Buy BMW N55 Engines – High-Performance 3.0L Turbo
The BMW N55 is one of the most popular turbocharged inline-6 engines, known for its smooth power delivery, tunability, and reliability. It replaced the N54 and improved upon it with a single twin-scroll turbo, Valvetronic variable valve lift, and enhanced fuel efficiency—making it a favorite among BMW enthusiasts and tuners.
Whether you need a replacement engine for your 335i, 535i, X3, or X5, or you’re planning a performance build, the N55 delivers strong power (300–320 HP stock) with tuning potential up to 450+ HP.
BMW N55 Engine Specifications
Key Features:
- Engine Type: 3.0L Turbocharged Inline-6 (I6)
- Horsepower: 300–320 HP (varies by model/year)
- Torque: 300–332 lb-ft
- Turbocharger: Twin-scroll single turbo (Mitsubishi TD03)
- Fuel Injection: High-pressure direct injection (HPFP)
- Valvetrain: DOHC, Valvetronic variable valve lift
- Block Material: Aluminum with cast iron liners
- Redline: 7,000 RPM
Common Applications:
- BMW 335i (E90, F30)
- BMW 535i (F10)
- BMW X3 35i (F25)
- BMW X5 35i (F15)
- BMW 135i (E82, E88)
- BMW Z4 35i (E89)
N55 vs. N54: Which Is Better?
| Feature | N55 | N54 |
|---|---|---|
| Turbocharger | Single twin-scroll turbo | Twin turbos |
| Fuel System | High-pressure direct injection | Direct injection (more prone to HPFP issues) |
| Tuning Potential | 400–450 HP (safe limit) | 450–500+ HP (stronger internals) |
| Reliability | More refined, fewer fuel issues | More maintenance-heavy |
✔ N55 Wins For: Daily driving, smoother power delivery, better fuel economy.
✔ N54 Wins For: Max power potential (with modifications).
Why Buy a BMW N55 Engine From Us?
- Low-Mileage & Tested – Every N55 engine undergoes compression tests, leak-down checks, and inspection.
- Warranty Available – Optional extended coverage for peace of mind.
- OEM & Upgraded Options – Stock or built engines for performance builds.
- Fast US Shipping – Get your engine delivered quickly.
N55 Common Issues & Upgrades
Known Problems:
- Valve Cover & Gasket Leaks (common at 60k+ miles)
- Oil Filter Housing Gasket (OFHG) Leaks
- Water Pump & Thermostat Failure (~80k miles)
- Wastegate Rattle (earlier models)
Popular Upgrades:
- MHD or JB4 Tuning (350–400+ HP)
- Upgraded Turbo (Pure Stage 1/2) (450+ HP)
- Intercooler & Chargepipe Upgrade (prevents cracking)
- Catless Downpipe for Better Flow
Ready to Buy Your BMW N55 Engine?
Whether you need a stock replacement, a tuned N55, or a built motor, we have tested, low-mileage engines in stock.
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