81.58 GBP
Bosch 0 281 004 191 Lambda/Oxygen Sensor
The Bosch Lambda sensor, model number 0281004191, is an oxygen O2 exhaust probe with five poles. It accurately measures air-fuel mixture to optimize engine performance and reduce emissions
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Bosch 0 281 004 191 Lambda/Oxygen Sensor is a high‑performance, OEM‑grade component designed to monitor exhaust gas composition and enable precise fuel management in modern internal combustion engines.
Key Functionalities
- Real‑time oxygen measurement: Continuously measures the ratio of oxygen to nitrogen in the exhaust stream, providing critical data for the engine control unit (ECU).
- Closed‑loop fuel control: Works with the ECU to adjust the air–fuel mixture, ensuring optimal combustion efficiency and reduced emissions.
- Pre‑catalyst placement: Located before the catalytic converter, it supplies accurate readings that help maintain the catalyst’s effectiveness.
Technical Specifications
| Parameter | Description |
|---|---|
| Model Number | 0 281 004 191 (also listed as 0281004191, LS44191, 03L906262Q) |
| Connector Type | 5‑pin vehicle‑specific connector for seamless integration with OEM wiring harnesses. |
| Operating Temperature Range | -40 °C to +120 °C (typical automotive range). |
| Response Time | Fast (< 200 ms) to support rapid engine load changes. |
| Material | High‑temperature ceramic sensor element with a stainless steel housing for durability. |
| Compatibility | Designed for Audi, Seat, Skoda, and Volkswagen models including the A3, A4, A5, A6, Q3, Q5, TT, Golf VII, Tiguan, Sharan, and others. |
| Installation Location | Front of the catalytic converter (pre‑cat). |
| Electrical Characteristics | Typical voltage drop 0.1 V to 0.9 V; current consumption < 10 mA. |
Installation & Maintenance
The sensor is engineered for straightforward installation:
- Removal: Disconnect the vehicle’s battery, detach the existing sensor from the exhaust pipe, and unscrew the mounting bracket.
- Installation: Align the 5‑pin connector with the ECU harness, secure the sensor with the provided clamp, and ensure a tight seal to prevent exhaust leaks.
- Tuning: After installation, perform an ECU reset or re‑learn procedure so that the engine control unit can calibrate to the new sensor’s characteristics.
Performance Benefits
- Improved Fuel Economy: Accurate oxygen readings allow the ECU to maintain stoichiometric combustion, reducing fuel consumption by up to 5 % in some models.
- Lower Emissions: By keeping the air‑fuel ratio optimal, the sensor helps keep CO, HC, and NOx levels within regulatory limits.
- Enhanced Engine Longevity: Precise fuel control reduces engine wear caused by lean or rich operating conditions.
Quality Assurance
The Bosch 0 281 004 191 sensor is manufactured under strict quality controls, meeting ISO/TS 16949 automotive standards. It undergoes rigorous testing for temperature stability, electrical integrity, and mechanical robustness before shipping.
Common Applications
- Audi A3/A4/A5/A6/Q3/Q5: Models from 2010 to present with 2.0 L TDI or gasoline engines.
- Seat Leon/Alhambra/Ottavia: 2.0 D and 1.8 T variants.
- Skoda Octavia/Tatiana: 2.0 D and 1.4 T models.
- Volkswagen Golf VII, Tiguan, Sharan, Passat CC: 2.0 L TDI engines.
Why Choose Bosch?
Bosch is a globally recognized leader in automotive electronics and sensor technology. The 0 281 004 191 Lambda/Oxygen Sensor reflects the brand’s commitment to reliability, precision, and environmental stewardship. Its proven track record across multiple vehicle families makes it a trusted choice for both OEMs and aftermarket installers.
Conclusion
The Bosch 0 281 004 191 Lambda/Oxygen Sensor delivers accurate, reliable, and efficient exhaust gas monitoring, essential for modern engine management systems. Its robust construction, vehicle‑specific connector, and compatibility with a wide range of Audi, Seat, Skoda, and Volkswagen models make it an indispensable component for maintaining optimal performance, fuel economy, and emissions compliance.
| This product in Comparor | |
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Category
This product is cataloged in our store in these categories
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- Exhaust Lambda sensor for cars |
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International
Find this product in one of our international stores
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 98.08 EUR  99.99 EUR  74.53 EUR  104.38 EUR  69.72 EUR |
| Colors
Predominant colors of the product |
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| Identifiers | |
| Brand |  Bosch is a brand of power tools and appliances. The company was founded in 1886 and produces a wide range of power tools, appliances, and accessories. Bosch tools are known for their quality and durability, and the company is a leader in innovation and design. |
| MPN | Bosch 0 281 004 191 |
| ID | 20741082 |
| Dimensions / Weight | |
| Key Features | |
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