Considering an ECU remap for your BMW M3 4.0 V8 - 420hp? A Stage 1 remap can take this E90 - 2005 - 2011 petrol engine from 420 BHP to 440 BHP and from 400 Nm to 430 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 M3 can achieve.
Comparisons are calculated from our own recorded Stage 1 figures.
The BMW M3 4.0 V8 - 420hp is a 4.0L naturally aspirated petrol engine producing 420 BHP and 400 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 440 BHP and 430 Nm — a gain of around 20 BHP (5%) and 30 Nm (8%).
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.
From a technical perspective, the transmission is many variants use zf 5/6-speed automatics (where fitted); manuals also exist..
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.
