Audi A4 B9 A5 F5 Complete Engine DEUA 2.0 35 TDI Diesel 150HP 99k, WARRANTY

Warranty and technical condition of the part

The engine is sold with a 90-day warranty.

The warranty covers the engine itself; engine accessories are covered by a 30-day warranty.

The power unit was tested before removal and is in full working order.

Listing details

The offer applies to a complete engine.

The engine comes from a right-hand drive (RHD) vehicle. The wiring harness is not compatible with left-hand drive (LHD) vehicles and requires replacement or modification.

Audi A4 B9 A5 F5 Complete Engine DEUA 2.0 35 TDI Diesel 150HP 99k, WARRANTY is a complete powertrain from the TDI family, designed for modern mid-size Audi models. The unit with the DEUA code provides an efficient, economical, and dynamic power source for diesel vehicles, serving as a solid foundation for professional repair or replacement. Thanks to Audi's factory design, the engine maintains full compatibility with the vehicle's original architecture.

Specifications and technical data

• SKU: 04L100091S-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 04L100091S
• Substitutable numbers: 04L100091S, 04L 100 091 S, 04L100091SX, 04L 100 091 SX
• Fuel type: Diesel
• Number of cylinders: 4
• Part type: Complete Assembly
• Category: Engines
• Engine code: DEUA
• Mileage: 99 000

Purpose and characteristics of the DEUA unit

The presented engine belongs to the Engines category and was designed specifically for Audi A4 B9 generation and Audi A5 F5 generation models in the 35 TDI version. The diesel construction from the TDI family is optimized for low fuel consumption, stable operation under full load, and good refinement in daily use.

The DEUA unit is a modern diesel engine with an optimized combustion chamber geometry and precise injection control, which translates into efficient 150 HP power delivery and effective torque utilization in typical road conditions. The engine was built for premium class cars, where both dynamics and predictable throttle response are essential.

Technical construction and operating parameters

The DEUA engine is a four-cylinder diesel unit that uses a fuel system adapted for diesel fuel. The use of four cylinders in an inline configuration provides a favorable compromise between weight, dimensions, and smoothness of operation, which is important for both driving comfort and the load on other powertrain components.

The diesel nature of the unit allows for good torque delivery in the low and medium RPM range, which is particularly important in cars used in urban and extra-urban traffic. The engine has been designed to work with Audi's factory control systems, maintaining compatibility with the vehicle's electronics and factory control maps.

Application in Audi A4 B9 and A5 F5

This complete powertrain is intended for installation in Audi A4 B9 and Audi A5 F5 models in the 35 TDI version, where compliance with the DEUA engine code is required. By maintaining the original mounting architecture, the engine allows for restoring the factory powertrain configuration without the need for structural modifications in the engine bay.

The engine is suitable both for standard replacement of a damaged unit and for comprehensive rebuilding of the vehicle's powertrain zone. The unit's mileage allows for an assessment of its service history and the planning of any necessary maintenance after installation, in accordance with procedures used in professional workshops.

Condition, origin, and benefits of choosing a used engine

The offered engine comes from the Audi brand and is a used item, which allows for a significant reduction in repair costs compared to a brand-new unit. With proper selection based on the engine code and reference numbers, you can achieve a high level of installation compatibility with the existing vehicle setup while maintaining the cost-effectiveness of the entire service operation.

For workshops and end-users, choosing a complete, used diesel engine is often the most rational cost-effective solution, especially in cases of severe damage to the previous unit. Proper verification of parameters, such as fuel type, number of cylinders, or engine code, minimizes the risk of incompatibility and speeds up the installation process.

Selection, installation, and technical support

When selecting this unit for a specific Audi A4 B9 or A5 F5, it is crucial to compare the engine code and technical parameters with the vehicle's documentation. Proper matching ensures the full functionality of onboard systems, such as engine management, safety systems, or comfort features that interact with the powertrain.

If you want to deepen your knowledge about the cost-effectiveness of purchasing used powertrains and gearboxes, selection procedures based on VIN and OEM numbers, and the real differences between new and used components, check out the article Why it is worth buying used gearboxes and engines – facts instead of myths. It is a practical compendium of knowledge useful for both workshops and conscious drivers.

Additionally, if you care about an organized approach to online shopping and want to learn proven parts verification procedures, it is worth reading the guide Safe purchase of used car parts online – a step-by-step guide, which discusses, among other things, component selection based on numbers and technical specifications.

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 blocks, cylinder heads, or complete powertrains, check out the available parts in the Audi Engines category.