Product Description:

Oxygen sensor
OE number: 31293740 30757556
Applicable vehicle type: For Volvo



The automotive oxygen sensor is a critical component within the engine management system, functioning as the engine's “olfactory organ”. By monitoring oxygen levels in the exhaust gases, it assists the vehicle in achieving efficient combustion and controlling emissions.


Typically, modern vehicles are equipped with two oxygen sensors:

• Front oxygen sensor (upstream): Mounted on the engine exhaust manifold before the three-way catalytic converter. Its primary function is to provide the ECU with air-fuel ratio feedback signals for regulating fuel injection volume.
• Rear oxygen sensor (downstream): Installed after the three-way catalytic converter. It primarily monitors the catalytic converter's operational status. By comparing signals from both upstream and downstream sensors, the ECU can determine whether the converter is functioning correctly.

Maintenance tips:

A preliminary fault diagnosis can be made by observing the colour of the sensor tip:
- Pale grey indicates normal operation
- White may indicate silicon contamination
- Brown may indicate lead contamination
- Black typically indicates carbon deposits

Use specified unleaded petrol to prevent sensor poisoning.

Monitor the engine warning light and schedule regular vehicle inspections.

Multiply Brands Auto Parts We Offer:

Why choice us:

1. Industry Experience: 20 years of experience in the auto parts industry, with in-depth market and product knowledge.

2. Professional Team: A team of experienced experts who can professionally answer all customer inquiries about auto parts.

3. Direct Partnerships: Direct partnerships with multiple auto repair shops, offering first-hand industry feedback and technical support.

4. High-Quality Products: Providing high-quality auto parts to ensure reliability and durability.

5. Comprehensive Inventory: A wide range of product lines and ample inventory to meet diverse customer needs.

6. Quick Response: Offering rapid response services to quickly address customer questions and needs.

7. Customized Services: Providing customized part solutions to meet specific vehicle or customer requirements.

8. Technical Support: Offering professional technical support and installation guidance.

9. After-Sales Service: A strong after-sales service network to ensure customers receive necessary support after product use,If you have any questions after receiving the goods, please contact us in time and we will provide the best solution.

10. Price Advantage:Competitive pricing due to long-standing supply chain relationships.

11. Quality Assurance:All products go through strict quality control processes to meet industry standards.

12. Fast Shipping: Over 500000+ in stock, we can ship them in a short time.

Company Profile:

Beijing Huarui Jietong Trading Co., Ltd. has been engaged in the automotive aftermarket for 20 years and is a professional supplier of auto parts. Located in the capital of China, Beijing, we have factories in Beijing, Guangzhou, and Jiangsu, which enable us to meet our customers' demands for quality and quantity in a timely and efficient manner.



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.







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