Engine Overview
Engine Overview — M54B30
Section titled “Engine Overview — M54B30”The M54B30 is a 3.0-liter naturally aspirated inline-6 producing 225 hp and 214 lb-ft of torque. It’s widely regarded as one of BMW’s best engines.
Key Specifications
Section titled “Key Specifications”| Specification | Value |
|---|---|
| Code | M54B30 |
| Configuration | Inline-6, DOHC, 24-valve |
| Displacement | 2,979 cc |
| Bore x Stroke | 84.0 x 89.6 mm |
| Compression | 10.2:1 |
| Power | 225 hp @ 5,900 RPM |
| Torque | 214 lb-ft @ 3,500 RPM |
| Redline | 6,500 RPM |
| Variable valve timing | Dual VANOS (intake + exhaust) |
| Engine management | Siemens MS 43 DME |
| Fuel requirement | Premium 91+ AKI |
| Oil capacity | 6.5 liters with filter |
Engine Systems
Section titled “Engine Systems”- VANOS: Variable valve timing for both intake and exhaust cams
- DISA: Variable-length intake manifold for broad torque curve
- EWS: Electronic immobilizer integrated with DME
- CCV: Crankcase ventilation system (PCV equivalent)
- Secondary air: Emissions system for cold-start catalyst heating
Reliability
Section titled “Reliability”The M54 is exceptionally reliable when properly maintained. The most critical maintenance item is the cooling system — see the Cooling section for details.