Audi A4 B8 A5 8T Q5 8R Bare Engine CSUB 2.0 TDI 136HP 99k miles, WARRANTY

Warranty and technical condition of the part

The engine is sold with a 90-day warranty.

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

Listing details

The offer applies to a bare engine.

The engine is sold without accessories (e.g. alternator, starter motor, manifolds, injectors, turbocharger, etc.).

Audi A4 B8 A5 8T Q5 8R Bare Engine CSUB 2.0 TDI 136HP 99k miles, WARRANTY is a used, structurally complete bare engine block, stripped of accessories, designed for diesel units in popular Audi models. This is a solution for users and workshops that want to perform a controlled transfer of accessories from an old engine while maintaining high mounting compatibility and predictable operating parameters. This allows for the efficient restoration of the powertrain's performance, optimizing repair costs and vehicle downtime.

Specifications and technical data

• SKU: 04L100031P
• Mark: Audi
• Condition: Used
• OEM Part Number: 04L100031P
• Substitutable numbers: 04L100031P, 04L 100 031 P
• Fuel type: Diesel
• Part type: Engine Long Block
• Category: Engines
• Engine code: CSUB
• Mileage: 99 000

Technical characteristics of the CSUB 2.0 TDI bare engine

The presented bare engine belongs to the Engines category and is intended for the diesel unit with the CSUB code, used in Audi A4 B8, A5 8T, and Q5 8R models. The design, based on a modern four-cylinder TDI engine, ensures good refinement, appropriate flexibility, and favorable fuel consumption in daily operation. The use of turbocharging in this engine family allows for 136 HP of power while maintaining reasonable mechanical loads, which promotes the durability of the block, crankshaft, and piston-connecting rod assembly.

A bare engine means that the key mechanical components – block, cylinder head, crankshaft – serve as a base for further assembly with accessories from the previously operated engine. This repair method allows for the retention of the vehicle's original equipment (e.g., fuel system, turbocharger, manifolds) while refreshing the most important part of the powertrain.

Application in Audi A4 B8, A5 8T, and Q5 8R models

The CSUB 2.0 TDI 136HP bare engine version is designed for installation in popular Audi mid-size and SUV models, making it a practical choice for both private users and professional service centers. The use of the same engine family in the A4 B8, A5 8T, and Q5 8R facilitates the selection of the appropriate engine in terms of mounts, connections to the drivetrain, and compatibility with the vehicle's factory electronics.

In practice, this means that with proper verification of the engine code and compliance with vehicle documentation, a predictable replacement process can be prepared, limiting the risk of needing mechanical modifications. For workshops specializing in the Audi brand, this is a convenient base for performing major repairs and engine replacements based on the proven TDI design.

Condition, mileage, and benefits of installing a used engine

The offered engine comes from the secondary market, which allows for a significant reduction in repair costs compared to a brand-new unit. The declared mileage allows for an initial assessment of the wear level, and thus better planning of further service work, such as replacing seals, checking the cylinder head, or verifying the timing system before installation in the vehicle. For many users, this is a reasonable compromise between price and expected durability.

Choosing a used engine is particularly beneficial in situations where the previous engine has suffered a major mechanical failure (e.g., damage to the block or crankshaft), but the accessories remain in a condition suitable for further use. Transferring functional components onto a solid base in the form of a bare engine allows for the restoration of full vehicle functionality while maintaining control over the repair budget.

Selection by engine code and Diesel fuel

The CSUB unit belongs to modern Audi diesel engines powered by Diesel fuel, which is important both when selecting the appropriate engine oil and when planning further service maintenance. It is always crucial to confirm the compatibility of the engine code with the vehicle documentation and the rating plate to avoid problems with installation and integration with the control electronics.

Before purchasing, it is worth consulting with a mechanic or technical advisor who will verify the compatibility of the engine code, fuel type, and engine generation with the specific Audi A4 B8, A5 8T, or Q5 8R unit. This approach minimizes the risk of error and allows for the preparation of a list of accessories to be transferred or potentially replaced as a preventive measure.

Expert support and additional information

To better understand how to safely and consciously choose used power units, it is worth reading an expert guide discussing facts and myths about the secondary market, procedures for selection by VIN and OEM numbers, and real repair cost proportions – this is described in detail in the article Why it is worth buying used gearboxes and engines – facts instead of myths. This is a practical addition to the knowledge for workshops and individual customers planning an engine replacement.

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 power units, check the available parts in the Audi Engines category.