Dinan Performance Engine Software for BMW 540i and Sport Wagon E39 1997-1998


Dinan Performance Engine Software releases more power from your BMW 540i E39 by re-programming the fuel mixture and ignition timing parameters of the engine management system. The software safely raises the rev-limit, giving your BMW a broader power band and greater road speed potential in each gear. Significant gains are also achieved at part throttle, making extra power available where you spend the bulk of the time driving. A peak gain of 8 horsepower at 3500 rpm has been achieved at part throttle with the revised programming.

Special Note: 

Only for 1997 - 1998 models.


  • 1997-2003 BMW 540i & Sport Wagon E39 
Product Specifications:
Labor Hours/Installation Hours 0.50
Emission Status 50 State Emissions Legal
Max HP Gain 8 @ 3500 rpm
Max Torque Gain 13 lb/ft @ 2000 rpm
Included Notes Included Item Details