Audi A4 B8 A5 8T A6 C7 Rear Suspension Knuckle Hexagon Socket Bolt WHT003818A

Audi A4 B8 A5 8T A6 C7 Rear Suspension Knuckle Hexagon Socket Bolt is a precision chassis component designed for use in the rear suspension on either the left or right side. It is responsible for a stable connection between the steering knuckle and other components, which directly impacts vehicle handling, wheel alignment, and driving safety. As an original Audi component from the group of fasteners within the steering knuckle area, it is the right choice for professional suspension repairs.

Specifications and technical data

• SKU: WHT003818A-1
• Mark: Audi
• Condition: Used
• OEM Part Number: WHT003818A
• Substitutable numbers: WHT003818A, WHT 003 818 A
• Location on the vehicle: Rear, Right, Left
• Category: Wheel Bearings, Hubs & Seals

Purpose and function in the suspension system

The described bolt operates in the rear suspension area, where it is responsible for a durable and rigid connection between the steering knuckle and mating components. A correctly selected and installed element of this type helps maintain:

• stable wheel tracking in the vehicle's axis,
• proper geometry and alignment,
• even tire wear,
• vehicle control during braking and acceleration.

Thanks to its fitment for the specific rear suspension design of Audi models, the bolt works with other components without the need for modifications, which facilitates service and reduces the risk of incorrect installation.

Compatibility with Audi models

Audi A4 B8, A5 8T, and A6 C7 Rear Suspension Knuckle Bolt has been designed with the specific geometry of these models in mind. Its placement on the vehicle covers the rear axle on both the right and left sides, allowing for flexible application depending on the scope of the repair.

Choosing an original element from this group is particularly important when working on the steering knuckle, bushings, and hubs, where even minor dimensional deviations can affect the operation of the entire system. Using a component that is structurally consistent with the factory solution helps maintain the handling characteristics intended by the manufacturer.

Performance and installation characteristics

The steering knuckle bolt operates in a demanding environment – it is exposed to mechanical loads, temperature changes, and external factors. The proper selection of this element is significant for:

• maintaining the appropriate stiffness of connections in the rear suspension,
• reducing play within the steering knuckle area,
• precise wheel angle adjustment after performing geometry,
• maintaining predictable vehicle behavior in corners.

The element is intended for installation in the factory location, using standard service procedures for Audi suspension. In practice, this means it can be used both when replacing a single bolt and during a more extensive rear suspension overhaul involving steering knuckles, bushings, or hubs.

Part condition and benefits of choosing a used component

The offered bolt comes from a group of used original Audi parts, which allows you to combine structural fitment with cost-effective repairs. In many cases, a used OEM component retains performance parameters sufficient for further operation, while reducing expenses compared to purchasing a new part.

If you want to better understand how to safely use the market for dismantled parts and what to look for when choosing such elements, it is worth reading the article Used car parts: Myths and facts you need to know, which clarifies the most common doubts related to these types of solutions.

Audi wheel bearings, hubs, and bushings – rear suspension expansion and service

During work on the rear axle, it is common to replace not only individual bolts but also mating components such as hubs, bearings, or bushings within the steering knuckle. If you are planning a comprehensive repair or upgrade of the rear suspension zone in your Audi and need other elements from the same group, such as additional mounting bolts, bushings, or components mating with the hub, check the available parts in the Audi wheel bearings, hubs, and bushings category.