ChiptuneMAP/BMW/7-serie/40i MHEV - 381ch
BMW

40i MHEV - 381ch Tuning

BMW 7-serie: detailed power and torque gains by stage.

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Gains by stage(4)

Power

381 hp

Torque

540 Nm

Petrol
Power
381→430hp
+49 hp
+13%
Torque
540→620Nm
+80 Nm
+15%
OriginalTuned

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Tuners · ChiptuneFILE

Stage 1 file for the 40i MHEV - 381ch

Send the ECU read, get back an optimised and tested file.

  • Stage 1, Stage 2, E85
  • Checksum corrected, original file kept
  • For professionals only
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Everything about 40i MHEV - 381ch tuning

Tuning the 40i MHEV - 381ch found in the BMW 7-serie is one of the most popular performance upgrades. This engine offers excellent potential for power and torque gains.

On ChiptuneMAP, find verified gain data for each stage, compare tuner prices and find the ideal professional for your project.

Gains summary by stage

On the BMW 7-serie 40i MHEV - 381ch, tuning delivers up to +89 hp and +140 Nm depending on the stage. Stock vs tuned figures:

StagePowerTorqueIndicative price
Stage 1381 → 430 hp540 → 620 NmOn quote
Stage 2381 → 470 hp540 → 680 NmOn quote
E85 Flexfuel381 → 381 hp540 → 540 NmOn quote
E85+381 → 430 hp540 → 620 NmOn quote

Frequently asked questions

What gains can I expect from tuning the 40i MHEV - 381ch?
Tuning the 40i MHEV - 381ch (BMW 7-serie) delivers significant power and torque gains depending on the chosen stage. Stage 1, with no hardware modifications, offers the best gain-to-reliability ratio.
Is tuning reliable on the 40i MHEV - 381ch?
Yes, the 40i MHEV - 381ch is known for its reliability when tuned, especially at Stage 1. It's essential to use a professional, experienced tuner with maps tailored to your engine.
How much does BMW 7-serie tuning cost?
Prices vary by stage and tuner. Check our directory to compare rates from professionals near you.
Should I get a tuning box or an ECU remap?
ECU remapping (modifying the engine control unit map) delivers better results and integration than a plug-in tuning box. It's customized for each engine.
How do I find a tuner for my BMW 7-serie?
Use the ChiptuneMAP directory to find a tuner near you. Compare prices, services and specialties.