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Dinan Stage 3 Performance Engine Software - 2004-2006 BMW 545i


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Stage 3 Performance Engine Software has been tuned specifically for use with Dinan's High Flow Intake and Throttle Body optimizing power output as well as improving drivability. The software safely raises the rev-limiter by 250 RPM enabling you to carry more road speed in each gear as well as optimize shift points. The top speed governor has been removed enabling the cars to reach their "natural" top speed. Revised EML tuning provides improved drivability by speeding up throttle response.


  • More Power (with intake and throttle body): Max gains of +23 HP and +17 lb-ft TRQ
  • 50 State Emissions legal; CARB EO # D-176-35
  • 250 RPM rev-limit increase
  • Improved throttle response
  • Top speed governor removed
  • Smooth and predictable power delivery

About Dinan

Dinan knows European marques – quite literally – from the inside out. Whether you need hard parts such as exhaust systems or coilovers, or ECU upgrades to unlock your engine's potential, Dinan has the parts to take your BMW, Mercedes-Benz, or Mini to the next level.

Brand Dinan
Dinan Point Value3
Emission Code1
Factory Rated HP325
Factory Rated Torque (lb-ft)330
Labor Time (Hours)0.5
Max HP Gain23
Max Torque (lb-ft) Gain17
Product TypeEngine Software
Required ItemsDinan Cold Air Intake (NLA) and Throttle Body (D760-3600A)
Part NumberD903-4553

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
Dinan High Flow Cold Air Intake and Throttle Body are required in order to run the Stage 3 Performance Engine Software.

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

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