BMW 5 Series M 550D - 381hp Remap

The BMW 5 serie M 550D - 381hp is a 3.0L turbocharged diesel engine producing 381 BHP and 740 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 420 BHP and 800 Nm — a gain of around 39 BHP (10%) and 60 Nm (8%).

This engine has moderate remap suitability, with a balanced spread of gains across both power and torque — providing a noticeable improvement across the rev range. The tuning headroom is classified as limited, based on the percentage gain available from the factory output.

From a technical perspective, the ECU is typically a Bosch EDC17 (likely), and the transmission is many variants use zf 5/6-speed automatics (where fitted); manuals also exist. at this torque level, transmission and driveline servicing history becomes especially important..

Considerations: High tuned torque: check transmission torque capacity and service history.

All figures shown are typical estimates based on aggregated Stage 1 data for this engine variant. Actual results depend on vehicle condition, mileage, and the chosen tuning method. We recommend discussing your specific vehicle with a qualified remap professional.