BMW Engine Wiki
N2x, N55, S55, B58 & B4x Knowledge Base
Comprehensive technical resource for BMW's turbocharged engines. Find detailed specifications, modification guides, maintenance tips, and performance upgrade paths for the N20, N26, N55, S55, B58, B48, B46, and all their variants.
Disclaimer: This wiki is community-driven and provided for educational purposes only. Modification recommendations are general in nature. We cannot be held liable for any engine or vehicle damage caused by parts or modifications mentioned here. Always consult with qualified professionals before making modifications to your vehicle.
Engine Platforms
N20 & N26 Wiki
2011-2017
4-cylinder turbocharged engine found in various BMW models from 2011 to 2017. N26 is the SULEV variant for the USA market.
Common Models: F30 320i/328i, F10 520i/528i, F25 X3, F26 X4, and more
N55 Wiki
2009-2019
6-cylinder single turbocharged engine produced from 2009 to 2019. Uses a single twin-scroll turbo. Found in 335i, 535i, X5, and M2.
Common Models: E90/F30 335i, F10 535i, F25 X3, F87 M2, and more
S55 Wiki
2014-2020
6-cylinder twin turbocharged M engine produced from 2014 to 2020. High-performance variant with forged internals. Found in F80 M3, F82 M4, and M2 Competition.
Common Models: F80 M3, F82 M4, F83 M4, F87 M2 Competition/CS
B48 & B46 Wiki
2014-Present
4-cylinder turbocharged engine introduced in 2014, succeeding the N20. Includes B48TU, B48E (M-Lite), and B46 (USA SULEV) variants.
Common Models: G20 330i, G30 530i, G01 X3, F40 M135i, MINI Cooper S, and more
B58 Wiki
2015-Present
6-cylinder single turbocharged engine introduced in 2015, succeeding the N55. Includes B58TU (2018+) with upgraded internals and closed-deck block.
Common Models: G20 M340i, G30 540i, G01 X3 M40i, G29 Z4 M40i, A90 Supra, and more
Coming Soon
S58, N63, S63, N74
Additional engine platforms including BMW's high-performance S58, twin-turbo V8 N63/S63, and V12 N74 are currently in development.
Browse by Topic
Specifications
Detailed technical specifications including bore, stroke, compression ratios, and component materials.
Performance Upgrades
Upgrade guides with power figures, recommended modifications, and tuning considerations.
Fueling Data
HPFP, LPFP, and injector flow rate data for planning fueling upgrades and ethanol conversions.
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