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 |
Shipping: In-stock orders placed before 3 PM EST ship the same day, and everything else ships within 24 hours. Standard, expedited, and overnight options are available at checkout. Backordered items ship as soon as we get them back in stock. Contact us for lead times. See the full Shipping Policy.
Returns: 30-day returns on new, unused items in original packaging. See the full Refund Policy.
