Audi S5 8T Fuel Injection Rail Line Right O/S 4.2 Petrol CAUA 079133316R

Audi S5 8T Fuel Rail 4.2 Petrol CAUA is an original fuel supply system component designed for the V8 petrol engine in the Audi S5 8T model. Thanks to its factory origin from the Audi range, it ensures a proper fit for the engine unit and correct cooperation with the standard engine accessories.

Specifications and technical data

• SKU: 079133316R
• Mark: Audi
• Condition: Used
• OEM Part Number: 079133316R
• Substitutable numbers: 079133316R, 079 133 316 R, 079 906 036 C, 079133036
• Location on the vehicle: Right
• Fuel type: Petrol
• Part type: Fuel Rail (Ramp)
• Category: Additional Fuel Injection Parts

Purpose and Function of the Fuel Rail

The fuel rail in the 4.2 Petrol CAUA engine is responsible for evenly distributing fuel to the injectors, maintaining stable pressure, and ensuring the proper operation of the entire injection system. For high-performance engines, such as the V8 in the Audi S5 8T, a correctly selected fuel rail is crucial for engine smoothness, throttle response, and stability under load.

The presented fuel rail belongs to the Other Injection System Parts category, meaning it is a supplementary component to the main accessories, yet essential for correct fuel supply. Using the appropriate component reduces the risk of leaks, pressure drops, and engine starting problems.

Compatibility with 4.2 Petrol CAUA Engine

The fuel rail is designed to work with the petrol engine designated by the code CAUA, used in the Audi S5 8T. Its construction is adapted to the operating parameters of the V8 unit, including fuel flow characteristics and control system requirements. This ensures compatibility with the factory engine control unit maps and standard injectors.

The element's placement on the right side of the engine bay facilitates identification and installation in the vehicle. The precise geometric fit to the cylinder head and other injection system components allows for installation without the need for modifications or adaptations.

Technical Characteristics and Installation

The fuel rail is adapted for operation with petrol fuel, in accordance with the factory specifications of the CAUA unit. The construction ensures adequate rigidity, resistance to operating pressure, and the temperature present in the engine bay. The provided connections allow for the attachment of fuel lines and injectors according to the original system.

The item is a used part, meaning it has been previously installed but is still intended for use after proper verification and installation. In practice, this allows for an economical repair of the injection system while maintaining the vehicle manufacturer's original specifications.

Practical Application and Benefits of Replacement

Replacing the fuel rail in the Audi S5 8T is recommended in situations where there are problems with fuel pressure, leaks, or mechanical damage to the component. Using an original fuel rail from the same engine family allows for the restoration of correct engine operating parameters without the need for system modifications.

The main benefits of using the presented fuel rail include:

• maintaining the factory fuel supply characteristics in the V8 engine,
• a secure fit with the CAUA unit's accessories,
• the possibility of an economical injection system repair using used parts,
• reducing the risk of starting problems and uneven engine operation resulting from fuel rail damage.

Assistance with Selection and Related Content

If you are planning comprehensive service for your Audi's fuel system and are also interested in other fuel injection-related parts from this brand, check the available parts in the Other Audi Injection System Parts category.

In the context of operating premium cars and the differences in construction and servicing of various generations, an article describing the evolution of flagship Mercedes models, which also discusses the approach to selecting spare parts, may be a useful addition to your knowledge – you can find more information in the material Evolution of the Mercedes S-Class: From W140 to W222 – Innovations, Model Differences, and Mercedes Auto Parts Over the Years.