Serviced at intervals of every 1000 miles? It likely incurred more expenses in oil than on fuel!π
In response to your inquiry, no, it will not. You must first address the underlying issue causing the power problem. Any competent mapper will do diagnostics and refrain from mapping a vehicle with an underlying problem.
The next step is to conduct a diagnostic scan using BMW-specific software. Considering the vehicle's age and usage, it has likely been used mostly in urban settings, leading me to predict potential issues such as stuck turbo vanes or a clogged EGR system.