Audi A8 D4 4.2 TDI Quattro MXX Gearbox Housing Case 0BL300035JX

Audi A8 D4 4.2 TDI Quattro MXX Gearbox Housing Case is an original component from the Automatic transmission parts group, designed for advanced Audi quattro drivetrain systems. The robust OEM construction ensures proper support for internal transmission components, operational stability, and precise fitment to factory mounting points on the chassis.

Specifications and technical data

• SKU: 0BL300035JX-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 0BL300035JX
• Substitutable numbers: 0BL300035JX, 0BL 300 035 JX, 1091030006, 1091301038, 1091401038
• Category: Automatic Transmission Parts

Purpose and function of the gearbox housing

The gearbox housing in the Audi A8 D4 4.2 TDI Quattro plays a key structural role – it serves as a rigid body for the automatic transmission and the components responsible for transferring torque to the quattro drive system. It is responsible for:

• maintaining the precise geometry of shafts, gears, and multi-plate clutches,
• proper sealing of the transmission's working area,
• stable mounting of the transmission to the engine and chassis,
• dissipating heat from operating components.

Thanks to this, the automatic transmission system maintains proper operating standards, and gear shifts are smooth and predictable.

Advantages of using an original Audi housing

In the case of structurally advanced automatic transmissions, using a housing from the same Audi model family reduces the risk of assembly and operational issues. The most important benefits include:

• Factory fitment for the Audi A8 D4 4.2 TDI Quattro drivetrain, without the need for mounting modifications or additional component adjustments.
• Compatibility with factory internal automatic transmission components, which facilitates the transfer of the complete transmission interior into a verified housing.
• Consistency with the original Audi drivetrain line, which helps maintain predictable performance parameters and durability.

Such a solution is particularly beneficial for post-accident repairs, mechanical damage to the body, or when rebuilding a transmission using verified OEM components.

Product characteristics and condition

The presented housing belongs to the Automatic transmission parts group by Audi and comes from dismantling. This means it is a used component that may show signs of previous use, but it retains the structural functionality necessary for further use in the process of repairing or rebuilding a transmission.

In practice, such a housing is a good choice when:

• the original transmission body has cracked, deformed, or suffered damage to the mounting threads,
• it is necessary to replace the housing itself while retaining a functional transmission interior,
• you are looking for an economical solution based on OEM parts instead of uncertain replacements.

Selection support and technical aspects

Due to the specific nature of Audi automatic transmissions, it is worth verifying the compatibility of the housing with the specific drive version and vehicle year before purchase. Manufacturer markings and interchangeable numbers assigned to this reference are helpful in this regard – they allow you to confirm that the given housing will work with your set of gears and accessories.

If you are planning a comprehensive repair or upgrade of the drivetrain area in your Audi and need other elements from the same group, such as bodies, oil pans, or side covers, check the available parts in the Audi automatic transmission parts category.

Safe purchase of a used gearbox housing

When choosing a used gearbox housing, a conscious approach to assessing the condition of the element is crucial – especially in the area of mounts, mating surfaces, and bearing seats. It is worth knowing the typical mistakes made when purchasing used drivetrain components to avoid unnecessary costs and service downtime. Practical tips can be found in the article Buying used car parts • Most common mistakes when choosing tuning parts, which will help you better plan your investment in drivetrain components.