in Automotive ) #730 in Automotive Replacement Oxygen Sensors | | Brand Name | Walker Products | | Customer Reviews | 4.3 4.3 out of 5 stars (594) | | Global Trade Identification Number | 00724620088636 | | Included Components | Oxygen Sensor | | Item Dimensions | 2.2 x 2 x 5.9 inches | | Item Highlight | Premium OE replacement sensor provides oxygen feedback to the engine control system for reliable performance and efficiency. | | Item Type Name | Oxygen Sensor | | Item Weight | 3.84 ounces | | Manufacturer | Walker Products | | Material Type | Ceramic, Metal | | Model | 350-34039 | | Mounting Type | Flange Mount | | Number of Items | 1 | | Number of Packs | 1 | | Output Type | Electrical Signal | | Part Number | 350-34039 | | Specific Uses For Product | Cold Start & Warm-Up Control, Engine Performance Optimization, Fuel Economy Improvement, Fuel–Air Ratio Monitoring, Oxygen Sensor | | Style Name | Oxygen Sensor | | UPC | 724620088636 | | Unit Count | 1 Count | | Warranty Description | 90 Day Warranty | ## Product Details - **Brand:** Walker Products - **Item Weight:** 3.84 ounces - **Item dimensions L x W x H:** 2.2 x 2 x 5.9 inches - **Material:** Ceramic, Metal - **Style:** Oxygen Sensor ## Images ![Walker Products 350-34039 Oxygen Sensor 4-W Direct Fit Narrow-Band - Image 1](https://m.media-amazon.com/images/I/51iuSO75VCL.jpg) ## Questions & Answers **Q: Does it fit in a Jeep liberty 2004 upstream and downstream?** A: I have this products istaled in my 2012 Jeep liberty but you need to purchase the right part for your car. **Q: Is this sensor also for downstream on driver side? 2017 Ram 1500** A: Hello: No, 350-34039 does not fit the Upstream and Downstream positions. 2017 Ram 1500 has 2 gasoline/flex engines that have O2 sensors 3.6L & 5.7L. The 3.6L takes 350-34213 in both Upstream and Downstream positions. The 5.7L takes either 350-34039 or 350-34213 in the Upstream position and either 350-34039, 350-34213, or 350-34592 in the Downstream positions depending on transmission type and 2WD or 4WD. Please feel free to call our Customer Service/Technical Assistance line at 866-245-5949. I hope that this helps - Good Luck. Keith Walker Product Engineer ASE Certified Master Technician Walker Products, Inc. **Q: Does this sensor fit 2009 dodge charger** A: It should fit. Double check your parts on auto sites if your unsure. **Q: Will this fit a 05 Dodge Durango hemi down stream passenger side?** A: It should dodge and Jeep o2 sensors are pretty much the same. Just make sure the connector is the same as yours. ## Frequently Bought Together - Walker Products 350-34039 Oxygen Sensor, Original Equipment Replacement O2 Sensor, - Walker Products 350-34213 Oxygen Sensor, Original Equipment Replacement Downstream heated O2 Sensor, Direct Fit - Offset Oxygen Sensor Socket, 3/8-Inch Drive, 7/8-Inch (22mm), Wire Gate Accesses Sensor from Side, Preventing Damage to Wires, Universal for Most Cars --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hk/products/88365411-walker-products-350-34039-oxygen-sensor-4-w-direct-fit](https://www.desertcart.hk/products/88365411-walker-products-350-34039-oxygen-sensor-4-w-direct-fit) --- *Product available on Desertcart Hong Kong* *Store origin: HK* *Last updated: 2026-09-28*