Mercedes W205 M274 Turbo Charger Part Actuator Petrol 2740904200 A2740903080

Mercedes W205 M274 Turbo Charger Part Actuator Petrol is a precision turbocharging system component responsible for controlling the turbine operation in the M274 petrol engine. Thanks to proper boost pressure regulation, it supports stable power characteristics, smooth acceleration, and correct operation of the power unit across the full load range. This solution is dedicated to Mercedes vehicles, designed to maintain the factory operating parameters of the turbocharger.

Specifications and technical data

• SKU: A2740903080-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2740903080
• Substitutable numbers: A2740903080, A 274 090 30 80, 21867-07, 2186707, 21867, A 274 090 42 00, A 2740904200
• Fuel type: Petrol
• Category: Turbos & Parts

Purpose and role in the turbocharging system

The turbocharger vacuum actuator in the M274 petrol engine is responsible for controlling the turbine geometry or wastegate valve, depending on the specific engine configuration. A properly functioning component ensures:

• controlled boost pressure build-up,
• reduced risk of engine overboost,
• stable operation in both low and high RPM ranges,
• better throttle response and predictable performance.

As a result, the turbocharging system maintains parameters close to factory specifications, which translates into driving comfort and the operational safety of the power unit.

Compatibility and technical parameters

The presented actuator has been designed to work with the M274 petrol engine, used in Mercedes W205 class models and structurally related variants. Using a dedicated solution for this power unit allows for maintaining:

• proper cooperation with the factory turbocharger,
• compatibility with the original vacuum control system,
• appropriate operating characteristics in driving modes provided by the manufacturer.

The component belongs to the Turbochargers and parts group, which means it is an integral part of the turbocharging system, and its technical condition has a direct impact on the turbine's lifespan and the engine's condition.

Characteristics of the used component

The offered vacuum actuator is a dismantled, used part, which provides a cost-effective solution while maintaining compliance with factory specifications. Choosing an original component from the secondary market allows you to:

• maintain consistency with the factory turbocharging system design,
• minimize the risk of fitment and installation issues,
• reduce repair costs compared to purchasing a new turbocharger.

This is a practical option for repairs where maintaining the original design is crucial, while simultaneously optimizing the service budget.

Benefits of use in a petrol engine

In units powered by petrol, precise boost control is of particular importance for engine refinement and durability. A functional turbocharger vacuum actuator influences:

• smooth torque build-up without jerking,
• stable boost pressure values under various driving conditions,
• reduction of thermal and mechanical loads on the turbine,
• more predictable fuel consumption.

By maintaining the correct operation of the turbocharging system, secondary faults, such as excessive engine load or incorrect diagnostic system readings, can be avoided.

Support with selection and further system upgrades

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 turbocharger housings, control valves, or vacuum lines, check the available parts in the Mercedes Turbochargers and parts category.

When planning your service budget, it is also worth learning practical tips on economical vehicle operation – you will find helpful information in the article Economical operation of a Ford – where to look for the biggest savings in mechanical and body repairs, which shows how to approach repairs from the perspective of long-term costs.

If you are interested in a broader context of using original secondary market components in popular car models, it is worth reading the guide The best used car parts – a guide to the most frequently chosen original parts for popular car brands and models, which will help you consciously plan the next stages of repairs and upgrades.