Remapping, also known as ECU tuning, is the overwriting of an existing setting with new software to improve the vehicle’s performance. We remap a car by changing the manufacturer’s default settings and software on the ECU, replacing it with new software which can be tweaked and customized to your specifications. For example, it’s a common belief that remapping a vehicle has no effect on fuel economy, however, this technically isn’t true. As the result of ECU remapping, a car usually sees an increase in power, which can come at the expense of higher fuel consumption. Owners will often drive their cars more ‘enthusiastically’ after remapping, accelerating quicker when possible to enjoy the noticeable difference in output their car has, and therefore, further increasing fuel usage. On the other hand, if the driver chooses to change their driving habits to make the most of the increased power and torque throughout the ‘rev range’ and gear changes, then fuel economy can be improved. It really comes down to how the driver chooses to use the tuned car which decides how economical it becomes.