BMW F20/F21 M140i B58 ECU Remap

Developed and tested in house the MoreBHP Stage 1 remap is intended for vehicles with stock hardware.

Original Power  340 bhp
Remap Power  430 bhp
Original Torque  500 Nm (387 ftlb)
Remap Torque  650 Nm (479 ftlb)

List Price:  £599.00

Sale Price:  £499.00

Saving You:  £100.00 (17%)

BMW F20/F21 M140i B58 ECU Remap

To find out more or book your car in please call 01270 500123 or EMAIL YOUR DETAILS.

Developed for vehicles with modifications such as performance exhaust, air filter, bigger/front mount intercooler. Cat removal or DPF Removal (diesel).

Program written to suit each individual car's modifications.


To find out more or book your car in please call 01270 500123 or EMAIL YOUR DETAILS.

Available exclusively at MoreBHP Crewe HQ.

Intended for petrol or diesel cars that have been fitted with hybrid/larger turbos, possible larger injectors in addition to Stage 2 parts.

Each program is written in-house with development and testing on our state of the art 4WD rolling road.


To find out more or book your car in at More BHP HQ please call 01270 500123 or EMAIL YOUR DETAILS.

At MoreBHP HQ in Crewe we develop and test our remaps on a state of the art 1200bhp 4WD rolling road.

By adding a rolling road session to your Stage 1, Stage 2 or ECO remap you can see what power / torque your car makes both before and after the upgrade.

Using live diagnostics this allows us to custom tune the remap to your vehicle.

If booking at More BHP HQ in Crewe then this option is highly recommended.

Additional Price inc VAT:  4WD £75  2WD £50

To find out more or book your car in please call 01270 500123 or EMAIL YOUR DETAILS.

M140i Stage 1 Custom Remap at MoreBHP on the Rolling Road

The B58 engine found in the BMW M140i is a credit to the engineers at BMW, but they still left plenty of room for the engine to make more power and this can be exploited by remapping.

It took a while for tools to be developed to allow the MG1CS003 ECU in the M140i to be remapped so prior to that only a tuning box solution was available.

The tuning boxes did yield significant increases in power and torque but only by fooling important sensor signals for boost pressure and fuelling, etc.

With the ECU now unaware of how much boost it is actually running and how much torque is actually being produced this means some systems cannot work correctly including the traction control and the gearbox.  This can make power delivery too brutal and uncontrollable with rough gear changes.

When the ECU is remapped properly you can actually achieve much better results whilst running less boost thanks to a more efficient way of tuning. We tune in such a way that we make the ECU work for us, rather than against us.

The first M140i we remapped had previously been running a tuning box and the customer described the difference like "night and day". With the remap the car has substantially more power and torque and now has no throttle closures or ignition delay. It is extremely fast. This delivery is further helped by the 'torque by gear' settings we use which positively ramps available torque through the gears so reducing wheel spin in the lower gears. The gear changes from the auto box are now so much smoother and the car has become more of a pleasure to drive, perhaps safer too.

We recalibrate the IDrive Sports Displays in the M140i Remap

The sports displays on the I-Drive can now be recalibrated to show the new power and torque figures available. For offroad use we can enhance the exhaust notes in sport mode and allow the exhaust flaps to stay open. Cold start can be disabled, if required, to remove the loud start up.

We've managed to achieve 440+bhp and 650+Nm on a completely stock car with a Stage 1 Remap, many other tuners are struggling to achieve this with Stage 2.