do88 BMW M3 (E90/E92/E93) DCT Transmission Oil Cooler

Ever since the first E30, the BMW M3 has enchanted enthusiasts around the world, and the E90 generation is no exception, widely considered the perfect combination of usability and performance. With its well-balanced chassis, thorough construction, and hefty S65 V8, it's almost the perfect base for a race car. But only almost, ascending fluid temperatures are one of the platform's few known issues, particularly on DKG/DCT cars driven hard. do88 analysed the reasons behind this and developed a genuine solution.

The result is a 217% larger core volume than the factory unit (2208cm³ versus 696cm³), a 178% greater active cooling area (3456cm² versus 1242cm²), and in real-world testing, an 18% lower oil temperature (74°C versus 90°C stock). A highly effective 18-row Bar & Plate cell core delivers genuinely more efficient heat transfer, and oil volume within the cooler increases by 110% (6.5dl versus 3.1dl). This is a drop-in installation, no modifications necessary to the connections, fitting together with OEM oil lines and brackets, and includes a revised air duct designed to work in conjunction with the larger cooler for optimum airflow and performance.

Works with: OEM oil lines and brackets, includes a revised air duct for optimum performance. Fits manual or DKG/DCT gearbox cars.

Why Choose This Transmission Oil Cooler

• 217% larger core volume than the factory unit
• 178% greater active cooling area for genuinely improved heat rejection
• 18% lower oil temperature past the cooler, independently tested
• 110% larger oil volume within the cooler itself
• Highly effective 18-row Bar & Plate cell core
• CNC-machined oil line connections, compatible with all OEM oil line versions
• Includes a revised air duct designed specifically for this larger cooler
• Drop-in installation, no modifications necessary

Compatibility

• BMW E90/E92/E93 M3 (2007-2013, S65B40/S65B44, DKG/DCT or manual gearbox)

Note: while this cooler fits manual gearbox cars if you'd like to replace the OEM part, manual cars don't suffer the same oil overheating issues as DCT models when driven hard, this upgrade is primarily aimed at DKG/DCT applications.