BMW X5 X6 SERIES E70 E71 Rear Left N/S Control Arm Wishbone Rod Axle 6770979

BMW X5 X6 E70 E71 Rear Left Trailing Arm is a component from the Control Arms & Ball Joints category, designed for the rear suspension of the vehicle. Engineered for the rear axle on the left side, it supports stable vehicle handling and precise suspension geometry maintenance. A used genuine BMW part offers a functional solution for repairs or restoring factory handling characteristics.

Specifications and technical data

• SKU: 6770979
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6770979
• Substitutable numbers: 33326770979, 6770979
• Location on the vehicle: Rear, Left
• Category: Control Arms, Ball Joints & Assemblies

Purpose and Function in BMW X5 / X6 Suspension

The rear axle trailing arm is responsible for controlling the wheel's position relative to the body and for transferring loads generated during acceleration, braking, and traversing uneven surfaces. In BMW X5 E70 and BMW X6 E71 models, this component works in conjunction with other control arms and ball joints to form a cohesive wheel control system.

Its placement on the rear left side of the vehicle ensures compatibility with the specific suspension geometry of these models. This allows the arm to maintain appropriate connection rigidity, contributing to stable vehicle handling and predictable cornering behavior.

Construction and Compatibility with Control Arms & Ball Joints Category

As a component within the Control Arms & Ball Joints group, the trailing arm is part of the multi-link rear suspension design of BMW vehicles. Its function is to maintain the correct position of the wheel hub and limit unwanted movements that could affect toe and camber angles.

Proper fitment for the E70/E71 platform means its shape, mounting points, and operating characteristics are in line with the manufacturer's original specifications. This ensures consistency with other suspension components and minimizes the risk of geometry issues after installation.

Benefits of Using a Genuine BMW Trailing Arm

Using a genuine trailing arm in a BMW X5 or X6 offers several practical benefits for everyday operation:

• Structural Compatibility – a component designed for the specific axle and side of the vehicle, requiring no modifications.
• Cohesive operation with other control arms and ball joints, simplifying geometry alignment after repair.
• Restoration of factory handling characteristics, particularly important for heavier BMW SUVs.
• Suitable for professional suspension repairs where predictable component behavior under load is crucial.

Condition, Installation, and Service Application

The trailing arm is offered as a used genuine BMW part, enabling cost-effective repairs while maintaining compliance with the original design. This type of part can be used for replacing a single control arm or during a comprehensive rear suspension overhaul.

Its specified placement as rear left simplifies selecting the correct component during service work. During installation, it is recommended to inspect other components in the control arms and ball joints category and perform a geometry alignment to fully utilize the potential of the newly installed arm.

Related Products and Technical Knowledge

If you are looking for other BMW control arms and ball joints for your vehicle, check out the BMW control arms and ball joints available in our store to select a complete solution for both the front and rear axles.

For a better understanding of suspension operation and the impact of trailing arms on vehicle handling, we recommend reading the guide on our blog: Suspension System – A Comprehensive Guide to Shock Absorbers, Control Arms, and Stabilizers. There you will find practical tips on diagnosing and maintaining suspension components in various models.