Brake Caliper BMW F20 F21 F22 Petrol N55 B58 M Sport Rear Left N/S 6860737

Visual condition of the part

The product shows signs of use visible in the photos.

Brake Caliper BMW F20 F21 F22 Petrol N55 B58 M Sport Rear Left N/S is an original braking system component designed for installation on the rear left axle of sporty BMW versions with petrol engines. This used M Sport line caliper allows for maintaining factory braking characteristics, ensuring consistency with other system components. It is a solution for users who expect precise brake performance while maintaining reasonable maintenance costs.

Specifications and technical data

• SKU: 6860737-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6860737
• Substitutable numbers: 6860737, 34216860737
• Location on the vehicle: Rear, Left
• Fuel type: Petrol
• Category: Calipers & Brackets

Purpose and compatibility

The presented caliper is designed for BMW F20, F21, and F22 series models with N55 and B58 petrol engines in M Sport versions. The placement on the vehicle is the rear left side, which is important when selecting parts regarding suspension geometry, brake line length, and mounting positions. Thanks to a design consistent with factory BMW standards, the proper clamping force of the pad to the disc and correct cooperation with stability control systems are maintained.

Technical characteristics of the caliper

The caliper belongs to the Brake Calipers and Brackets group, responsible for generating braking force by pressing pads against the disc. The design intended for the M Sport version is optimized for dynamic driving, more frequent and stronger braking cycles, and higher thermal loads. The used component retains the factory geometry of the guides and working surfaces, which enables proper piston retraction and even pad wear.

In combination with properly selected brake discs and pads, the caliper provides stable, repeatable deceleration, which is particularly important in cars with N55 and B58 engines that generate higher performance. Using an original caliper reduces the risk of fitment issues, leaks, or uneven axle braking.

Benefits of using an original M Sport caliper

Choosing a used, original M Sport caliper for the BMW F20, F21, and F22 brings a number of practical benefits:

• maintaining the factory braking characteristics intended for the M Sport version,
• secure fitment to the steering knuckle mounts and brake lines on the rear left axle,
• consistent cooperation with the ABS system and stability control systems,
• the possibility of economical brake system repair while maintaining OEM parts.

For users who use their car intensively, using an original caliper from the same model line minimizes the risk of incorrect distribution of braking forces between the axles. This is especially important in petrol cars, where the performance of N55 and B58 engines requires an efficient, predictable braking system.

Professional selection of used brake components

When replacing the caliper, it is worth paying attention to the condition of cooperating elements, such as discs, pads, flexible hoses, and suspension mounting points. A properly selected and installed caliper on the rear left axle helps avoid vehicle pulling during braking, uneven pad wear, or disc overheating. For users who want to deepen their knowledge on the safe selection of used brake components, the following article will be helpful: Second-hand braking system: how to safely choose discs, calipers, and ABS?.

Expansion and service of the BMW braking system

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 calipers, mounting brackets, or supports, check the available parts in the BMW Brake Calipers and Brackets category.

Summary

Brake Caliper BMW F20 F21 F22 Petrol N55 B58 M Sport Rear Left N/S is a functional solution for drivers who want to restore the full efficiency of the braking system in sporty BMW versions while maintaining the original specification. The used, factory caliper ensures proper fitment, predictable operation, and compatibility with other system components, which translates into safe and stable vehicle operation during daily driving as well as during dynamic acceleration and braking.