Front & Rear Oxygen sensor OE 30757556 Heated oxygen sensor for Volvo O2 sensor
Product Description:
Oxygen sensor
OE NO.: 30757556 31293740
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.
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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