BMW N55B30 Engine – 335i / 135i (Low Mileage OEM Assembly)

This is a BMW N55B30 3.0L turbocharged inline-6 engine used in the BMW 335i and BMW 135i.

It’s a modern single twin-scroll turbo engine designed to replace the older N54, offering improved reliability, smoother power delivery, and better efficiency.

This listing is for a complete OEM engine assembly, typically used for engine swaps, replacements, or rebuild projects.

 Key Specifications

• Engine Code: N55B30
• Configuration: Inline-6, turbocharged
• Displacement: 3.0L
• Fuel System: Direct injection
• Turbo: Single twin-scroll turbocharger
• Drive Layout: RWD / AWD compatible (variant dependent)

 Performance Overview

• Smooth and linear power delivery
• Strong mid-range torque
• Stock output around 300–320 hp (varies by model)
• Excellent tuning potential (common upgrades push 400+ hp)

 Why the N55 Is Popular

• More refined than the older N54 platform
• Improved thermal management and reliability
• Widely used across multiple BMW models
• Strong aftermarket and swap support

 Vehicle Fitment

Common donor vehicles include:

• BMW 335i
• BMW 135i
• BMW 1 Series (select trims)

 What’s Typically Included

• Complete long block (block + head)
• Turbo system (integrated)
• Basic engine accessories (varies by seller)
• OEM factory assembly