CSF BMW M3 E90/E92/E93 Dual Pass Transmission Cooler

Transmission heat management matters just as much as engine cooling on a track-driven E9X M3, and the factory unit is a genuine limiting factor once you're pushing the car hard. CSF's Dual-Pass Transmission Cooler uses proven AC condenser technology, built around a 1-row, super-high-pressure 22mm wide, 11-channel microtube core - an upgrade from the OEM's 10-tube design - paired with a high-density, multi-louvered fin design offering 20% more surface area contact than stock.

The dual-pass core layout means the fluid passes through the cooler twice for genuinely more effective heat rejection, not just a larger surface area for its own sake. It's engineered as a true drop-in fit, accepting all OEM attaching components - oil-line connections, mounting brackets, and shroud/ducting - so there's no need to modify anything else in the process. A genuine must-have for fast road, track, or race use, keeping transmission fluid temperatures consistently in check during extended hard driving.

Works with: Both DCT (7-speed) and 6-speed manual transmissions - fits in the stock location without any clearance issues.

Why Choose This Transmission Cooler

• 11-channel microtube dual-pass core - genuine upgrade over the OEM 10-tube single-pass design
• 20% more surface area contact - high-density multi-louvered fin design
• True drop-in fit - accepts all OEM oil-line connections, mounting brackets, and ducting
• Fits both manual and DCT transmissions - one core design covers both drivetrains
• Consistent transmission temperatures under sustained hard driving - genuine track and race-proven upgrade
• Alternative to OEM part 17227521376

Compatibility

• BMW E90 M3 Sedan (2008-2013, S65, manual & DCT)
• BMW E92 M3 Coupe (2008-2013, S65, manual & DCT)
• BMW E93 M3 Convertible (2008-2013, S65, manual & DCT)