Engine remapping is seen as a relatively low-cost way of tuning your car.

Though most remaps will focus on increasing your car’s power and performance, it’s also possible to improve your engine’s fuel efficiency with a remap.

Is a remap really worth the extra cash, though? This guide should help you decide.

What is engine remapping?

Engine remapping is when the car’s onboard computer (often called an Electronic Control Unit, or ECU) is modified with new software to affect its behaviour.

From the factory, the vast majority of cars won’t have their engine’s maximum potential performance on offer — even on sports cars. ECUs usually limit the engine’s performance to improve reliability, emissions and fuel consumption.