Audi S6 C6 5.2 Quattro Front Axle Suspension Subframe Cradle 4F0399313AB

The Audi A6 S6 5.2 Quattro Front Axle Cradle Subframe is a structural component from the category of longitudinal body frame parts and brackets, designed for installation in the front of the vehicle. It is responsible for the stable support of the powertrain and suspension assembly, ensuring proper geometry and body rigidity in higher-class Audi models.

Specifications and technical data

• SKU: 4F0399313AB
• Mark: Audi
• Condition: Used
• OEM Part Number: 4F0399313AB
• Substitutable numbers: 4F0399313AB, 4F0 399 313 AB
• Location on the vehicle: Front
• Category: Frame Rails & Subframes

Purpose and Function in the Vehicle

The front axle cradle in Audi plays a crucial role as a structural support for suspension components, the steering system, and the powertrain. Its placement at the front of the vehicle allows for the transfer of loads from the wheels to the body, which affects:

• maintaining predictable vehicle behavior during braking and acceleration,
• stable handling in corners at higher speeds,
• precise maintenance of suspension geometry according to the manufacturer's specifications.

In Audi A6 and S6 models with Quattro drive, the cradle is particularly important as it works in conjunction with the advanced drivetrain and multi-link front suspension.

Construction and Technical Characteristics

The presented element belongs to the category of longitudinal body frame parts and brackets, meaning it is designed to withstand significant operational loads. The cradle's construction ensures:

• adequate torsional rigidity of the front body section,
• stable mounting points for control arms and suspension components,
• precise positioning of the powertrain relative to the body.

As an OEM Audi part, the cradle is designed to meet factory tolerances, which translates to proper fitment with other front axle components.

Application in Audi A6 / S6 5.2 Quattro

The front axle cradle subframe is dedicated to Audi A6 and S6 vehicles with the 5.2 engine and Quattro drive, where the loads resulting from the massive engine and four-wheel drive are higher than in standard versions. Using the appropriate cradle allows for:

• maintaining the vehicle's factory handling characteristics,
• proper operation with the Quattro drivetrain,
• reducing unwanted vibrations transmitted to the body.

The element is mounted in the front of the vehicle, according to the factory mounting points specified by the manufacturer.

Condition, Origin, and Benefits of Choosing a Used Part

The offered cradle is a used part, sourced from a dismantled Audi vehicle. Choosing an original used subframe is a solution that allows you to:

• optimize repair costs while maintaining the factory design,
• ensure compliance with the manufacturer's design in terms of geometry and rigidity,
• reduce the risk of installation problems typical of lower-precision aftermarket replacements.

Before installation, standard verification of the mounting surface condition and post-installation suspension geometry check are recommended to fully utilize the part's potential.

Why Choose Original Audi Longitudinal Body Frame Parts and Brackets

For load-bearing elements such as Audi longitudinal body frame parts and brackets, maintaining the structural parameters specified by the manufacturer is crucial. Original components ensure:

• factory mounting points for the suspension and steering system,
• harmonious operation of the entire chassis with safety systems,
• adequate fatigue life during daily operation.

If you are looking for other parts in this category, check out the available Audi longitudinal body frame parts and brackets to find a complete structural solution for your car.

More About Tuning and Using Used Parts

The front axle cradle can be part of a larger suspension upgrade project or a post-collision repair, carried out using parts from dismantling. If you want to better plan such modifications, see the guide Tuning with Used Parts – How to Gain Performance Without Losing a Fortune, which discusses how to safely use used components while maintaining an adequate margin of safety and reliability.