Oil Filter Housing Audi A4 B8 A5 8T Q5 8R 2.0 TDI Engine Oil Cooler 03N115389H

The Audi A4 B8 A5 8T Q5 8R 2.0 TDI Engine Oil Cooler is an original part from the Oil Coolers and Hoses group, designed for the lubrication system in 2.0 TDI diesel engines. It ensures stable oil cooling and works in conjunction with the oil filter, which translates to safe engine operation and reduced risk of oil overheating under demanding driving conditions.

Specifications and technical data

• SKU: 03N115389H
• Mark: Audi
• Condition: Used
• OEM Part Number: 03N115389H
• Substitutable numbers: 03N115389H, 03N 115 389 H
• Category: Engine Oil Coolers & Lines

Purpose and Function in the Lubrication System

The oil filter cooler in Audi A4 B8, A5 8T, and Q5 8R models with a 2.0 TDI engine is responsible for heat exchange between the oil and the coolant, stabilizing oil temperature across a wide range of loads. A properly functioning heat exchanger limits oil degradation, helps maintain proper lubrication system pressure, and protects engine components from excessive wear.

Original Audi origin means factory flow parameters are maintained, perfect fit with the oil filter housing, and compatibility with the standard engine bay installation. This ensures predictable installation without the need for modifications to mounts or hoses.

Benefits of Using an Original Oil Filter Cooler

Using an original part in the oil cooling system brings tangible operational benefits:

• maintaining stable engine oil temperature in the 2.0 TDI engine during city and highway driving,
• reducing the risk of oil overheating under high engine load,
• preserving the factory operating characteristics of the lubrication system,
• guaranteed fit with the oil filter housing and standard cooling hoses.

For Audi owners, it's important that the original oil cooler works with factory sensors and control systems, which facilitates trouble-free diagnostics and maintains predictable engine performance parameters.

Condition, Verification, and Service Application

This part is from the used parts group, allowing for an economical repair of the oil cooling system while maintaining the original manufacturer's specifications. This type of component is particularly useful for:

• repairs after engine overheating,
• mechanical damage to the heat exchanger or its housing,
• lubrication system upgrades as part of service maintenance.

When selecting an oil filter cooler for a specific Audi A4 B8, A5 8T, or Q5 8R version with a 2.0 TDI engine, always consider the manufacturer's markings and engine configuration to ensure full assembly and functional compatibility.

Importance of a Functional Oil Cooling System

A functional oil cooling system directly impacts engine durability, especially in modern diesel engines. An inefficient oil cooler can lead to accelerated oil aging, a drop in its viscosity, and consequently, increased wear of cooperating components. Replacing a worn-out heat exchanger with a functional, original part is therefore an important element of service maintenance.

To better understand the connection between the cooling system and engine lifespan, it's worth reading the guide: Engine Cooling System – Overheating, Repair, and Used Coolers. The article discusses the impact of efficient cooling on engine condition and practical aspects of selecting used parts.

Expanding Service for Audi's Oil System

If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other parts from the same group, such as additional oil coolers, oil hoses, or connection elements, check the available parts in the Audi Oil Coolers and Hoses category.