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M47
1999–2007•4 cyl•Longitudinal•Aluminium / Cast iron
The BMW M47 is a 2.0-liter, inline-four diesel engine produced from 1998 to 2007. Known for combining low-end torque with excellent fuel efficiency, it powered several popular models like the E46 3-Series and E60 5-Series before being replaced by the N47 engine.
Features
- Engine Block & Design: Features a lightweight aluminum block and cylinder head. It is a straight-four layout with a double overhead camshaft (DOHC) and 16 valves.
- Fuel System: Early models used a high-pressure Bosch VP44 distributor pump, while later M47TU versions adopted more refined high-pressure Common Rail direct injection.
- Turbocharging: Equipped with a Variable Geometry Turbocharger (VGT), which optimizes boost pressure across the entire rev range for smooth power delivery.
- Air Intake: Features one swirl port and one tangential intake port per cylinder, improving air-fuel mixing and overall combustion efficiency.