Oxygen sensor Lambda sensor Heated oxygen sensor for Volvo Upstream Oxygen O2 Sensor OE 31380995
Product Description:
O2 sensor
OE NO.: 31380995 9487147 30774651
Applicable vehicle type: For Volvo
An automotive oxygen sensor is an electronic sensor installed in the engine exhaust system to monitor the oxygen content in exhaust gases. Its English names are “Oxygen Sensor” or “Lambda Sensor.”
Based on operating principles and performance characteristics, automotive oxygen sensors are primarily categorized into the following types:
- Narrowband O₂ Sensor: Also known as the zirconia-type sensor, this is the most common variant. Its advantages include low cost and simple structure, but it features slower response times and provides feedback only near the stoichiometric ratio, unable to operate stably across a wide range of air-fuel ratios.
- Wideband Oxygen Sensor (Wideband O₂ Sensor): Also known as linear oxygen sensors or wide-range oxygen sensors, their core operates on electrochemical principles to measure air-fuel ratios. Wideband sensors continuously monitor oxygen levels across a broad air-fuel ratio range, with output voltage exhibiting a linear relationship to the air-fuel ratio.
- Titanium Dioxide (TiO₂) Sensor: Operates based on the principle that the resistance of titanium dioxide ceramic changes with oxygen concentration. At high temperatures, TiO₂ resistance increases as oxygen content rises and decreases as oxygen content falls. This sensor features a simple structure and low cost but exhibits slow response times and sensitivity to temperature variations. It is typically found only in early-generation vehicles and is now relatively uncommon.
- Heated Oxygen Sensor: Since oxygen sensors require high temperatures to function properly (typically demanding exhaust temperatures above 300°C), many modern sensors incorporate built-in heating elements (ceramic heaters). These rapidly heat the sensing element to operating temperature, enhancing response speed and detection accuracy during cold starts.
- Upstream and Downstream Oxygen Sensors: Vehicles equipped with multiple catalytic converters may feature several oxygen sensors. The upstream oxygen sensor (front sensor) is typically positioned before the three-way catalytic converter. It monitors exhaust composition entering the converter, providing feedback to the ECU to adjust fuel injection volume for closed-loop control. The downstream oxygen sensor (rear sensor) is located after the three-way catalytic converter and monitors the converter's efficiency.
These distinct oxygen sensor types serve specialized roles in automotive applications. Narrow-band sensors, favored for their low cost and proven technology, remain prevalent in most conventional vehicles. Broad-band sensors, however, are increasingly adopted in modern high-performance and fuel-efficient vehicles due to stricter emissions regulations and evolving engine technologies. Heated sensors enhance operational stability and response speed, becoming the standard design for modern oxygen sensors. The combination of upstream and downstream sensors is employed in some advanced vehicles for more precise emission control and fault diagnosis.
Company Profile:
Beijing Huarui Jietong Trading Co., Ltd. brings 20 years of automotive aftermarket expertise as a professional auto parts supplier. With strategic locations in Beijing, Guangzhou, and Jiangsu, we efficiently meet quality and quantity demands for global customers.
The company primarily focuses on accessories for Land Rover, Jaguar, and Volvo product series, including Air Conditioning Systems, Braking Systems, Driving Systems, Engine Systems, Cooling Systems, Auto Body Systems, Steering Systems, Suspension Systems, Transmission Systems, and other related parts. Facing the trend of economic globalization, our company is committed to bringing better products and services to the world, providing high-quality products and services for domestic and foreign enterprises and customers.
We welcome any inquiries and look forward to your contact.
Our Advantages
- 20 years of specialized auto parts industry experience
- Expert technical team for comprehensive support
- Direct partnerships with repair shops for real-world feedback
- Premium quality parts ensuring reliability and durability
- Extensive inventory with over 500,000+ items ready to ship
- Responsive customer service with quick turnaround
- Customized solutions for specific vehicle requirements
- Professional technical guidance and installation support
- Comprehensive 12-month warranty coverage
- Competitive pricing through optimized supply chains
- Rigorous quality control meeting industry standards
- Efficient global shipping via multiple carriers
Frequently Asked Questions
Shipping Information:
Items ship within 3-7 business days via Epacket/UPS/FEDEX/DHL/EMS.
Remote areas may incur additional shipping fees.
Inspect items upon delivery and contact us immediately for any damage.
Russian customers must provide full name; Brazilian customers must provide tax number for courier shipments.
Warranty & Support:
12-month warranty included with professional after-sales support for any product inquiries or issues.
Import Notes:
Import duties, taxes, and charges are not included in shipping costs and are the buyer's responsibility.
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