1. Product Overview
The NGK 1591 Lambda Sensor (also known as an Oxygen Sensor) is a critical component in your vehicle's exhaust system. It measures the oxygen content in the exhaust gases, providing essential data to the engine control unit (ECU) to optimize the air-fuel mixture. This ensures efficient combustion, reduces emissions, and maintains optimal engine performance.
This high-quality product from NGK is designed for reliability and precision, contributing to the longevity and efficiency of your vehicle's engine and catalytic converter.
- Quality Product: Manufactured to high standards for reliable performance.
- Number of Wires: 4 wires for comprehensive signal transmission.
- Length: 635 mm, suitable for specific vehicle applications.
2. Installation Guide
Installation of a lambda sensor requires specific tools and technical knowledge. It is highly recommended that this component be installed by a qualified automotive professional to ensure correct fitment, proper function, and to avoid damage to the sensor or vehicle.
General Installation Steps (for professional reference):
- Ensure the engine is cool before beginning work.
- Locate the existing lambda sensor in the exhaust system.
- Disconnect the electrical connector.
- Carefully remove the old sensor using an appropriate oxygen sensor socket or wrench.
- Apply anti-seize compound to the threads of the new NGK 1591 sensor (if not pre-applied).
- Thread the new sensor into the exhaust bung by hand to prevent cross-threading.
- Tighten the sensor to the manufacturer's specified torque using the correct tool.
- Reconnect the electrical connector, ensuring it clicks securely into place.
- Clear any diagnostic trouble codes (DTCs) from the vehicle's ECU using a scan tool.
- Start the engine and check for proper operation and absence of warning lights.
3. Operating Principle
The NGK 1591 Lambda Sensor continuously monitors the amount of oxygen in the exhaust gases after combustion. It generates a voltage signal that varies depending on the oxygen concentration. This signal is sent to the vehicle's ECU.
Based on this feedback, the ECU precisely adjusts the fuel injection and ignition timing to maintain an optimal air-fuel ratio (stoichiometric ratio). This process is crucial for maximizing fuel efficiency, minimizing harmful emissions, and ensuring the catalytic converter operates effectively.
4. Maintenance
Lambda sensors are wear-and-tear parts and do not typically require routine maintenance. However, their performance can degrade over time due to exposure to extreme temperatures, exhaust contaminants, and vibrations.
It is recommended to have your lambda sensor inspected during routine vehicle servicing. Replacement intervals vary by vehicle manufacturer and driving conditions, but generally, sensors may need replacement every 60,000 to 100,000 miles (approximately 96,000 to 160,000 kilometers) or as indicated by diagnostic trouble codes.
Always refer to your vehicle's service manual for specific maintenance schedules and recommendations.
5. Troubleshooting
A failing or faulty lambda sensor can lead to various issues affecting vehicle performance and emissions. Common symptoms include:
- Check Engine Light: The most common indicator, often accompanied by specific diagnostic trouble codes (DTCs) related to oxygen sensor performance (e.g., P0130, P0131, P0133).
- Increased Fuel Consumption: An inaccurate signal can cause the engine to run too rich or too lean, leading to poor fuel economy.
- Rough Idling or Stalling: Incorrect air-fuel mixture can affect engine stability.
- Failed Emissions Test: High levels of pollutants in the exhaust.
- Reduced Engine Performance: Hesitation, lack of power, or misfires.
If you experience any of these symptoms, it is advisable to have your vehicle diagnosed by a professional mechanic. A diagnostic scan tool can read the sensor's live data and retrieve any stored trouble codes to pinpoint the exact issue.
6. Specifications
| Attribute | Value |
|---|---|
| Brand | NGK |
| Model Number | 1591 |
| Number of Wires | 4 |
| Length | 635 mm |
| Item Weight | 105 g |
| Product Dimensions | 1.65 x 5.12 x 5.2 cm |
| Manufacturer Part Number | 1591 |
| OEM Part Number | 1591 |
| UPC | 087295115916 |
7. Vehicle Compatibility
The NGK 1591 Lambda Sensor is compatible with various vehicle models. Please verify compatibility with your specific vehicle using the part numbers and specifications provided.
Known Compatible Models (Example List):
- Honda Jazz II 1.4 (2001 - 2008) 61kW
- Honda Jazz II 1.2 (2001 - 2008) 57kW
- Honda Jazz III 1.4 i (2007 - ) 73kW
Corresponding Part Numbers (Cross-Reference):
- HONDA: 36531-PWE-E01, 36531-PWE-E010-M5, 36531-PWE-G01, 36531-PWE-E011-M5
- WALKER PRODUCTS: 250-24760
- LUCAS ENGINE DRIVE: LEB 455
- SMPE: 13228
- MEAT & DORIA: 816 30
- BOSCH: LS 6540, 0 258 006 540
- FEBI BILSTEIN: 31419
This list is not exhaustive. Always confirm fitment with your vehicle's specific make, model, and year before purchase and installation.
8. Warranty and Support
For information regarding the warranty of your NGK 1591 Lambda Sensor, please refer to the warranty documentation provided with your purchase or contact the retailer from whom you purchased the product. Warranty terms and conditions may vary.
For technical support or further inquiries about NGK products, please visit the official NGK website or contact their customer service department. You can also visit the NGK Store on Amazon for more information.
