Dinan Stage 2 Performance Engine Software - 2011-2015 BMW 135i/135is/335i/X1/X5/X6


PART# D900-31T

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The Dinan Team made a blistering fast software upgrade, using our years of experience tuning BMWs for the street as well as winning back-to-back Grand-AM DP Championships and the 2011 24 Hours of Daytona. Dinan Performance Software is so much more than just turning up the turbo boost. It is a fully re-tuned engine management program that maximizes power while keeping all the BMW factory safeguards in place. Protecting your BMW while giving the most performance is the definition of "Performance Without Sacrifice". Drivetrain and engine components are analyzed for strength then the program is tested on the dyno and in the real world for durability and drivability. Dinan matches the new car warranty coverage for up to 4 years or 50,000 miles including the possibility of consequential damages. The top speed governor is removed on Manual RWD vehicles only, enabling the BMW to achieve its full potential.


  • More Power: Max gains of +55 HP @ 3900 RPM and +74 lb-ft TRQ @ 3900 RPM
  • 50 State Emissions legal; CARB EO # D-176-39
  • Huge torque gains drastically improves acceleration
  • No hesitation between shifts
  • Downloads through the BMW diagnostic port, the same way BMW loads software
  • Top speed governor removed on manual RWD vehicles, you decided how fast you want to go. *The stock top speed governor is retained for automatic transmission vehicles.
  • Full Map Rescaling, for drivability from idle to wide open throttle and everywhere in between
  • Properly Returned Fuel Mixtures, to save you gas and protect your engine
  • Water Pump Speed Increased, to improve cooling
  • Retain all BMW factory engine damage safeguards


Dinan Point Value3
Emission Code1
Factory Rated HP300
Factory Rated Torque (lb-ft)300
Labor Time (Hours)0.5
Max HP Gain55 @ 3900 RPM
Max Torque (lb-ft) Gain74 @ 3900 RPM
Peak HP355 @ 5300 RPM
Peak HP Gain42 @ 5500 RPM
Peak Torque (lb-ft)401 @ 5300 RPM
Peak Torque (lb-ft) Gain72 @ 3500 RPM
Product TypeEngine Software
Part NumberD900-31T



This part is legal for sale and use on Emissions Controlled Vehicles, in all 50 states, when used in accordance with the manufacturers application guide because it has a California Air Resources Board (CARB) Executive Order (EO) number.

The following vehicles are considered Emissions Controlled Vehicles:

  • 1966 and newer U.S. manufactured California Certified vehicles
  • 1968 and newer U.S. manufactured Federally Certified vehicles
  • 1968 and newer Foreign manufactured vehicle



    *Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages.

    Some parts are not legal for use in California or other states with similar regulations.