Ford Focus Mk3 Lambda Sensor Exhaust Probe CV619G444CB

Ford Focus Mk3 Lambda Sensor CV619G444CB is an original exhaust system component from the Lambda Sensors and O2 Sensors group, designed for precise monitoring of exhaust gas composition in Ford Focus third-generation vehicles. A used OEM part allows for maintaining factory engine operating parameters while optimizing service costs.

Specifications and technical data

• SKU: 1785292
• Mark: Ford
• Condition: Used
• OEM Part Number: 1785292
• Substitutable numbers: 1785292, CV61-9G444-CB, CV619G444CB
• Category: Oxygen Sensors

Technical Characteristics of the Ford Lambda Sensor

The lambda sensor in the exhaust system is responsible for the accurate measurement of oxygen content in exhaust gases, enabling the engine control unit to make real-time fuel injection adjustments. For the Ford Focus Mk3, using the correct O2 sensor is crucial for:

• stable engine operation across the full load range,
• maintaining the correct fuel-air mixture,
• efficient catalytic converter operation and reduced emissions,
• lower fuel consumption in both urban and non-urban conditions.

The original Ford lambda sensor is designed for the specific characteristics of the engine control unit, ensuring predictable responses to changes in load and exhaust gas temperature.

Benefits of Using an Original Ford Focus Mk3 Lambda Sensor

Using an OEM part from the Lambda Sensors and O2 Sensors category translates into a range of practical service and operational benefits:

• Factory Electrical Compatibility – correct signal parameters for the Ford engine control unit, without the need for adaptation.
• Appropriate Temperature Characteristics – predictable heating of the measuring element and stable operation under typical driving conditions.
• Consistency with Injection Maps – the sensor works with the ECU software designed for the Focus Mk3, facilitating diagnostics and calibration.
• Better Signal Quality Compared to Low-Cost Aftermarket Parts – reduction of "check engine" errors resulting from incorrect data interpretation.

Condition, Origin, and Practical Application

The offered Ford Lambda Sensor is a used part, removed from a vehicle. Such components are often chosen in professional workshops for:

• exhaust system repairs after failure or wear of the original sensor,
• resolving errors related to mixture correction and improper catalytic converter operation,
• optimizing service costs for vehicles used intensively in fleets or privately.

It is always advisable to confirm the correct sensor for a specific Focus Mk3 engine version based on the OEM number or catalog data, which minimizes the risk of installing an incorrect sensor.

How to Select and Safely Install Lambda Sensors and O2 Sensors

When replacing a lambda sensor in a Ford Focus Mk3, adhering to the correct installation procedure is key, including:

• checking compatibility with the vehicle's electrical system before installation,
• using the appropriate lambda sensor wrench to avoid damaging the threads in the manifold or exhaust pipe,
• checking the exhaust system for leaks after replacement,
• verifying operating parameters via OBD diagnostics (sensor voltage, fuel trims, response to load changes).

For users who wish to deepen their knowledge on selecting and operating used sensors, the Global Parts guide is useful: used automotive electronics – second-hand ECUs and sensors, which discusses, among other things, selection based on OEM numbers, compatibility issues, and practical installation examples.

Other Ford Lambda Sensors and O2 Sensors

If you are looking for other Lambda Sensors and O2 Sensors for Ford, check out the Ford Lambda Sensors and O2 Sensors available in our store to select a part that matches your vehicle's specific engine version and year.