Mercedes A B Class W169 W245 Pillar Airbag Crash Sensor A1698202226 A1698210451

Mercedes A B CLASS W169 W245 Impact Sensor is an original passive safety system component designed for installation in A-Class and B-Class models of the W169/W245 series. As part of the doors and door panels group, the sensor works with the airbag system, enabling its proper response in the event of a collision. A used OEM component is a sensible choice for drivers seeking a technically proven solution at an attractive price.

Specifications and technical data

• SKU: A1698202226
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1698202226
• Substitutable numbers: A1698202226, A 169 820 22 26, A1698210451, A 169 821 04 51, AS
• Category: Doors & Door Skins

Purpose and Function of the Impact Sensor

The impact sensor in Mercedes A-Class and B-Class W169/W245 models is responsible for detecting overloads generated during a collision. Based on the signal from this component, the safety system controller decides on the activation of airbags and seatbelt pretensioners. A properly functioning sensor is crucial for maintaining the cohesion of the entire safety system and compliance with the manufacturer's original specifications.

Construction and Integration with the Body

The presented sensor belongs to the group of elements mounted within the doors and door panels, which allows for precise simulation of body load conditions during a side collision. The OEM construction ensures:

• factory mounting points adapted to the W169/W245 body,
• a compatible electrical connector for the vehicle's wiring harness,
• preservation of the original mounting geometry intended by the manufacturer.

Thanks to this, replacing the component does not require modifications to the bodywork or electrical system, and the installation itself is predictable and repeatable.

Benefits of Using an Original Sensor

Using an original impact sensor in a Mercedes A-Class or B-Class allows for maintaining the safety system's operating parameters at a level close to factory settings. The most important advantages include:

• Maintaining the logic of the airbag system's operation according to the manufacturer's calibration.
• Proper cooperation with the SRS control module without the need for software adaptation.
• Reducing the risk of diagnostic errors related to incompatible aftermarket parts.

A used OEM part is a good solution when technical correctness and compliance with the vehicle's construction are a priority, while simultaneously reducing repair costs.

Condition, Verification, and Part Selection

The offered impact sensor is a used component, sourced from dismantling. Before being introduced for sale, it undergoes a visual inspection for mechanical damage to the housing and connectors. It is recommended to perform SRS system diagnostics using an appropriate tester before installation, which will confirm correct communication with the control module.

When selecting a sensor, it is worth paying attention to:

• compatibility with the W169 or W245 body generation,
• belonging to the doors and door panels category,
• information on part numbers and interchangeable numbers available in the technical specification.

Mercedes Doors and Door Panels – Selecting Related Elements

If you also need other elements from the Mercedes doors and door panels category, such as reinforcements, skins, or additional components mounted within the doors, check out the Mercedes doors and door panels available in our store to select a complete solution for your car.

Practical Service and Operational Tips

When replacing the impact sensor in a Mercedes A-Class or B-Class, it is imperative to disconnect the battery and wait the recommended time before starting work on the SRS system. Installation should be performed while adhering to the torque specifications provided by the manufacturer and with attention to the correct routing of the electrical harness. After completing the installation, it is recommended to:

• clear any errors in the SRS control unit,
• check the sensor's live data parameters with a diagnostic tester,
• verify the absence of warning lights on the instrument cluster.

For drivers interested in a broader approach to vehicle refurbishment and cost optimization, a guide on body and wheel components may be useful – more information can be found in the article Used Wheels Like New – A Guide to Buying and Refurbishing Alloy Wheels, which shows how to make informed choices when selecting used components.