Audi A4 S4 B8 A5 S5 8T 8F Gearbox Protection Plate Bracket Left N/S 8T0399379A

Audi A4 S4 B8 A5 S5 8T 8F Gearbox Protection Plate Bracket Left N/S is an original structural component designed to protect the side of the transmission in Audi vehicles. Designed as a factory component, it ensures precise fitment to the chassis and stable mounting on the left side of the vehicle. As a result, it provides a solid solution for users looking for a proven, used part with maintained functionality.

Specifications and technical data

• SKU: 8T0399379A
• Mark: Audi
• Condition: Used
• OEM Part Number: 8T0399379A
• Substitutable numbers: 8T0399379A, 8T0 399 379 A
• Location on the vehicle: Left
• Category: Other Engine Parts

Purpose and function of the protection plate

The presented protection plate is a component mounted on the left side of the gearbox, responsible for protecting its housing against dirt, road debris, and moisture. A properly selected protection plate reduces the risk of mechanical damage and accelerated corrosion of components located in the transmission area, which helps maintain stable operating conditions for the drivetrain. Using an original protection plate in Audi A4 / S4 B8 and A5 / S5 8T / 8F models allows for maintaining the factory chassis geometry, correct airflow guidance around the gearbox, and proper drainage of contaminants. This is particularly important in cars operated in varied road conditions, where the drivetrain is exposed to contact with water, mud, and small stones.

Construction and vehicle fitment

The protection plate has been designed as a component dedicated to specific Audi body versions, which translates into precise fitment with mounting points and adjacent chassis components. The shape and profile of the part are adapted to the design lines in the gearbox area, ensuring that no unwanted stress or collisions with other elements occur after installation. The placement on the vehicle on the left side allows for clear identification of the part when planning repairs or replacement. This facilitates work for mechanics and individuals servicing the car themselves, minimizing the risk of selecting the wrong component. A properly selected protection plate also supports maintaining the correct local structural rigidity in the gearbox area.

Condition, origin, and service application

The offered protection plate comes from an Audi vehicle dismantling and is sold as a used part. Such components are frequently chosen for post-accident repairs, replacement of damaged chassis elements, or when rebuilding a daily-driven car. A used original part represents a reasonable compromise between cost and maintaining factory fitment parameters. The left-side gearbox protection plate will work well both for standard replacement of a damaged element and in vehicle reconstruction projects after a collision, where it is important to restore the correct chassis line guidance and drivetrain protection. Using an original component reduces the need for installation modifications and speeds up service work.

Benefits of using an original protection plate

• Factory fitment for Audi A4 / S4 B8 and A5 / S5 8T / 8F models in the gearbox area.
• Protection of the transmission against dirt and mechanical damage from the left side.
• Stable mounting thanks to the use of original chassis mounting points.
• Reasonable cost solution for repairs using used parts.
• Support for maintaining proper drivetrain operating conditions.

Additional information and technical materials

If you are planning a comprehensive repair or upgrade of the chassis area in your Audi and need other elements from the same group, such as covers, side shields, or additional protective panels, check the available parts in the Other Audi category. For a better understanding of the structural differences between sports versions and standard models of this brand, it is worth reading the material discussing the construction of engines, brakes, and chassis – details can be found in the article Audi RS vs other models – what is hidden under the hood and chassis?. If you are rebuilding your car in a garage and want to consciously use used components, practical tips on planning repairs and selecting parts from dismantling can be found in the guide Garage project: how to affordably rebuild your "daily" using proven parts from dismantling.