Brake Caliper BMW X5 E70 X6 E71 Rear Left N/S Brake Housing Carrier 40/20/320

The BMW X5 E70 X6 E71 Rear Left Brake Caliper 40/20/320 is an original BMW braking system component designed for installation on the rear left axle. This used caliper from this series is a solution that allows you to maintain factory braking characteristics while reducing service costs and ensuring high precision of the system's operation.

Specifications and technical data

• SKU: 6776787-3
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6776787
• Substitutable numbers: 6776787, 34216776787
• Location on the vehicle: Rear, Left
• Category: Calipers & Brackets

Intended Use and Fitment for BMW X5 E70 / X6 E71

The presented caliper is designed for operation at the rear of the vehicle, on the left side, in BMW X5 E70 and X6 E71 models. It is responsible for evenly pressing the pads against the disc, which translates to stable, predictable braking for a heavy SUV, both in city traffic and during highway driving.

Thanks to its construction conforming to factory BMW standards, the correct mounting points, geometry, and piston operating parameters are maintained, facilitating installation and ensuring compatibility with the original braking system of these models.

Construction and Technical Characteristics

The caliper belongs to the group of Brake Calipers and Brackets, responsible for the mechanical execution of braking force generated by the hydraulic system. The design intended for the rear axle provides appropriately selected clamping force, adjusted to the vehicle's weight distribution and the operation of ABS and traction control systems.

The piston system and caliper body have been optimized for efficient heat dissipation and even pad wear, which contributes to stable braking force over the long term. Proper pad guidance minimizes the risk of jamming and uneven contact with the disc.

Condition, Origin, and Benefits of Choosing a Used Part

This component comes from the original BMW production line and is offered as a used part. In practice, this means maintaining factory quality of workmanship, proper fit with the caliper bracket and brake lines, as well as compliance with the vehicle manufacturer's requirements regarding safety and durability.

Choosing a used, original brake caliper allows for a significant reduction in repair costs compared to a new component, while preserving the design intended by BMW engineers. This solution is particularly beneficial for comprehensive rear axle service work where discs, pads, and other system components are replaced simultaneously.

To better understand how to safely use salvaged parts and assess their suitability, it is worth reading the guide: Brake Calipers Under the Microscope: How to Effectively Reduce Braking System Repair Costs by Choosing Proven Salvaged Parts.

Safety, Operation, and Installation Recommendations

The rear left brake caliper is crucial for vehicle stability during braking, especially in emergency situations and during active operation of the stability control systems. A correctly selected and functional component reduces the risk of the car pulling to one side, uneven pad wear, and disc overheating.

During installation, it is recommended to:

• thoroughly clean the mounting surfaces on the wheel hub and caliper bracket,
• verify the condition of the brake lines and bleed the system after installation,
• check the thickness of the discs and pads and consider replacing them in pairs on the axle,
• verify the correct operation of the mechanism after the first few kilometers of use.

This approach allows for the full utilization of the used caliper's potential and ensures stable, repeatable brake performance in everyday driving.

Expanding the BMW Braking System – Related Components

If you are planning a comprehensive repair or upgrade of the braking zone in your BMW and need other components from the same group, such as additional calipers, caliper brackets, or mounting brackets, check the available parts in the BMW Brake Calipers and Brackets category.

For owners of BMW X5 E70 and X6 E71 who are simultaneously upgrading other vehicle systems, specialized guides on selecting original lighting components, such as LED or Xenon headlights, may also be useful – more information can be found in the article: See More and Better – A Complete Guide to Selecting and Replacing Used LED and Xenon Headlights.