Intercooler BMW F82 M4 S55 Competition Charge Air Cooler Reservoir 7846235

Intercooler BMW F82 M4 S55 Competition Charge Air Cooler Reservoir is an element from the Intercoolers group, designed for efficient reduction of intake air temperature in the S55 unit. The original BMW design ensures stable engine operating parameters, which translates into repeatable power and safe operation during dynamic driving.

Specifications and technical data

• SKU: 7846235-3
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7846235
• Substitutable numbers: 17517846235, 7846235, 17514802574, 4802574
• Category: Intercoolers

Purpose and function in the forced induction system

The presented liquid intercooler plays a key role in the S55 engine's forced induction system, responsible for intensive cooling of compressed air before it is delivered to the intake manifold. Lowering the air charge temperature improves mixture density, which supports stable operation of the power unit across a wide range of loads, especially in sport modes and during prolonged track use.

The charge air cooler solution with a separate coolant reservoir allows for precise management of intake air temperature, limiting power drop phenomena at high ambient temperatures. As a result, the system maintains performance repeatability, and the engine control unit does not have to aggressively reduce ignition timing or boost pressure.

Construction and design advantages

The intercooler was developed as an OEM BMW component, which means full compatibility with the factory intake air cooling architecture in the F82 M4. The liquid-based design allows for compact placement of the heat exchanger in the engine bay while maintaining high heat exchange efficiency and optimized airflow.

The main design advantages include:

• factory fitment for the intake system and cooling installation in the M4 Competition,
• BMW-engineered flow channels minimizing pressure drops,
• integration with the coolant reservoir for the charge air cooler system,
• compatibility with stock accessories and engine bay mounts.

Thanks to this, the installation process is straightforward, without the need for system modifications or the use of adapters, and the entire system retains its factory operating characteristics.

Condition, origin, and service application

The offered element comes from the original BMW parts line and is classified as a used OEM component. This type of solution is often chosen for professional forced induction system repairs when the priority is maintaining factory specifications while optimizing costs compared to a new subassembly.

The intercooler will perform well both during a standard replacement of a damaged heat exchanger and when upgrading the intake air cooling system in vehicles used intensively. Using an original part allows for maintaining compliance with engine control maps and factory thermal protection strategies of the S55 unit.

Benefits of using an original intercooler

Choosing an original intercooler for the BMW F82 M4 brings a number of practical service and operational benefits:

• stable intake air temperature under repeatable loads,
• retention of factory power and torque characteristics,
• full integration with the stock cooling system and engine management,
• reduction of diagnostic error risks resulting from non-original solutions.

For users who want to better understand the impact of an efficient cooling system on engine durability, the following article will be helpful: Engine cooling system – overheating, repair, and used radiators. It provides a broader perspective on the relationship between operating temperature and engine lifespan, also in the context of BMW models.

Related elements from the BMW Intercoolers category

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other elements from the same group, such as additional heat exchangers, charge air cooling system hoses, or reservoirs for the charge air cooler system, check out the available parts in the BMW Intercoolers category.