BMW 1 3 Series F20 F21 LCI Spacer Bolt 8580379 M8X12 L81,5

BMW 1 3 Series F20 F21 LCI Spacer Bolt M8X12 L81,5 is an original BMW mounting component, designed for the precise positioning and spacing of sub-assemblies in 1 and 3 Series models after the facelift. Thanks to its factory geometry and M8 thread, it ensures a stable bolted connection and repeatable assembly conditions at critical points of the bodywork or powertrain. This solution is particularly useful for professional repairs where compliance with the manufacturer's service documentation is essential.

Specifications and technical data

• SKU: 8580379
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8580379
• Substitutable numbers: 8580379, 11148580379, 11148573986, 8573986
• Category: Other Car Parts & Accessories

Application and spacer function

The presented spacer bolt has been designed for the precise alignment of components in the construction of the BMW 1 Series F20/F21 LCI and 3 Series. The properly selected working length and M8 thread diameter allow for:

• maintaining the correct distance between mating parts,
• reducing stresses resulting from improper fitment,
• maintaining compliance with factory mounting points.

As a result, it reduces the risk of assembly play, unwanted vibrations, and accelerated wear of adjacent components.

Construction and mounting parameters

The M8X12 L81,5 spacer bolt combines the function of a classic threaded fastener with the role of a precision spacer. The design has been optimized for:

• stable guidance in the mounting seat,
• reliable transfer of axial and lateral loads,
• repeatable tightening torque in accordance with BMW guidelines.

Such a solution is particularly important in areas where precise positioning of engine accessories, covers, brackets, or other structural sub-assemblies is required.

Original origin and BMW fitment

As a BMW brand component, the spacer bolt has been developed for full compatibility with factory mounting points in 1 and 3 Series vehicles. This means:

• exact fit to threads and seats provided by the manufacturer,
• preservation of the original assembly geometry after repair or replacement,
• consistency with BMW service documentation and parts catalogs.

Thanks to this, you minimize the risk of assembly problems typical of aftermarket parts with similar, but not identical, dimensions.

Condition and service application

The item is offered in used condition, which allows for an economical yet technically correct repair in situations where it is necessary to restore the original mounting system. These types of spacer bolts are often required for:

• professional accident repairs,
• restoring the factory accessory mounting system,
• precise assembly of components after engine or auxiliary unit disassembly.

By choosing an original BMW component, you maintain the structural integrity of the vehicle and facilitate future service maintenance.

Configuration expansion and BMW retrofit

Spacer bolts of this type are also often used when retrofitting the vehicle with additional accessories or during so-called retrofitting, where maintaining factory mounting points and distances is crucial. If you are interested in the broader context of using original mounting elements for vehicle modernization, it is worth checking out the guide Retrofitting in VAG and BMW group cars – practical use of used parts, which discusses how to reasonably plan retrofitting using components from disassembly.

Other BMW mounting components

If you are planning a comprehensive repair or modernization of the mounting area in your BMW and need other elements from the same group, such as additional bolts, spacers, or special fasteners, check the available parts in the Other BMW category.

Technical knowledge and part selection

When selecting mounting components for premium class cars, it is worth relying on reliable technical knowledge and experience from motorsport and high-performance versions. For a better understanding of how manufacturers differentiate component construction – from the engine, through brakes, to chassis elements – the article Audi RS vs other models – what is hidden under the hood and chassis? may be helpful, as it shows how structural details affect the durability and operating characteristics of the entire system.