Mercedes W205 M274 Petrol Engine Turbo Charger A2740903080

The Mercedes W205 M274 Gasoline Turbo Engine Turbocharger is an original component of the premium supercharging system, designed for this series of gasoline engines. A used turbocharger allows for an economical yet technically correct engine repair or rebuild, while maintaining factory operating parameters.

Specifications and technical data

• SKU: A2740903080
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2740903080
• Substitutable numbers: A2740903080, A 274 090 30 80
• Fuel type: Petrol
• Category: Turbos & Parts

Purpose and technical characteristics

This turbocharger is part of the Turbochargers and Parts category and is factory-fitted to the M274 petrol engine used in the Mercedes W205. Designed specifically for this engine, it ensures proper boost pressure, correct exhaust gas flow, and compatibility with the engine management system.

The component comes from the Mercedes-Benz OE line, which means it retains the original geometry, mounting points, and oil and cooling ports. This allows the turbocharger to work with the factory manifold, lines, and accessories without the need for modifications.

Benefits of using an original turbocharger

The use of a genuine turbocharger in the M274 petrol engine translates into stable engine operation and predictable performance across the entire rev range. In practice, this means:

• correct boost characteristics – consistent with the engine controller maps,
• consistency with the factory exhaust system – proper back pressure and exhaust flow,
• maintaining stock performance – without the risk of overloading the drive unit,
• easier diagnostics – operating parameters are within the ranges provided by the manufacturer.

Choosing a used OEM part is especially beneficial for repairs where maintaining factory specifications is key without the costs associated with new components.

Condition, assembly and fit

The turbocharger offered is a used part, sourced from a disassembly. These components are often chosen for operational repairs where a reasonable budget while maintaining the original design is a priority. Before installation, standard workshop procedures are recommended: checking clearances, tightness, and cleanliness of the oil and intake ports.

Because it's a dedicated component for a specific petrol engine, installation is mostly plug-and-play – maintaining compatibility with the M274 engine and the appropriate W205 body style. In practice, it boils down to:

• use of factory mounting points,
• connections of standard oil and cooling lines,
• maintaining the original intake and exhaust route.

Application in the M274 petrol engine

The M274 engine is a modern supercharged petrol engine, where the turbocharger is crucial for performance and combustion efficiency. A properly selected component allows for:

• stable boost pressure throughout the entire rev range,
• correct response to gas without excessive turbo lag,
• optimal fuel consumption while maintaining driving dynamics.

Replacing a worn or damaged turbocharger with an original component from the same family is one of the most effective ways to restore the full efficiency of the petrol engine in a Mercedes W205.

Why choose a Mercedes-Benz OE turbocharger?

Compared to replacements, the original Mercedes turbocharger offers:

• factory fit for the M274 engine and W205 body,
• consistency with the controller software – no need to modify maps,
• maintaining the standard operating culture – noise and vibration levels in line with the manufacturer's assumptions.

This solution is especially recommended for cars where maintaining the original specification and predictable service costs are important.

If you are looking for other turbochargers dedicated to this brand, check out our offer for turbochargers for Mercedes , where you will find a wide selection of components for various models and engine versions.

When planning broader powertrain modifications or considering improving your car's performance, it's worth exploring practical approaches to tuning based on examples from other brands. For inspiring tips on using used components, check out the article "MINI John Cooper Works – What Makes It Different and How to Improve Your MINI?" , which shows you how to choose components wisely when upgrading your car.