Breather Valve Mercedes W205 Vacuum Solenoid Valve A0009976912

The Mercedes W205 High Pressure Breather Valve is a precision component of the breather system designed for petrol engines with code 626951. A used valve with low mileage ensures stable operation of the drive unit, reducing the risk of uncontrolled overpressure and oil leaks.

Specifications and technical data

• SKU: A0009976912
• Mark: Mercedes
• Condition: Used
• OEM Part Number: A0009976912
• Substitutable numbers: A0009976912, A 000 997 69 12
• Fuel type: Petrol
• Category: Air Bypass Valves

Technical characteristics of the Mercedes W205 pneumothorax valve

The high pressure vent valve in this version works in the petrol fuel system, working with the engine with code 626951. Its task is to control the removal of gases from the crankcase, which affects:

• pressure stabilization in the lubrication system,
• reducing blow-by and contamination in the intake,
• more even operation of the drive unit across the full load range.

The element belongs to the category of bypass valves, which means that it acts as a precise flow regulator under specific pressure conditions, cooperating with the factory calibration of the engine controller.

Purpose and use in a petrol engine

The presented valve was designed to work in the Mercedes W205 petrol engine, in the version with engine code 626951. Thanks to the design adaptation to the specific unit:

• the correct characteristics of the gas flow from the pneumothorax are maintained,
• the risk of unstable idle speed is reduced,
• excessive oiling of the intake system is limited.

A used component with low mileage is a reasonable choice when servicing the pneumatic system, especially when you want to maintain the original engine operating characteristics without interfering with the software.

Condition, Origin, and Benefits of Choosing a Used Valve

The valve offered is in used condition, allowing for a competitive price while maintaining factory specifications. Low mileage translates into limited wear of moving parts and springs, which is important for tightness and repeatable operation under high pressure conditions.

Choosing an original bypass valve in a used version includes:

• better fit to a specific engine than many substitutes,
• maintaining the operating parameters of the pneumothorax system specified by the manufacturer,
• reducing the risk of diagnostic errors related to incorrect gas flow control.

Integration with the engine system and service aspects

The Mercedes W205 high-pressure pneumatic valve is compatible with the factory petrol engine fittings, making it easy to replace the worn component. When replacing, we recommend:

• checking the pneumothorax ducts for leaks,
• checking the condition of the connectors and bayonet connections,
• verification of engine operating parameters after assembly (speed stability, no excessive smoke, no errors in the controller).

This service approach allows you to fully utilize the potential of a functioning, used valve and restore the proper operating conditions of the drive unit.

Related Categories and Technical Materials

If you're looking for other bypass valves for Mercedes, check out our dedicated category: Bypass Valves for Mercedes . This will allow you to easily compare available solutions within the same component group.

When planning a comprehensive service of the engine's auxiliary systems, it is also worth familiarizing yourself with the subject of exhaust gas recirculation valves - the article: EGR: what is it and why it is worth considering used EGR valves , which organizes knowledge about the operation of valves in modern combustion engines, may be helpful.