BMW 1 3 SERIES F20 F21 F30 Engine Mount Left N/S 6854251

BMW 1 3 SERIES F20 F21 F30 Engine Mount Left N/S is an original component from the Engine mounts group, designed for installation on the left side of the engine bay. It provides stable support for the powertrain, reduces vibration transfer to the chassis, and improves the refinement of the drivetrain in BMW F-series vehicles.

Specifications and technical data

• SKU: 6854251
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6854251
• Substitutable numbers: 6854251, 22116854251
• Location on the vehicle: Left
• Category: Engine Mounts

Purpose and function of the engine mount

The engine mount on the left side is responsible for maintaining the correct position of the powertrain relative to the chassis and for controlling its movement during acceleration, braking, and load changes. In BMW F-series models, using a properly selected mount:

• stabilizes the powertrain in the transverse and longitudinal axes,
• reduces vibrations felt on the steering wheel, floor, and in the cabin,
• decreases the load transferred to other mounts and powertrain suspension components,
• improves the precision of the drivetrain operation.

As a result, the BMW left engine mount has a direct impact on ride comfort, interior acoustics, and the durability of adjacent components.

Benefits of using an original BMW mount

Using an original engine mount removed from the same BMW model family allows you to maintain the factory performance parameters of the drivetrain. The component was designed specifically for the geometry of the mounts on the chassis and engine, which translates into:

• proper fitment with factory mounting points,
• appropriately selected stiffness and damping characteristics,
• compatibility with other powertrain mounts.

In practice, this means that after replacing it with the correct mount, the engine behaves predictably, excessive movement is prevented, and the drivetrain operates within the range specified by the manufacturer. This is particularly important in BMW vehicles, where handling precision and powertrain stability are key to driving characteristics.

Vehicle placement and installation aspects

The presented mount is intended for installation on the left side of the vehicle. Correct identification of the installation side is important for both safety and the proper distribution of forces acting on the engine mounts. When planning a replacement, it is worth paying attention to:

• exact fitment for the specific body version and engine unit in a given BMW,
• the condition of other engine and transmission mounts,
• the correct tightening sequence and torque settings in accordance with service documentation.

Replacing the left engine mount is often performed in parallel with checking other mounting components, which allows for restoring the consistent behavior of the entire system.

Component condition and service application

The offered engine mount is a used part, sourced from dismantling, which allows for economical repair while maintaining the original BMW design. This type of solution is frequently chosen by professional workshops specializing in the brand, where compliance with factory solutions and the ability to match specific vehicle configurations are valued.

Before installation, standard visual verification and inspection of the component's condition by a mechanic are recommended to confirm that the mount's operating parameters meet the requirements of the specific vehicle.

Technical support and additional information

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other elements from the same group, such as additional mounts, brackets, or other powertrain supports, check out the available parts in the BMW Engine mounts category.

For owners of the 3 and 5 series who are also working on vehicle electronics, a guide on working with modules and the multimedia system may be useful – detailed tips can be found in the article Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 series models using dismantled parts?.