Mercedes R172 Petrol M274 Engine Carrier Mount Rear Support Bracket A1722420901

Mercedes R172 Petrol M274 Engine Carrier Mount Rear Support Bracket is an original component from the Engine mounts category, designed for the rear section of the drivetrain in Mercedes vehicles equipped with the M274 petrol engine. This used component ensures a factory fit, and its design supports the stable operation of the powertrain, reducing vibrations and improving engine refinement.

Specifications and technical data

• SKU: A1722420901
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1722420901
• Substitutable numbers: A1722420901, A 172 242 09 01
• Location on the vehicle: Rear
• Fuel type: Petrol
• Category: Engine Mounts

Function of the rear engine mount

The rear engine mount in the drivetrain is responsible for transferring loads from the powertrain to the chassis and for controlling the movement of the powertrain during acceleration, braking, and gear changes. In the case of M274 petrol engines, a properly selected rear mount helps to reduce:

• excessive vibrations transmitted to the body and the vehicle interior,
• unwanted movement of the powertrain during dynamic driving,
• loads acting on other drivetrain components.

Thanks to this, engine operation stability remains at an appropriate level, which contributes to driving comfort and the durability of adjacent components.

Designed for the M274 petrol engine

The presented rear mount has been designed for petrol units from the M274 family, used in modern Mercedes models. The operating characteristics of a petrol engine require appropriately selected stiffness and damping, which is why using the correct mount is essential for:

• maintaining the correct geometry of the powertrain,
• reducing noise and vibration in the cabin,
• maintaining predictable vehicle behavior during load changes.

Selecting a component dedicated to a specific fuel type helps avoid problems with excessive deflection or overly rigid vibration transmission.

Benefits of using an original engine mount

Using an original rear mount in a Mercedes vehicle translates into a number of practical operational benefits. Among the most important are:

• Factory fit – compatibility with the body and drivetrain design, without the need for modifications.
• Consistency with other engine mounting elements – front mounts and brackets.
• Maintenance of the vibration damping characteristics specified by the manufacturer.

For the user, this means predictable vehicle behavior, a reduction in knocking and vibrations, and a more comfortable ride, especially in the low and medium RPM ranges.

Used condition and installation aspects

The offered rear engine mount is a used component, which allows for an economical repair of the drivetrain while maintaining the original manufacturer's specifications. Before installation, a standard visual inspection and a check of the condition of mating components, such as other engine mounts and transmission mounts, are recommended.

In practice, replacing the rear mount is most often performed in situations where the following occur:

• noticeable vibrations at idle or when starting off,
• knocking during sudden acceleration or deceleration,
• excessive rocking of the powertrain during gear changes.

Selecting a component compatible with the vehicle's design facilitates the mechanic's work and reduces vehicle downtime at the service center.

Mercedes engine mounts – expansion and modernization

If you are planning a comprehensive repair or modernization of the engine area in your Mercedes and need other elements from the same group, such as additional mounts, brackets, or other powertrain support points, check the available parts in the Mercedes engine mounts category.

More about used components in modern cars

When deciding to use second-hand components in a vehicle, it is worth knowing the broader context regarding component selection and their impact on operation. Practical tips on assessing condition, selection principles, and the cost-effectiveness of using second-hand parts can be found in the article: The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?.