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N55 Turbo Information
The N55 uses a BorgWarner B03 twin-scroll turbocharger. Below are the OEM turbo specifications.
N55 Turbo Variants
- PWG (Pneumatic Wastegate): E-Series & early F-Series (pre-07/2013)
- EWG (Electronic Wastegate): F-Series (post-07/2013) - Slightly larger turbo with electronic wastegate control
Turbo Specifications
OEM PWG Turbo (BorgWarner B03)
18539700001
Turbine Housing
0.61 A/R
Compressor Wheel
46/62 mm 6+6 Blade
Turbine Wheel
47.2/53 mm 9 Blade
Bearing Type
Journal Bearing
Wastegate
Internal (Pneumatic)
Scroll Type
Twin Scroll
OEM EWG Turbo (BorgWarner B03)
18539700005
Turbine Housing
0.61 A/R
Compressor Wheel
50/67 mm 6+6 Blade
Turbine Wheel
47.2/53 mm 9 Blade
Bearing Type
Journal Bearing
Wastegate
Internal (Electronic)
Scroll Type
Twin Scroll