Audi S4 B8 S5 8T Rear Differential Part Housing 3.0 TFSI Quattro 35:9 0BF500043Q

Audi S4 B8 S5 8T Rear Axle Housing 3.0 TFSI Quattro 35:9 is an original drivetrain component designed for the rear axle of Audi vehicles with quattro all-wheel drive. The robust construction of this rear axle housing ensures stable differential mounting, proper driveshaft alignment, and secure torque transfer under demanding operating conditions. This solution is dedicated to users who expect precise fitment and preservation of factory drivetrain parameters.

Specifications and technical data

• SKU: 0BF500043Q-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 0BF500043Q
• Substitutable numbers: 0BF500043Q, 0BF 500 043 Q
• Location on the vehicle: Rear
• Category: Additional Differential Parts

Purpose and Function in the Drivetrain

The rear axle housing in Audi S4 B8 and S5 8T models with a 3.0 TFSI engine and quattro drive is responsible for the stable mounting of the differential and maintaining the correct geometry of the rear drivetrain. A properly selected housing:

• ensures the correct positioning of the main gear relative to the driveshafts and suspension,
• minimizes stress on the internal components of the differential,
• contributes to the smooth operation of the drivetrain under heavy loads,
• reduces the risk of leaks and improper gear meshing.

By maintaining the factory rear axle ratio characteristics, the drivetrain preserves proper traction parameters and predictable vehicle behavior during acceleration and engine braking.

Compatibility with Audi Models

The presented rear axle housing for Audi S4 B8 and S5 8T has been designed to work with the quattro drivetrain in conjunction with the 3.0 TFSI engine. This means that the mounting geometry, attachment points to the body, and differential seating areas are consistent with the factory solutions used in these models.

Selecting the correct housing is crucial for:

• repairs after mechanical damage to the rear axle,
• differential refurbishment requiring housing replacement,
• drivetrain swaps between compatible Audi versions.

Using an original design allows for correct alignment with suspension components, the driveshaft, and the driveshafts, which translates to predictable vehicle handling.

Technical Characteristics and Installation

The rear axle housing is a component installed in the rear part of the vehicle, in close proximity to the driven axle suspension. Its function is not only to house the differential but also to transfer loads resulting from suspension and drivetrain operation to the body structure.

During installation, it is important to pay attention to:

• thorough cleaning of the contact surfaces with the differential and sealing elements,
• checking the condition of the mounting points to the body and bushings,
• applying the correct torque values according to Audi service documentation,
• checking alignment with the driveshaft and driveshafts after installation is complete.

A correctly installed housing reduces vibrations and noise, and also supports even load distribution within the drivetrain.

Why Choose an Original Audi Rear Axle Housing

Choosing an original rear axle housing from the Other Differential Parts category primarily ensures a perfect fit for the specific Audi S4 B8 or S5 8T configuration. A design consistent with factory standards allows for:

• seamless integration of the quattro drivetrain with other components,
• appropriate rigidity and durability of the rear drivetrain section,
• continued serviceability according to manufacturer procedures.

This solution is particularly recommended for repairs where maintaining the original handling characteristics and vehicle behavior on the road is a priority.

If you are planning a comprehensive repair or upgrade of the rear drivetrain in your Audi and need other parts from the same category, such as housings, brackets, or additional differential components, check the available parts in the Other Audi Differential Parts category.

Support for Choosing Used Parts

The selection of the appropriate rear axle housing and other drivetrain components should be based on reliable sources and the experience of users with similar models. To better understand how to effectively navigate the used parts market and what to look for when purchasing, consult the guide Best Used Car Parts – A Guide to the Most Popular Original Parts for Common Car Brands and Models. This will help you more easily assess which components will be the right choice for servicing your Audi.