OVERVIEW
CSF's dual-pass cooler was the world's first true plug-and-play transmission cooler for the E9X M3 platform. It is built with CSF's AC condenser technology around a 1-row super-high-pressure 22mm wide 11-channel microtube, giving a dual-pass core with 11 cooling tubes against the OEM's 10-tube single-pass design.
The high-density multi-louvered fin adds 20% more surface area contact than the factory unit, and the cooler lab tests around 30% more efficient than OEM. It is a drop-in fit that accepts every OEM attaching component — oil-line connections, mounting brackets and shroud/ducting. On DCT cars it serves as the transmission cooler; on 6-speed manual cars the same unit is the engine oil cooler.
SPECS
- Built with CSF's AC condenser technology using a 1-row super-high-pressure 22mm wide 11-channel microtube
- Dual-pass high-performance core with 11 cooling tubes versus the OEM 10-tube design
- High-density multi-louvered fin design with 20% more surface area contact than the OEM unit
- Lab tested at approximately 30% more efficient than the OEM cooler
- Serves as the transmission oil cooler on DCT cars and the engine oil cooler on 6-speed manual cars
- Drop-in fit requiring no modifications — accepts all attaching OEM components including oil-line connections, mounting brackets and shroud/ducting
- Replaces OEM part number 17227521376
- 2-year warranty to the original purchaser under normal use
PARTS INCLUDED
- CSF dual-pass transmission / oil cooler
- Complete kit as supplied by CSF Radiators; see the installation instructions for the full bill of materials
TECH RESOURCES
Additional Parts Required
- None. CSF Radiators specifies no additional hardware for this part — it is a drop-in fit that reuses the OEM oil lines, brackets and ducting.
Installation
- CSF does not publish a downloadable installation PDF for this part. Printed installation instructions ship in the box.
Notes
- DCT cars run this unit as the transmission cooler; 6-speed manual cars run the same part as the engine oil cooler. Confirm fitment with Speed Logic if you are unsure which position applies to your car.
PART NUMBER
- 8042
VEHICLE APPLICATIONS
| Make / Model | Chassis | Engine | Years |
|---|---|---|---|
| BMW M3 Sedan | E90 | S65 4.0L V8 | 2008–2012 |
| BMW M3 Coupe | E92 | S65 4.0L V8 | 2008–2013 |
| BMW M3 Convertible | E93 | S65 4.0L V8 | 2008–2013 |
| BMW 335i / 335xi Sedan (incl. xDrive) | E90 | 3.0L Turbo I6 | 2007–2011 |
| BMW 335i Coupe (incl. xDrive) | E92 | 3.0L Turbo I6 | 2012–2013 |
| BMW 335is Coupe | E92 | 3.0L Turbo I6 | 2011–2013 |
| BMW X1 xDrive35i | E84 | 3.0L Turbo I6 | 2013–2015 |