Mercedes W213 S213 Pressure Sensor Brake Booster Vacuum Servo A0009051001

Mercedes W213 S213 Pressure Sensor Brake Booster Vacuum Servo is a precision brake system component belonging to the Brake Servos and Pressure Regulators group. It is responsible for monitoring pressure in the booster circuit, which translates into stable, predictable brake pedal response and safe deceleration in Mercedes E-Class W213/S213 models. Using an original OEM component allows you to maintain the factory performance characteristics of the braking system without compromising on fitment.

Specifications and technical data

• SKU: A0009051001
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0009051001
• Substitutable numbers: A0009051001, A 000 905 10 01
• Category: Brake Servos

Function and role in the braking system

The brake booster pressure sensor in the Mercedes W213/S213 monitors the hydraulic circuit parameters and transmits signals to the control units responsible for modulating braking force. A properly functioning component of this type:

• ensures stable cooperation with the servo and brake pressure regulator,
• supports the operation of safety systems (ABS, ESP, emergency brake assist),
• reduces the risk of uneven brake force distribution between the axles,
• helps maintain consistent brake pedal characteristics under various load conditions.

As a result, the driver receives a predictable system response, which is particularly important in premium vehicles such as the Mercedes E-Class.

Benefits of using an original Mercedes component

Choosing a sensor from the Brake Servos and Pressure Regulators group sourced from Mercedes ensures the preservation of factory operating parameters. An original component from this brand offers, among other things:

• precise fitment to the electrical and hydraulic installation of the specific W213/S213 generation,
• consistency of characteristics with other braking system components,
• preservation of the logic of driver assistance systems,
• lower risk of diagnostic errors in the vehicle's control units.

A used, factory-original brake booster pressure sensor is a solution that allows you to balance cost control with maintaining a high level of safety and driving comfort.

Selection, diagnostics, and installation

When selecting this type of component, it is crucial to rely on vehicle identification data and part numbers to ensure full compatibility with the specific version of the Mercedes W213 or S213. In workshop practice, the brake booster pressure sensor is most often replaced in situations where:

• errors appear in the control unit memory related to brake system pressure,
• the driver feels a non-linear or variable brake pedal response,
• ABS/ESP systems signal a fault despite mechanical components being in good working order.

Professional installation involves correctly seating the sensor in the system, maintaining connection tightness, and performing adaptation or clearing errors in the control units, if required by the specific model.

Integration with other Mercedes braking system components

The brake booster pressure sensor works directly with the servo, the brake pressure regulator, and electronic systems responsible for vehicle stability. In the case of comprehensive brake system maintenance, it is worth treating it as part of a larger system where component consistency matters. If you are planning a comprehensive repair or upgrade of the braking zone in your Mercedes and need other elements from the same group, such as a brake servo, pressure regulator, or additional control elements, check the available parts in the Mercedes Brake Servos and Pressure Regulators category.

Used sensor and repair cost-effectiveness

Using a used, original brake booster pressure sensor is often a reasonable compromise between cost and quality. Such electronic and measuring components, when the vehicle is operated correctly, retain their properties for a long time, which is why their reuse in another car is a practice accepted in professional workshops. For drivers and workshops that want to take a conscious approach to parts selection, a guide discussing the differences between OEM components, replacements, and aftermarket parts may be helpful – you can find it in the article Original, replacement, or used – which car parts are the most cost-effective?.

Operational comfort and the condition of the braking system

A functional brake booster pressure sensor affects not only safety but also driving comfort – stable braking system operation reduces driver fatigue in city traffic and during long journeys. As part of comprehensive vehicle maintenance, it is worth combining brake system checks with inspections of other systems affecting comfort, such as air conditioning and heating. Practical tips on selecting and servicing comfort components can be found in the guide Air conditioning and heating – parts selection and maintenance for year-round comfort.