Mercedes-Benz A B Class W168 W169 Air Intake Pressure Sensor Switch A1695401717

Mercedes-Benz A B Class W168 W169 Air Intake Pressure Sensor Switch is a precision component from the Air and fuel intake sensors category, responsible for the correct reading of the parameters of the air drawn into the engine. Accurate pressure measurement allows the engine control unit to optimize fuel dosage, which translates into stable engine operation, better throttle response, and reduced fuel consumption.

Specifications and technical data

• SKU: A1695401717
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1695401717
• Substitutable numbers: A1695401717, A 169 540 17 17, EM
• Location on the vehicle: Front
• Category: Air Intake & Fuel Sensors

Function and role of the air pressure sensor

The air pressure sensor in Mercedes W168 and W169 models operates in the front part of the vehicle, in the air intake area. Based on the signal from this component, the engine control unit calculates the amount of air reaching the cylinders and then selects the appropriate fuel dose. A properly functioning sensor helps maintain:

• stable idle speed,
• smooth acceleration without jerking,
• correct air-fuel mixture,
• reduced smoke and exhaust emissions.

Thanks to this, the fuel system operates in a predictable manner, and the engine retains its factory performance parameters.

Benefits of using an original Mercedes sensor

The component from the Air and fuel intake sensors group dedicated to Mercedes ensures proper fitment to the electrical installation and the intake manifold design. The correct signal characteristic is crucial for proper cooperation with the engine control unit, which is why using the correct sensor helps avoid problems such as:

• storing errors in the controller memory and the check engine light turning on,
• increased fuel consumption resulting from incorrect pressure readings,
• power loss and poorer engine flexibility.

Selecting the component according to the manufacturer's markings allows for maintaining factory control logic and stable operating parameters, which is particularly important in premium class vehicles such as Mercedes.

Vehicle placement and installation aspects

The sensor is designed for installation in the front part of the vehicle, in the intake system zone. This placement ensures direct measurement of the air pressure entering the engine, without delays or interference. When replacing, it is worth paying attention to:

• the cleanliness of the mounting socket in the manifold or intake duct,
• the condition of the electrical connector and the absence of corrosion on the pins,
• proper routing of the wiring harness to avoid stress and abrasion.

Careful installation promotes long-term and repeatable sensor operation, and also reduces the risk of errors related to circuit breaks or signal interference.

Product characteristics and application

The presented sensor is a component intended for Mercedes vehicles from the W168 and W169 series, where the engine control system uses intake air pressure measurement as one of the primary data sources. The product comes from the segment of original components, which helps maintain compatibility with the factory installation and engine operating parameters.

In the case of diagnosing symptoms such as uneven engine operation, power loss, or increased fuel consumption, checking and potentially replacing the air pressure sensor is one of the basic service steps in the intake system area.

Technical support and additional information

To better understand the connection between air measurement and fuel dosage, it is worth reading the material discussing the construction and operation of the fuel system, including injectors and fuel pumps – this is described in detail in the article Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration, which helps in the correct diagnosis of the entire system.

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other elements from the same group, such as air temperature sensors, flow sensors, or other measuring components, check the available parts in the Mercedes air and fuel intake sensors category.

For users interested in making informed choices about components for premium cars amidst rising costs of new parts, the material describing current market trends may also be helpful: Crisis in the new parts market? Why used originals for premium cars are the hottest trend in 2026, which explains when it is worth choosing used OEM elements.