Audi A4 B9 2.0 TDI 30 TDI Mild Hybrid Complete Engine DTNB 136HP 89k, 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 2.0 TDI 30 TDI Mild Hybrid Complete Engine DTNB 136HP 89k, WARRANTY is a complete powertrain unit from the TDI family, designed for modern mid-size Audi models. The engine belongs to a popular group of diesel designs with optimized refinement, ensuring economical yet dynamic driving. This is a solution for users looking for a proven, factory-spec powertrain for their Audi A4 B9.

Specifications and technical data

• SKU: 05L100031H-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 05L100031H
• Substitutable numbers: 05L100031H, 05L 100 031 H
• Fuel type: Diesel
• Number of cylinders: 4
• Category: Engines
• Engine code: DTNB
• Mileage: 89 000

Technical characteristics of the DTNB unit

The presented engine falls into the Engines category and is designed for use with diesel fuel. The four-cylinder design provides an optimal compromise between weight, efficiency, and durability, which translates into stable performance parameters in daily driving. The DTNB code identifies the specific version of the unit, which facilitates the selection of accessories, control systems, and other powertrain components.

The four-cylinder layout promotes even load distribution and predictable torque characteristics, which is particularly important in mid-size cars used both in city traffic and on longer routes. The use of diesel fuel allows for favorable fuel consumption while maintaining sufficient power reserves for overtaking and highway driving.

Application in Audi A4 B9 2.0 TDI 136HP

Audi A4 B9 2.0 TDI 30 TDI Mild Hybrid Complete Engine DTNB 136HP 89k, WARRANTY was designed as a powertrain for the modern B9 generation Audi A4 platform. The 136 HP output is typical for economical yet sufficiently dynamic fleet and private configurations, where operational stability, predictable performance, and reasonable maintenance costs are prioritized.

The engine in this configuration performs well in daily use, offering:

• smooth power delivery across a wide rev range,
• efficient use of diesel fuel,
• a balanced ratio of performance to maintenance costs.

Thanks to the assigned unit code, it is possible to precisely match it to the specific trim level and control software of the Audi A4 B9, which reduces the risk of compatibility issues during installation.

Condition, mileage, and installation suitability

The offered engine comes from the secondary market and is marked as used, which allows for significant repair cost savings compared to a brand-new unit. The declared mileage provides a good basis for further operation, provided proper maintenance is performed after installation. This type of complete powertrain unit is particularly useful in cases of major damage to the existing engine, such as mechanical failures or block issues.

Choosing a complete engine with the assigned DTNB code simplifies the repair process – the mechanic has a cohesive assembly at their disposal that can be matched to the vehicle's existing installation while maintaining factory performance characteristics. This solution often shortens vehicle downtime in the workshop and limits the number of additional parts requiring replacement.

Benefits of using an original Audi unit

The powertrain unit from the TDI family designed for the Audi A4 B9 was developed for long-term operation in diverse road conditions. Using an original engine with the correct code ensures:

• preservation of factory handling characteristics and throttle response,
• proper cooperation with the factory engine control unit software,
• easier diagnostics and service based on manufacturer documentation.

For users comparing different repair solutions, our guide discussing the choice between remanufacturing and salvaged parts may be helpful – more information can be found in the article Remanufactured or used original – which part to choose for repairs?.

Selection and additional technical information

When selecting this unit for a specific Audi A4 B9, it is crucial to verify the compatibility of the engine code and accessory configuration with the vehicle. In case of doubt, it is worth consulting a workshop specializing in the Audi brand, which will assess the scope of necessary installation work and any potential differences in equipment.

If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other components from the same group, such as blocks, cylinder heads, or complete powertrains, check the available parts in the Audi Engines category.

For a comparison of characteristics and potential problems of diesel units in other brands, the guide regarding popular BMW designs may also be helpful – a detailed discussion can be found in the article Troublesome BMW E90 engines: check what can ruin your budget!, which allows for a better understanding of the importance of proper selection and verification of the engine unit's condition before installation.