Considering an ECU remap for your BMW M5 5.0 V8 400hp? A Stage 1 remap can take this E39 - 1995 - 2003 petrol engine from 400 BHP to 430 BHP and from 500 Nm to 535 Nm of torque (naturally aspirated). This engine scores 3.5/10 for remap suitability. Get a free personalised quote from a trusted remap professional and find out exactly what your BMW M5 can achieve.
Comparisons are calculated from our own recorded Stage 1 figures.
The BMW M5 5.0 V8 400hp is a 5.0L naturally aspirated petrol engine producing 400 BHP and 500 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 430 BHP and 535 Nm — a gain of around 30 BHP (8%) and 35 Nm (7%).
This engine has limited remap suitability, though the available headroom is limited, so gains are modest compared to higher-output variants. The tuning headroom is classified as limited, based on the percentage gain available from the factory output.
Considerations: Naturally aspirated engine: gains are usually limited; results vary widely.. 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.
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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 before proceeding.
