Audi Volkswagen Seat Skoda Oil Filter Housing Cooler 2.0 TDI Diesel 03L115389C

Audi Volkswagen Seat Skoda Oil Filter Housing Cooler 2.0 TDI Diesel is a complete, used oil filter housing integrated with an oil cooler, designed for TDI diesel engines. This component is responsible for the stable mounting of the filter cartridge and efficient heat dissipation from the oil, which translates into safe engine operation and reduces the risk of overheating the lubrication system. This technical solution is dedicated to VAG group vehicles where durability and proper oil circulation in a diesel engine are essential.

Specifications and technical data

• SKU: 03L115389C-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 03L115389C
• Substitutable numbers: 03L115389C, 03L 115 389 C, 03L117021C, 03L 117 021 C
• Fuel type: Diesel
• Part type: Oil Filter
• Category: Oil Filters

Function and role of the oil filter housing with cooler

The oil filter housing integrated with a cooler in a TDI engine performs several key structural and operational functions. It ensures the sealed flow of oil through the filter cartridge while simultaneously directing it through a heat exchanger, where the oil transfers excess heat to the cooling system. As a result, the oil maintains stable viscosity parameters, which promotes even lubrication of moving parts and reduces engine wear during intensive operation.

In diesel units, where thermal loads are higher than in many gasoline engines, an efficient oil cooler has a direct impact on the service life of the turbocharger, bearings, and crankshaft. Using a dedicated housing with a cooler allows the oil to be kept within the optimal temperature range, which is particularly important during long-distance highway driving as well as in urban conditions with frequent engine warm-up and cool-down cycles.

Designed for TDI diesel engines

The presented housing has been designed to work with engines powered by Diesel fuel, characteristic of the TDI family in Audi, Volkswagen, Seat, and Skoda vehicles. The design of the lubrication system in these units assumes close cooperation between the filter housing and the oil cooler, which is why using the correct component is important for both proper oil pressure and the thermal stability of the entire system.

In practice, this means that when replacing a damaged housing or cooler, it is worth choosing a part that is structurally compatible with the manufacturer's original solution. This allows for maintaining factory oil flow parameters and avoids problems with leaks or improper venting of the lubrication system in a diesel engine.

Condition, origin, and advantages of using a used part

The offered oil filter housing with cooler is an aftermarket component sourced from dismantling. This type of part, properly verified before sale, represents a favorable compromise between repair costs and maintaining the original build quality characteristic of the Audi brand. In practice, the user receives a component factory-designed to operate in the demanding environment of a TDI engine, without the need to invest in more expensive replacements.

Choosing a used housing with an oil cooler also aligns with the idea of responsible vehicle maintenance – it reduces waste and allows for the effective reuse of parts that still perform their task. You can find more about the impact of using dismantled parts on the environment and a driver's budget in the article on circular economy and used car parts, which describes the practical benefits of this approach.

The importance of a functional oil cooler in the cooling system

The oil cooler integrated with the filter housing works with the engine cooling system, stabilizing the oil temperature during engine operation. A faulty heat exchanger can lead to oil overheating or excessive cooling, both of which negatively affect the protection of engine components. Therefore, in the event of symptoms such as a drop in oil pressure, leaks around the filter housing, or disturbing temperature fluctuations, it is worth considering replacing the entire housing-cooler assembly.

For drivers who want to better understand the relationship between the cooling system and engine durability, the guide on engine overheating and the role of radiators in protecting the unit will be useful, where, among other things, the impact of heat exchangers on engine life and the consequences of maintenance neglect are discussed.

Related items from the Audi Oil Filters group

If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other items from the same group, such as oil filter cartridges, filter bodies, or additional mounting elements, check the available parts in the Audi Oil Filters category.