BMW 3 Series E90 E92 E93 M3 LCI Expansion Tank Radiator Petrol 2283500

The BMW 3 Series E90 E92 E93 M3 LCI Expansion Tank Radiator is an original cooling system component designed for petrol versions, specifically engineered for the facelifted M3 3 Series models. As part of the Expansion Tanks group, it ensures stable cooling system operation, proper coolant volume compensation, and safe pressure relief. This used OEM component is a sensible choice for vehicle maintenance when you require factory-fitment and predictable component performance.

Specifications and technical data

• SKU: 2283500
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 2283500
• Substitutable numbers: 17112283500, 2283500, AS
• Fuel type: Petrol
• Category: Expansion & Overflow Tanks

Purpose and function in the cooling system

This expansion tank operates within the M3 petrol engine cooling system, stabilizing pressure and allowing for coolant level monitoring. It is responsible for:

• compensating for coolant volume changes at different operating temperatures,
• maintaining proper system pressure,
• safely discharging excess fluid during pressure spikes,
• easy monitoring of fluid levels during operation.

By maintaining the original geometry and connections, the tank works seamlessly with factory hoses and cooling system accessories, facilitating installation and subsequent maintenance.

Compatibility with BMW 3 Series M3 LCI

The BMW 3 Series E90 E92 E93 M3 LCI Expansion Tank Radiator has been designed with the specific cooling system of the facelifted M3 version in mind. This ensures compatibility with:

• the engine bay architecture of E90, E92, and E93 M3 LCI models,
• the layout of cooling hoses and mounting points,
• the temperature and pressure requirements of M3 petrol units.

Choosing a used, original expansion tank helps maintain factory cooling system performance parameters, which is crucial during dynamic driving and high thermal engine loads.

Condition, functional advantages, and installation

The offered item is in used condition, which in practice means it has been removed from a vehicle and is intended for further use after proper installation. Compared to aftermarket replacements, using an original expansion tank provides:

• factory-fitment to the cooling system without the need for modifications,
• preservation of the operating characteristics intended by the manufacturer,
• consistency with other system components (radiator, hoses, connectors).

Installation follows the typical procedure for this group of components: after draining the cooling system, removing the old tank, and transferring necessary accessories, the new tank is installed at the factory mounting points, and the system is bled according to the service procedure.

Why choose an original BMW expansion tank

For demanding M3 petrol units, maintaining a stable operating temperature is key. Choosing an original expansion tank from this series is a way to:

• maintain predictable cooling system behavior under high load,
• reduce the risk of leaks resulting from poor fitment,
• maintain technical consistency with other OEM components.

Expansion tanks are consumable parts that can wear out over time, so if you notice symptoms such as coolant loss or signs of leaks, it is worth considering a replacement with a verified, original component.

If you are planning a comprehensive repair or upgrade of your BMW's cooling system and need other items from the same group, such as additional tanks, mounting hardware, or related hoses, check out the available parts in the BMW Expansion Tanks category.

Additional technical information and service knowledge

When working with the cooling system, it is worth paying attention to the general condition of the engine, its accessories, and typical critical points for both diesel and petrol units of various brands. If you are interested in a broader perspective on issues related to engine refurbishment, operating culture, and restoring performance, an article describing a sample service plan for the V6 CDI engine may be helpful – you can find it here: The second life of the Mercedes OM642 engine – how injectors and a turbocharger restore the power of the 3.0 V6 CDI.