Ford Focus Mk3 Exhaust Lambda Oxygen Sensor 1.6 TDCI Diesel Engine AV2Q-9D375-AA

Ford Focus Mk3 Exhaust Lambda Oxygen Sensor 1.6 TDCI Diesel is an original component from the Lambda sensors and O2 sensors group, designed for Ford diesel engines. This used OEM part allows for the restoration of proper exhaust gas composition monitoring and stable engine operation in 1.6 TDCI versions, ensuring correct compatibility with the factory engine control unit.

Specifications and technical data

• SKU: 1697560
• Mark: Ford
• Condition: Used
• OEM Part Number: 1697560
• Substitutable numbers: 1697560, AV2Q-9D375-AA, AV2Q9D375AA
• Fuel type: Diesel
• Category: Oxygen Sensors

Purpose and function of the lambda sensor in the Ford Focus Mk3

The presented lambda sensor is a component of the exhaust emission control system in the Ford Focus Mk3 with a 1.6 TDCI diesel engine. It is responsible for the precise measurement of oxygen content in the exhaust gases, which allows the engine control unit to perform real-time fuel dose corrections. As a result, the injection system maintains stable operating parameters, and the engine retains proper performance and predictable throttle response. In diesel engines, a properly functioning lambda sensor has a significant impact on:

• maintaining an optimal air-fuel mixture under various load conditions,
• efficient operation of the exhaust gas treatment system,
• reducing smoke and excessive emissions of nitrogen oxides and particulate matter,
• idle speed stability and smoothness of acceleration.

Benefits of using an original diesel lambda sensor

Using an original lambda sensor in a 1.6 TDCI engine allows for the preservation of the engine's factory operating parameters. The component is designed to work with Ford's control unit software, which reduces the risk of diagnostic errors and adaptation issues. For the user, this means:

• more predictable fuel consumption in daily use,
• lower risk of warning lights related to exhaust emissions,
• easier diagnostics in case of faults, thanks to correct communication with the OBD system,
• maintaining compliance with factory injection maps and engine operating strategies. For workshops and service centers, it is also important that this component is easily recognized by diagnostic testers, which facilitates verification of operation after installation.

Technical characteristics and compatibility

The lambda sensor is intended for Diesel fuel systems in the Ford Focus Mk3 with a 1.6 TDCI engine. It should be treated as a component that works directly with the factory engine control unit; therefore, when selecting, it is crucial to refer to the OEM part number and interchangeable numbers visible in the technical specification. This approach minimizes the risk of installing an incompatible sensor and subsequent engine operation problems. Before installation, it is recommended to:

• verify compatibility using the OEM number or reference numbers,
• check the electrical wiring for mechanical damage and contact corrosion,
• perform adaptation / error clearing in the control unit after replacement so that the controller correctly reads the new values.

Product condition and service application

The offered lambda sensor is a used component, which makes it an attractive solution for maintenance repairs when an optimal cost-to-functionality ratio is the priority. This type of part is suitable both for the immediate replacement of a damaged sensor and for broader service work related to the exhaust system or diagnosing exhaust emission problems. In workshop practice, a used lambda sensor can be a good choice, among other situations, when:

• it is necessary to quickly restore vehicle functionality on a limited budget,
• the vehicle has high mileage and is planned for further, but not long-term, operation,
• comparative tests are being conducted to confirm that the fault lies with the O2 sensor and not other system components.

Selection and installation – professional support

When choosing a used lambda sensor and other sensors, it is worth using selection procedures based on the OEM number and vehicle data to avoid hardware and software compatibility issues. A detailed discussion of the principles of selecting, verifying, and installing used sensors and control modules can be found in the Global Parts guide: Used automotive electronics – ECU modules and second-hand sensors. This is a practical source of knowledge that helps reduce the risk of errors when working with electronics and sensors in modern cars. If you are planning a comprehensive repair or upgrade of the exhaust emission control area in your Ford and need other components from the same group, such as additional probes, O2 sensors, or related exhaust sensors, check the available parts in the Ford Lambda sensors and O2 sensors category.