BMW E81 E87 E90 E91 E92 LCI Front Left Right N/O/S Brake Disc Ventilated 300X24

Description

BMW E81 E87 E90 E91 E92 LCI Front Left Right N/O/S Brake Disc Ventilated 300X24 is an original braking system component designed for installation on the front axle of popular 1 and 3 Series models. Thanks to its factory-perfect fit for specific BMW versions, it ensures predictable vehicle behavior during braking and consistency with other system components. This is a solution for drivers looking for a proven, used OEM part instead of random aftermarket replacements.

Specifications and technical data

• SKU: 6854998-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6854998
• Substitutable numbers: 34116854998, 6854998, 34116764643, 6764643, 34116772669, 6772669, KZ
• Location on the vehicle: Front, Left, Right
• Offset (ET):
• Category: Brake Disc Rotors

Purpose and compatibility with BMW models

The presented disc belongs to the Brake discs category and has been specifically designed for the front axle of BMW E81, E87, E90, E91, and E92 series vehicles. The mounting position covers both the left and right sides, allowing for flexible use during the service of one or both sides of the braking system. The disc construction complies with the manufacturer’s factory requirements, which facilitates installation and subsequent operation without the need for modifications to the calipers or hub.

Technical and functional characteristics

The brake disc operates in the front braking system, responsible for effectively dissipating the thermal energy generated during braking. The applied geometric parameters, including the dedicated offset, are adapted to BMW specifications, which translates into the correct positioning of the working surface relative to the pads and the stability of the entire set. The appropriately selected working thickness and diameter (in accordance with factory guidelines for these models) promote even pad wear and predictable braking force.

An original disc of this type is designed to maintain proper rigidity and resistance to overheating, which limits the risk of steering wheel vibrations, brake pedal pulsation, or uneven wear. As a result, the braking system maintains stable operating parameters both in daily city driving and during dynamic highway use.

Benefits of using an original, used BMW disc

Choosing an original, used brake disc for a BMW is a solution that allows you to combine cost control with maintaining factory braking characteristics. Discs sourced from the dismantling of original vehicles are designed for a specific platform, thanks to which they:

• ensure proper fitment with the hub and caliper,
• maintain the operating characteristics of the system as intended by the manufacturer,
• limit the risk of compatibility issues typical of random aftermarket replacements.

An additional advantage is the ability to easily verify compatibility using the OEM part number and interchangeable numbers, which facilitates the selection of the component for a specific engine and equipment version. For many BMW users, this is a reasonable compromise between quality and repair cost, especially during comprehensive braking system maintenance.

Mounting zone and service aspects

The disc is intended for installation on the front axle, on the left or right side, which allows for flexible planning of service work – both for one-sided replacement and for servicing the entire axle. In workshop practice, it is recommended to check the condition of both discs and pads, as well as to measure runout and working thickness to ensure even system operation. Using a component that complies with BMW factory specifications facilitates maintaining the correct geometry of the braking system and minimizes installation time.

If you are planning a comprehensive repair or upgrade of the braking zone in your BMW and need other elements from the same group, such as additional discs, compatible pads, or brake lines, check the available parts in the BMW Brake discs category.

How to optimize braking system repair costs

When servicing the braking system, it is worth paying attention not only to the discs but also to the condition of the calipers, guides, and hardware. Properly selected, original recycled components allow you to significantly reduce repair costs without compromising safety. More practical tips on selecting used brake components, including calipers, can be found in the article Brake calipers under the microscope: How to effectively reduce braking system repair costs by choosing proven recycled parts, which will help you consciously plan the service of your BMW.