99.99 EUR
Bosch 0258017270 - Lambda sensor with vehicle-specific connector
Recommended replace interval [km]: 250000 - Number of Poles: 5 - Overall Length [mm]: 600 - Exhaust System: in front of the catalyst - Lambda Sensor: Regulating Probe
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Bosch 0258017270 Lambda Sensor – Precision Oxygen Detection for Modern Engines
The Bosch 0258017270 is a high‑performance lambda sensor, also known as an oxygen sensor, designed to deliver accurate exhaust gas analysis in a wide range of gasoline and diesel engines. With its vehicle‑specific connector, this component seamlessly integrates into the engine control unit (ECU) architecture of many European models, ensuring optimal fuel efficiency, reduced emissions, and reliable engine performance.
Core Functionality
A lambda sensor measures the oxygen content** in exhaust gases**, providing real‑time data to the ECU. This information is crucial for:
- Closed‑loop fuel control: Adjusts the air‑fuel mixture to maintain stoichiometric balance.
- Emission monitoring: Detects excess or deficient oxygen levels, triggering catalytic converter checks.
- Engine diagnostics: Identifies sensor faults and engine misfires through voltage patterns.
Design & Construction
The Bosch 0258017270 features a robust ceramic substrate with platinum sensing elements. Its construction includes:
- High‑temperature tolerance**: Operates reliably up to 900 °C, ensuring longevity under harsh exhaust conditions.
- Low power consumption**: Draws minimal current, reducing parasitic load on the vehicle’s electrical system.
- Fast response time**: Achieves a 0.5‑second reaction to changes in oxygen concentration, essential for rapid fuel adjustments.
- Vehicle‑specific connector**: Tailored pin configuration matches the ECU’s input pins, eliminating adapter requirements and minimizing installation errors.
Compatibility Matrix
The sensor is engineered for a broad spectrum of models. Key vehicle families include:
- Audi TT 1.8 TFSI / 2.0 TFSI
- Volkswagen Passat (2008‑2012)
- Seat, Skoda, and Kia models** with similar engine architectures.
- Hyundai and other OEMs** that share the same exhaust manifold layout.
Engine types span both gasoline and diesel variants, provided the ECU expects a 5‑pole lambda sensor input. Always verify the vehicle’s service manual for exact pinout compatibility before installation.
Installation Guidelines
- Safety first**: Disconnect the battery to prevent electrical shock or unintended ECU activation.
- Locate the sensor**: Typically positioned near the exhaust manifold, upstream of the catalytic converter.
- Remove the old sensor**: Use a suitable socket and gentle torque to avoid damaging the connector.
- Install the Bosch 0258017270**: Align the vehicle‑specific pins with the ECU input. Secure with the provided retaining clip or torque specification.
- Reconnect the battery** and start the engine. Observe the sensor’s voltage curve on a diagnostic scan tool to confirm proper operation.
Performance Benefits
- Enhanced fuel economy**: Precise oxygen readings enable leaner combustion, reducing fuel consumption by up to 2% in some models.
- Lower emissions**: Accurate sensor data keeps the catalytic converter within optimal operating temperatures, cutting NOx and CO outputs.
- Improved engine longevity**: By preventing rich or lean conditions, the sensor protects pistons, valves, and injectors from wear.
- Diagnostic clarity**: The sensor’s voltage signature is a reliable indicator for ECU fault codes (e.g., P0171/P0174), simplifying troubleshooting.
Troubleshooting Common Issues
| Symptom | Possible Cause | Recommended Action |
|---|---|---|
| No voltage output | Faulty connector or damaged sensor | Inspect wiring, replace sensor if necessary |
| Erratic voltage spikes | Electrical interference or ECU fault | Check grounding, scan for related codes |
| High operating temperature | Excessive exhaust backpressure | Verify exhaust system integrity |
Maintenance & Longevity Tips
- Regular diagnostic scans**: Perform ECU checks every 10,000 miles to catch sensor drift early.
- Keep the sensor clean**: Avoid excessive soot buildup by ensuring proper combustion and using high‑quality fuel.
- Avoid physical shocks**: The ceramic element is fragile; handle with care during removal or replacement.
Conclusion
The Bosch 0258017270 lambda sensor exemplifies engineering precision, offering reliable oxygen measurement across a diverse array of modern vehicles. Its vehicle‑specific connector eliminates installation headaches, while its robust design ensures consistent performance under demanding operating conditions. Whether you’re restoring a classic Audi TT or maintaining a contemporary Volkswagen Passat, this sensor delivers the accuracy and durability required for optimal engine management.
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 138.56 EUR  118.99 EUR  94.62 EUR  127.89 EUR |
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| 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 0 258 017 270 |
| ID | 20740216 |
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