Skip to content
Enjoy Free Shipping Over $500* (Some exclusions apply)
Enjoy Free Shipping Over $500* (Some exclusions apply)


CSF N54/N55/S65 Race Spec Transmission Cooler

by CSF
Original price $599.99 - Original price $599.99
Original price
$599.99 - $599.99
Sale price $599.99


  • Made 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 vs. OEM 10 Tube Design
  • High-Density Multi-Louvered Fin Design with 20% More Surface Area Contact Compared to OEM Unit
  • “Drop-In Fit” Requiring No Modifications to Install ­– Accepts All Attaching OEM Components Including Oil-Line Connections, Mounting Brackets and Shroud/Ducting
  • Lab Tested at ~30% More Efficient than OEM Cooler
  • World’s 1st True “Plug-and-Play” Transmission Cooler for the E9X M3 Platform
  • OEM #: 17227521376 



Year Model Sub-Model Chasis Code Engine Code
06-13 135i Convertible E88 N55
06-13 135i Coupe E82 N55
06-13 M Coupe Coupe E82 N54T
06-11 335i(xi) Sedan E90 N54
07-11 335i(xi) Sedan E90 N55
06-11 M3 Sedan E90 S65
06-12 335i(xi) Touring E91 N54
05-10 335i(xi) Coupe E92 N54
08-13 335(xi) Coupe E92 N55
05-13 M3 Coupe E92 S65
05-10 335i Convertible E93 N54
08-13 335i Convertible E93 N55
08-13 335is Convertible E93 N54T
05-13 M3 Convertible E93 S65
09-15 X1 35iX SUV E84 N55