Dinan Stage 3 Performance Engine Software - 2007-2016 BMW 135i/335i/335is/535i/Z4


Part # D900-30TC Be the first to write a review
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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.

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Stage 3 Engine Software is for use with the Dinan Oil Cooler and Intercooler; optimizing performance and drivability from the combination. Dinan Stage 3 Performance Engine Software safely increases turbo-boost pressure, along with properly retuned fuel mixtures, ignition timing and full map rescaling to take full advantage of the High-Performance Intercooler and Oil Cooler. However, there is more to a tune than just cranking up the boost. Power needs to come on smoothly and in a predictable way to make the car as fun to drive at wide-open throttle as cruising around town. It is your BMW, but reborn with new found acceleration and speed. In order to accomplish this, the boost is tapered at the higher levels to keep from overheating and damaging the turbos. With a peak horsepower of 398 at 5700 RPM and the peak torque of 429 lb-ft at 4300 RPM as tested with Dinan High Capacity Oil Cooler System, it's a monumental increase over the stock 300 horsepower and 300 lb-ft of torque BMW quotes. Increased boost pressure exceeds the turbochargers' design limitations at higher RPM, potentially shortening their lifespan. Dinan addresses this issue by tapering the boost gradually at higher engine speeds. This approach also addresses the fact that with increased boost at higher RPM the turbocharger temperatures would exceed the intercooler's ability to cool the intake charge, resulting in a loss of power and compromising the long-term durability of the engine. The tapered boost keeps temperatures within the design limitations so as to optimize output and ensure engine reliability with the added boost pressure. Turbos and intercooler arent the only thing to consider, however. The N54 engine is known to run a little warm in stock form. In an effort to more effectively control oil and water temperatures, the Dinan software actually increases water pump speeds as boost pressure increases. Properly returned fuel mixtures to the DME along with a correct tune means keeping the engine running cooler with less wasted fuel. Ignition timing is a critical part of the equation to limit engine knock, one that many tuning companies ignore, Dinan Performance Software includes full map rescaling to protect the engine and keep everything running smoothly. Dinan's software also removes the top speed governor so the BMW will be capable of achieving its "natural" top speed.


  • More Power (with Oil Cooler and Intercooler, where applicable): Max gains of +85 HP @ 4300 RPM and +107 lb-ft TRQ @ 4000 RPM
  • 50 State Emissions legal; CARB EO # D-176-39
  • Full map rescaling
  • Improved throttle response
  • Top speed governor removed
  • Properly returned fuel mixtures
  • Remapped water pump speeds to control engine temp
  • 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 HP300
Factory Rated Torque (lb-ft)300
Labor Time (Hours)1
Max HP Gain85 @ 4300 RPM
Max Torque (lb-ft) Gain107 @ 4000 RPM
Peak HP398 @ 5600 RPM
Peak HP Gain66 @ 5600 RPM
Peak Torque (lb-ft)429 @ 4300 RPM
Peak Torque (lb-ft) Gain104 @ 4300 RPM
Product TypeEngine Software
Required ItemsDinan Oil Cooler (various SKU's) and Intercooler (D330-0009B, D330-0010B, D330-0012, D330-0013 or D330-0015) where applicable
Part NumberD900-30TC

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
Oil Cooler and Intercooler are required in order to run Stage 3 Engine Software.

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