- Basic Specifications
- 3.0L turbocharged inline-6 engine with 302-365hp output
- First introduced in 2009 BMW 335i with 302hp
- Considered BMW's first reliable turbocharged engine
- Won three consecutive Ward's 10 Best Engines awards
- Technical Features
- Uses twin-scroll turbocharger design for improved efficiency
- Features Valvetronic variable valve lift system
- Electronic wastegate introduced in 2013
- Can handle up to 550whp on stock block
- Variants
- N55B30M0: Most common variant with 302hp
- N55B30O0: Performance-focused version with forged crankshaft
- N55B30T0: Top-of-the-line variant for M2
- All variants received updates with forged parts from S55 engine
- Maintenance and Reliability
- Can last up to 200,000 miles with proper maintenance
- Common issues include oil filter and valve cover leaks
- Stock turbo can handle up to 25-26psi boost
- Less modifiable than N54 but still capable of high power