Audi A4 B9 Turbocharger Turbo Charger Housing 2.0 TDI Diesel Engine 04L253056H

Audi A4 B9 Turbocharger Turbo Charger Housing 2.0 TDI Diesel is a component from the Turbochargers and parts category, designed for the diesel engine forced induction system. It is responsible for the stable seating of the turbine core and proper exhaust gas flow, which directly impacts the engine's performance and operating culture.

Specifications and technical data

• SKU: 04L253056L-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 04L253056L
• Substitutable numbers: 04L253056L, 04L 253 056 L, 04L253056H, 04L 253 056 H
• Fuel type: Diesel
• Category: Turbos & Parts

Purpose and function in the forced induction system

The turbocharger housing in a 2.0 TDI Diesel engine plays a key role in managing exhaust gas flow and maintaining the correct rotor geometry. A properly selected part allows for maintaining factory boost parameters, reducing pressure drops, and ensuring stable turbine operation across the full load range. The correct housing is particularly important in diesel units, where operating pressures and temperatures are higher than in gasoline engines.

Benefits of using an original Audi housing

Using a housing from the Audi group ensures dimensional compatibility with the factory exhaust and intake system. This translates into:

• correct positioning of the turbine core relative to the manifold and exhaust system,
• maintaining connection tightness and reducing the risk of exhaust leaks,
• preserving the boost characteristics specified by the manufacturer.

For the user, this means stable performance, predictable throttle response, and a lower risk of additional stress on the engine and auxiliary equipment.

Technical characteristics and fitment

The turbocharger housing has been designed to work with a Diesel-powered engine unit. The construction is adapted to the operating conditions typical for TDI engines, such as high exhaust gas temperatures and significant thermal and mechanical loads. As a result, the component maintains appropriate rigidity and dimensional stability, which is essential for the precise guidance of gases within the turbine.

The product belongs to the Turbochargers and parts category, which facilitates the selection of other forced induction system components – such as the core, actuators, or lines – based on the same design group.

Condition of the item and service application

The offered housing is a used part, making it an attractive solution for service repairs when the goal is to restore the efficiency of the forced induction system at controlled costs. This type of part is particularly useful in situations where only the housing has been damaged, while the remaining turbine components remain in a condition suitable for further operation.

Before installation, it is recommended to perform a standard inspection of the mating surfaces, threads, and mounting sockets, as well as to verify compatibility with your specific turbine model based on the OEM number and interchangeable numbers available in the technical specification.

Selection by OEM number and purchase support

To precisely select the housing for a specific engine and turbine configuration, it is worth using the OEM number and reference numbers assigned to this part. If you have any doubts regarding fitment, a detailed guide describing the verification process using the VIN and catalog numbers will be helpful – you can find it in the article Guide: how to choose the right car part by VIN and OEM number, where the compatibility checking process and a list of questions to ask the seller are discussed step by step.

Expanding work within the forced induction system

If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other elements from the same group, such as turbine housings, mounting elements, or additional forced induction system components, check out the available parts in the Audi Turbochargers and parts category.