Frequently asked questions

It is a modification of the engine ECU parameters to optimise performance: more power, more torque and, depending on use, better efficiency. At MTG Auto Sport, every map is developed specifically for your engine.

A Stage 1 carried out properly by a professional stays within the engine's safety margins. However, it is essential that the vehicle is in good mechanical condition before any modification: we check it with you before starting work.

Yes, remapping may affect the manufacturer's warranty, as it changes the vehicle's original parameters. The original file from your ECU is saved before any work is carried out and can be reinstalled.

Any change to a vehicle's original characteristics, such as its power output, must in principle be declared and may require its homologation to be updated. We explain what this means for your vehicle before any work is carried out.

Yes, we recommend informing your insurer of any engine modification, to avoid any problems in the event of a claim.

Most petrol engines can be converted, but some models require additional modifications. Contact us with your vehicle to check its compatibility.

We recommend checking the spark plugs and, if necessary, replacing them to ensure optimal combustion with E85.

It is not compulsory. Some drivers prefer to fill up with SP98 from time to time, as E85 is drier than conventional petrol, in order to protect the injection system.

The official homologation procedure ("FE" mention on the registration certificate) applies to approved add-on boxes. Conversion by remapping does not follow this procedure and has no equivalent official recognition. More details on our page E85 conversion.

Some used ECUs identified by their part numbers, Green air filters, tools and remapping software. Everything is available in our shop.

Compatibility is only guaranteed if the references of your original ECU are identical to those of the part (manufacturer reference and carmaker reference). If in doubt, send us a photo of your ECU's label.

Depending on the part number: as is, blank, Reset Full, Immo Off or cloning to the data of your original ECU. Only the services possible for each part are offered on its page.

It is an analysis of the vehicle's electronic systems to identify faults. It allows electrical and electronic problems to be detected quickly and avoids unnecessary repairs.

This means customising your vehicle's electronic functions: activating hidden features, adjusting the lights, instrument cluster settings and more. Most recent vehicles are compatible, but the available functions depend on the model and year.

Yes. With the File Service, you read your ECU and send us the file, which we then modify. You can also send us your ECU by post : we remap it and send it back to you.