BMW Cooling System Parts & Accessories for BMW E90 M3 S65 4.0L

BMW is well-known for its problematic cooling systems, which are often a catalyst for irreversible engine damage and a hefty repair bill. The coolant expansion tank, a crucial component responsible for holding hot engine coolant under high pressure, is a common cause of cooling system issues. Unfortunately, BMW chose to manufacture the factory E90 M3 expansion tank out of plastic. After years of exposure to high coolant temperatures, ambient engine bay heat, and chemical-rich antifreeze, the plastic degrades, eventually weakening enough to fail catastrophically.

With this issue in mind, our team of BMW enthusiasts engineered the ultimate cooling system upgrade for E90 M3 owners: a heavy-duty expansion tank built to last! Crafted from durable 5052 TIG-welded aluminum, this tank resists high temperatures and pressures without degrading over time. Unlike the fragile OEM plastic tank, Turner’s design eliminates the risk of cracking, leaking, or failure. Upgrade to our Heavy Duty Aluminum Expansion Tank Kit and say goodbye to expansion tank issues for good!

To guarantee exact fitment, the upgraded tank was designed using advanced 3D CAD modeling. All bungs, nipples, and fittings are precision-machined to ensure a secure seal with factory hose ends. Unlike other aftermarket options, this tank maintains the factory coolant capacity and includes our laser-cut logo plate at the top, providing an accurate fill level. Internal baffles are incorporated to prevent fluid cavitation, eliminating air pockets in the cooling system and avoiding false coolant level warnings during spirited driving.

Engineered for high-performance builds and daily drivers alike, this expansion tank boasts a premium wrinkle black powder coat finish for a clean "OEM+" aesthetic. This tough coating not only enhances appearance but also protects against corrosion for long-term durability. The kit includes a silicone overflow hose, a high-quality level sensor, and an OE expansion tank cap, offering a complete cooling system upgrade. Avoid the risks of the factory expansion tank—upgrade your E46 M3 today and drive with confidence!

Features & Benefits:

Durable 5052 TIG-Welded Aluminum Construction: Ensures long-term reliability and eliminates expansion tank failure.
Premium Wrinkle Black Powder Coat Finish: Offers an "OEM+" appearance while preventing corrosion.
Factory Coolant Capacity Retention: Maintains the same coolant level as the original design.
Laser-Cut Turner Logo Plate: Provides a clear and accurate fill level indicator.
Internal Baffles: Prevent the introduction of air pockets during high-performance driving.
Precision-Machined External Bungs and Fittings: Ensure a perfect fit for factory hose connections.
Kit Includes:

Turner Motorsport Aluminum Expansion Tank
Performance Silicone Coolant Overflow Hose
Expansion Tank Cap
Billet coolant bleeder screw
Coolant Level Sensor
Product Development:

Our Heavy Duty Aluminum Expansion Tank was designed, engineered, tested, and quality inspected by our Research & Development team. Our development process includes leading-edge product technology: FARO laser scanning for reverse engineering and quality inspection, SolidWorks 3D CAD modeling, rapid prototyping utilizing our in-house 3D printer, and rigorous long-term product testing.

Installation:

- Click HERE for Installation Instructions -

Do88 - BigPack BMW M3 E90/E92 DKG DCT offers a premium solution for BMW enthusiasts seeking optimal cooling performance for their high-performance M3 models. Designed specifically for the BMW M3 E90 and E92 equipped with the DKG/DCT transmission, this complete cooling package by Do88 provides significant improvements in engine and transmission temperatures, ensuring peak performance and reliability under extreme conditions. Ideal for both street and track applications, this package offers unparalleled benefits for any driver looking to enhance their BMW’s performance.

Key Features:

Comprehensive cooling solution designed for BMW M3 E90 and E92 models with DKG/DCT transmission Includes - M3 engine oil cooler, M3 DCT / DKG oil cooler, M3 power steering cooler, M3 radiator Significantly reduces heat levels, allowing for sustained performance in intense driving scenarios Direct-fit design for straightforward installation without extensive modifications Engineered to withstand high-performance demands for both street and track use The Do88 BigPack BMW M3 E90/E92 DKG DCT cooling kit is a top choice for enthusiasts and professional drivers who need reliable and robust performance. Designed with precision and superior materials, this package ensures your BMW M3 remains cool under pressure, making it an essential upgrade for any Turner Motorsport enthusiast aiming to achieve the ultimate driving experience.