Dinan Performance Engine Software Kit for BMW 540i and Sport Wagon E39 1999-2003 (DIY)


Dinan Engine Software safely raises the rev-limit by 240 rpm, endowing your car with a broader power band and greater road speed in each gear. The software also removes the top speed governor, which enables the cars to attain their ''natural'' top speed. Reprogramming of the drive by wire throttle system speeds up throttle response, dramatically reducing the delayed response to throttle inputs exhibited with the stock programming.


When ordering please ensure you have your VIN ready for the checkout process. It is crucial that it is typed in accurately and completely at that time.

While we offer the DIY kits in the stage 1 form, the additional stages will need to be purchased and installed at an authorized dealer as they require hard parts to function properly. 

*Dyno results when combined with a K&N free flow air filter (available at additional cost).

Special Note: Only for 1999 - 2003 models. 


  • 1997-2003 BMW 540i & Sport Wagon E39 
  • 1999-2003 BMW 540i Sedan
  • 1999-2003 BMW 540i Wagon
Product Specifications:
Labor Hours/Installation Hours 0.50
Emission Status 50 State Emissions Legal
Max HP Gain 9 @ 4500 RPM
Max Torque Gain 11 @ 2000 RPM
Included Notes OBD2 to Serial Adapter, Serial to USB adapter and Serial Cable.
Required Items Windows 7 or newer Laptop with a USB connector and an internet connection.