BMW 1 3 4 Series F20 F21 F30 F31 F32 LCI Vibration Absorber Damper 42HZ 6872917

BMW F20 F21 F30 F31 F32 LCI Rear Differential Vibration Damper 42HZ 6872917 is an original drivetrain component designed to stabilize the rear differential operation in selected BMW 1, 3, and 4 Series models after the facelift. This component, categorized under Other Parts, helps reduce the transfer of unwanted vibrations to the body, improving drivetrain refinement and driving comfort.

Specifications and technical data

• SKU: 6872917
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6872917
• Substitutable numbers: 1722569A, 33176872917, 6872917, PK
• Category: Other Exterior Parts & Accessories

Application and Function in BMW Drivetrain

The rear differential vibration damper in BMW F20, F21, F30, F31, and F32 LCI models is responsible for reducing vibrations generated by the final drive and driveshaft. Thanks to its appropriately selected operating characteristics, this component:

• stabilizes the position of the rear differential relative to the body,
• limits the transfer of torsional vibrations to the chassis and interior of the vehicle,
• supports smooth drivetrain operation during load changes,
• reduces noise and resonances felt during acceleration and engine braking.

In practice, this translates to more predictable vehicle behavior, especially in higher mileage examples where the wear of elastic elements is already noticeable.

Original Origin and Fitment for BMW

The presented vibration damper is a BMW part, prepared to work with the factory drivetrain in the F20, F21, F30, F31, and F32 post-facelift versions. This means:

• maintaining the factory differential mounting geometry,
• compatibility with original mounting points,
• consistency with factory suspension comfort and stiffness settings.

This ensures a predictable installation process without the need for modifications or additional adapters, and the drivetrain retains parameters close to factory specifications.

Characteristics of a Used Component

The offered vibration damper comes from the secondary market, allowing for economical repair while maintaining the original BMW construction. A used component of this type is particularly attractive in situations where:

• the existing component shows significant wear or mechanical damage,
• additional vibrations and knocking are present in the rear suspension area,
• you are looking for a cost-effective solution while maintaining factory specifications.

Choosing an original, used vibration damper helps maintain the structural integrity of the drivetrain, which is especially important in dynamically driven vehicles.

Benefits of Replacing the Rear Differential Vibration Damper

Replacing a worn vibration damper with a functional component in BMW F20, F21, F30, F31, and F32 LCI models brings a number of practical benefits:

• Improved Acoustic Comfort – reduction of noise and resonances in the cabin at various speeds.
• More Stable Drivetrain Operation – less jerking when starting off and changing loads.
• Better Driving Feel – more cohesive rear axle behavior, especially during dynamic driving.
• Protection of Other Components – limiting the transfer of excessive loads to the differential mounts and suspension elements.

For drivers who value precise handling and predictable vehicle response, a functional rear differential vibration damper is an important element in maintaining the vehicle's proper technical condition.

Category and Related BMW Products

If you are also looking for other elements from the Other Parts category dedicated to this brand, check out the available BMW Other Parts to select additional components for your car in one place.

More About Used Parts and Sporty Comparisons

Want to better understand the design differences between sports models and their drivetrains? See the analysis in the article Audi RS vs. Other Models – What Lies Under the Hood and Chassis?, which discusses, among other things, the impact of the drivetrain and suspension on a car's character. If, on the other hand, you have doubts related to choosing parts from the secondary market, check out the guide Used Car Parts: Myths and Facts You Need to Know to approach the purchase of used components consciously.