BMW F80 M3 F82 M4 S55 Charge Air Cooler Intercooler Radiator 7846235

BMW F80 M3 F82 M4 S55 Charge Air Cooler Intercooler Radiator is an original forced induction system component, designed specifically for the S55 engine in M3 F80 and M4 F82 models. As part of the Intercoolers group, it is responsible for stabilizing the temperature of compressed air, which promotes consistent performance and safe engine operation. This used OEM component is a sensible choice for technical repairs or upgrades of the forced induction system in BMW M vehicles.

Specifications and technical data

• SKU: 7846235-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7846235
• Substitutable numbers: 7846235, 17517846235, 4802574, 17514802574
• Category: Intercoolers

Function and role in the S55 forced induction system

The intercooler in the S55 engine lowers the temperature of the air compressed by the turbochargers, which helps maintain stable boost pressure and reduces the risk of engine knocking. In practice, this translates into:

• more consistent power across a wide RPM range,
• better resistance to thermal loads during dynamic driving,
• more predictable throttle response in both track and road conditions.

For BMW M3 F80 and M4 F82 units, a properly functioning intercooler is crucial to maintain the factory parameters of the S55 engine and to limit power drops at high ambient temperatures.

Compatibility and fitment for BMW M3 F80 / M4 F82

The offered intercooler is designed for use in BMW M3 F80 and BMW M4 F82 models with the S55 engine, ensuring proper fitment with the factory intake and cooling system. Using an OEM part means:

• maintaining the original airflow geometry,
• correct positioning relative to intake hoses and mounts,
• consistency with the factory charge air temperature control strategy.

As a result, the replacement is a technically predictable process, without the need for modifying mounts or interfering with the vehicle's installation.

Characteristics of the used OEM component

The presented air cooler is a used component, which allows for lower repair costs while maintaining a design consistent with BMW's factory specifications. Compared to aftermarket replacements, the original intercooler offers:

• preservation of factory flow characteristics and resistance,
• consistency with other components of the forced induction system,
• suitability for repairs in accordance with manufacturer guidelines.

This solution is particularly beneficial for servicing cars driven dynamically, where the predictability of the forced induction system and compliance with factory specifications are important.

Why a functional intercooler is important for engine durability

A functional charge air cooling system has a direct impact on the engine's operating temperature and, consequently, its lifespan. An inefficient intercooler can lead to elevated temperatures in the combustion chamber, which accelerates the wear of engine components. It is worth learning more about the broader context of cooling systems in cars by reading the article: Engine cooling system – overheating, repair, and used radiators.

If you are planning a broader upgrade or service for an M-series car, you may also find the material on the specifics of BMW sports components helpful: BMW M Performance – differences between M and standard components, which explains where used BMW parts have practical applications.

Application in BMW M service and modifications

Replacing the air cooler in a BMW M3 F80 or M4 F82 is recommended in case of power loss under load, visible mechanical damage, or after front-end collisions. The used OEM element will work well for:

• standard repairs after mechanical damage,
• restoring a car to factory configuration after modifications,
• servicing intensively used vehicles where cost control is important.

If you are performing comprehensive maintenance on the forced induction or cooling system in your BMW M, it is worth simultaneously verifying the condition of other components in the same group by browsing the offer in the Intercoolers{data-blogs=category} category to ensure the consistency of the entire system.