The CSF Race-Spec Engine Oil Cooler is a true plug-and-play upgrade for the BMW N55 engine, using CSF's AC Condenser Technology with a 1-row super-high-pressure 26mm multi-channel microtube. Its innovative dual-core in-series system adds 5 rows of microtubes on the rear side for an approximate 40% increase in heat rejection, converting the unit to a single-pass design with a high-pressure return line for optimal flow. It directly replaces the factory cooler with no modifications, accepting all OEM oil-line connections, brackets, and ducting. Requires an additional half quart at fill-up (7.5 qt vs OEM 7).
| Type | Race-spec engine oil cooler (drop-in fit) |
| Core | Dual-core in-series, AC Condenser Tech 26mm microtube, +5 rows |
| Heat Rejection | ~40% increase vs OEM |
| Connections | OEM oil-line connections |
| Fill Capacity | 7.5 qt (vs OEM 7 qt) |
| Warranty | CSF Limited Warranty |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2012-2015 | BMW | 335i | Base |
| 2014-2016 | BMW | 335i GT xDrive | Base |
| 2012-2015 | BMW | 335i xDrive | Base |
| 2014-2016 | BMW | 435i | Base |
| 2015-2016 | BMW | 435i Gran Coupe | Base |
| 2014-2016 | BMW | 435i xDrive | Base |
| 2015-2016 | BMW | 435i xDrive Gran Coupe | Base |
| 2013-2015 | BMW | ActiveHybrid 3 | Base |
| 2014-2016 | BMW | M235i | Base |
| 2015-2016 | BMW | M235i xDrive | Base |
