BMW F20 F21 F30 F31 F33 F34 Vibration Absorber Damper 40HZ 6798890

BMW F20 F21 F30 F31 F33 F34 Vibration Absorber Damper 40HZ is an original rear suspension component, designed by BMW to precisely limit vibrations in the vehicle body. Thanks to a specifically tuned operating frequency, the damper improves vehicle stability, reduces vibrations, and supports driving comfort in typical road conditions.

Specifications and technical data

• SKU: 6798890-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6798890
• Substitutable numbers: 33316798890, 6798890
• Location on the vehicle: Rear
• Category: Other Exterior Parts & Accessories

Purpose and function of the 40HZ vibration damper

The vibration damper in the rear of the vehicle is responsible for reducing resonances transmitted from the suspension and body, which is important for both comfort and the durability of structural components. In the case of the BMW F20, F21, F30, F31, F33, and F34 series, the use of a dedicated damper with a specific operating frequency allows for:

• reducing noticeable vibrations in the cabin at typical driving speeds,
• stabilizing the rear bodywork under load,
• more predictable vehicle behavior on uneven surfaces. A properly selected vibration damper is particularly important in vehicles used daily, where consistent, smooth vehicle behavior across a wide speed range is essential.

Compatibility with the BMW F-series platform

The presented damper has been developed for the BMW F-series platform, covering selected body versions of the F20, F21, F30, F31, F33, and F34. This means that its geometry, mounting method, and operating characteristics are adapted to the construction of the rear section of these models. Using a component from the same vehicle family allows for maintaining:

• consistency of handling characteristics with the manufacturer's specifications,
• proper weight distribution in the rear of the car,
• correct interaction with the factory suspension. For users who expect to maintain the factory driving character, choosing an original vibration damper is a safe and predictable solution.

Vehicle placement and installation aspects

The damper is designed for installation in the rear of the vehicle, in the area of the body's load-bearing structure. Its position has been selected to effectively compensate for vibrations generated by the operation of the suspension, wheels, and drivetrain components. During replacement, it is worth paying attention to:

• correct seating in the mounting points,
• the condition of the contact surface with the body,
• the use of appropriate tightening torques in accordance with BMW service documentation. Proper installation has a direct impact on the effectiveness of vibration damping and the durability of the component itself.

Product characteristics and benefits of use

As a component from the BMW range, the vibration damper has been designed for long-term interaction with the body and suspension structure. Using an original component in place of a worn or damaged one allows you to:

• restore the factory level of acoustic and vibration comfort,
• reduce the risk of unwanted resonances in the rear of the body,
• maintain predictable vehicle behavior during changes in load and speed. The product in used condition represents a reasonable compromise between cost and maintaining the original manufacturer's specifications, which is especially important for vehicles that are used intensively but still require a high level of operational refinement.

Technical support and further knowledge

For drivers interested in a deeper understanding of how chassis components influence the handling and character of a sports car, material comparing solutions used in high-performance versions may be helpful. In this context, it is worth reading the article Audi RS vs other models – what is hidden under the hood and chassis?, which discusses the differences in engine, brake, and chassis construction using the Audi range as an example. If you are planning a comprehensive repair or upgrade of the rear suspension zone in your BMW and need other components from the same group, such as additional vibration dampers, brackets, or mounts, check the available parts in the Other BMW category.