CBB58-0001 – Smooth Power Flash Tuner Stage 1 Software M240i, 340i, 440i, 540i, 640i, 740i

Part Number: CBB58-0001 Category: Tags: , , , , , , , , , , ,
(4 customer reviews)



Calculated Flywheel Power:

OEM Stock:  345HP / 355TQ
Tuned 93 Octane:    406HP / 388TQ

Measured Wheel Power:

OEM Stock   304WHP / 312WTQ
Tuned 93 Octane:   357WHP / 342WTQ

  • Stage 1 software $500
  • Warranty Option $750
  • Flashing tablet $299
  • Exhaust overrun option $100.00
  • Top Speed Governor Removed
  • Saves stock program
  • Reads and clears faults
  • Upgrades can be emailed to you and installed in your flash tuner using your personal computer


Additional Information

Smooth Power Flash Tuner Stage 1 software for B58 equipped models M240i, 340i, 440i, 540i, 640i, 740i Chassis- F20, F22, F23, F30, F32, F33, F34, F36, G30, G32, G11, G12


The smooth power flash tuner can upload your stock file for safe keeping, read and clear faults. It can receive software updates from your PC emailed to you by CarBahn. These files can be free updates or increased performance tunes that to match hardware upgrades you purchase from CarBahn. The software comes with a two-year product warranty, as well as a factory-matching 4 year/50,000mi powertrain warranty.* (Please see bottom of page for details)


CarBahn software is designed to deliver the highest safe output possible. Smooth Power means software tuned correctly, not over-tuned. We always try to make a natural torque curve, not excessive torque at low RPM that falls off rapidly at high RPM. Excessive torque will break the tires loose, break the engine and drivetrain. Managed torque with a smooth delivery makes the car easier to drive thereby faster and more reliable. Most if not all our competitor tunes attempt to run too much boost, resulting in active knock corrections which causes surging during acceleration.


Most if not all tunes on the market except CarBahn reduce safety parameters in the software in an attempt to extract more power. These safety parameters such as knock control sensitivity, super knocking control sensitivity, and catalyst thermal protection are tuned into your OEM software to prevent engine and catalyst failure. When we reduced all the supposed power robbing software protections we lost less than 8 HP and 8 LB/FT Torque. We have seen many damaged engines as result of reducing these safety parameters! It hardly seems worth it for 8HP.

Doing it yourself:

A note on self-tuning tools. There are now programs available that you can buy to tune your car yourself. Many of these tools come with canned programs. Be careful as tuning a high output engine requires tremendous knowledge and experience to extract maximum power without damage.

Emissions legality:

A note on down pipes (removing the catalyst). We have run back to back dyno runs with the cat on and off and the power gain is much smaller than most people claim. We all need to breathe the air. Its difficult to get your car its required emissions test without catalyst and it’s illegal.

High boost with stock engine:

We have seen many damaged engines as result of making too much power with a stock engine. While modern engines are very reliable, it is easy to add large turbochargers and water methanol injection and break the engine.

About Steve Dinan:

Steve Dinan has over 40 years of street car turbo experience. As an engine supplier we won 3 prototype racing championships and two overall wins at the 24hrs of Daytona partnering with Chip Ganassi Racing. No one know more about tuning high performance engines than Steve Dinan.


*Registration with CarBahn Autoworks at time of purchase is required in order to maintain matching warranty coverage. CarBahn Autoworks reserves the right to deny warranty program enrollment under certain conditions. Please contact us prior to purchase if you have any questions.

*Warranty valid on U.S. and Canadian specification vehicles only.If your vehicle is currently covered by the vehicle manufacturer new car limited warranty, CarBahn Autoworks’ products are warranted for the remaining term of the vehicle manufacturer new car limited warranty. The manufacturer new car warranty is limited to 4 years or 50,000 miles (80,000 kilometers in Canada), commencing on the date of first retail sale or the date the vehicle is first placed in-service as a demonstrator or company vehicle, whichever is earlier. CarBahn Autoworks’ warranties are transferable when ownership of the vehicle into which the CarBahn Autoworks products were originally installed is sold.The warranty will, without charge for parts or labor, repair or replace the defective CarBahn Autoworks’ component(s), as well as any original vehicle manufacturer component(s) that may have been directly affected by a CarBahn Autoworks component, using new or authorized remanufactured parts. The decision to repair or replace said parts is at the sole discretion of CarBahn Autoworks. Parts for which replacements are supplied under this limited warranty become the property of CarBahn Autoworks. In all cases, a reasonable period of time must be allowed for warranty repairs to be completed.

If your vehicle is outside of the vehicle manufacturer’s new car limited warranty, for two (2) years from the original purchase date of the CarBahn Autoworks product, CarBahn Autoworks will repair or replace, at its sole discretion, any defective CarBahn Autoworks component. This warranty does not include reimbursement for repairs to any original vehicle manufacturer component(s) that may have been affected by a CarBahn Autoworks component.

*Warranty exclusions:

Return shipping charges, towing charges, rental car fees damage to a component or assembly due to the installation of replacement parts with specifications that differ in any material respect from the original vehicle manufacturer or CarBahn Autoworks parts, damage resulting from the unauthorized modification of a CarBahn Autoworks part or assembly, damage resulting from the use of other manufacturer products in conjunction with CarBahn Autoworks’ products or systems, damage to the clutch due to power shifting or abuse, brake rotor warp, friction materials, maintenance services and parts when replaced during maintenance such as spark plugs, lubricants, fluids, engine tune-up parts, replacement of filters, coolant and refrigerant, mechanical adjustments or repairs which result from normal wear and tear, drive-belts, light bulbs, damage due to the failure to perform maintenance services at the specified intervals or in accordance with the instructions in the owner manual from the original vehicle manufacturer or CarBahn Autoworks’ product instructions, damage attributable to negligence or abuse, improper installation, improper treatment or treatment contrary to the instructions in the owner manual from the original vehicle manufacturer or CarBahn Autoworks’ product instructions, engine damage resulting from alteration of CarBahn Autoworks’ original boost pressure, damage resulting from the use of improper or contaminated fuel, damage occurring through corrosion resulting from weak or improper coolant, damage to a CarBahn Autoworks component as a result of a collision or improper collision damage repairs, any vehicle operated in any competitive event or subjected to aggressive track conditions, custom-designed competition parts, damages resulting from loss of time, inconvenience or loss of the use of the vehicle, damage resulting from environmental influences, flood, accident, fire damage, or road salt corrosion, re-manufactured or refurbished products or components (these products are clearly identified as re-furbished and are warranted for the period specified for that particular product).


  • 2016-2018 BMW 340i Sedan
  • 2016-2018 BMW 340i xDrive Sedan
  • 2016-2019 BMW 740i Sedan
  • 2017-2019 BMW 540i Sedan
  • 2017-2019 BMW 540i xDrive Sedan
  • 2017-2019 BMW 740i xDrive Sedan
  • 2017-2020 BMW 340i xDrive Gran Turismo
  • 2017-2020 BMW 440i Coupe
  • 2017-2020 BMW 440i Convertible
  • 2017-2020 BMW 440i Gran Coupe
  • 2017-2020 BMW 440i xDrive Convertible
  • 2017-2020 BMW 440i xDrive Coupe
  • 2017-2020 BMW 440i xDrive Gran Coupe
  • 2017-2020 BMW M240i Convertible
  • 2017-2020 BMW M240i Coupe
  • 2017-2020 BMW M240i xDrive Coupe
  • 2017-2020 BMW M240i xDrive Convertible
  • 2018-2020 BMW 640i xDrive Gran Turismo

4 reviews for CBB58-0001 - Smooth Power Flash Tuner Stage 1 Software M240i, 340i, 440i, 540i, 640i, 740i

  1. Jared V

    After weeks of researching tune options for my 18 340i I decided to go with Carbahn due to their outstanding reputation and the fact that I did not want an overly aggressive tune to ensure long-term dependability and performance. The power output is so smooth and very linear. Not a single fault or check engine light since tuning it and I could fell the difference from the moment I picked up the car.

    Eurowerks in Deerfield Beach performed the install. They were very knowledgeable, answered all my questions and even took me for a ride in one of their personal vehicle’s which had a Carbahn tune. I was sold after that!

    Very happy with my decision.

  2. Tony

    Love the tune makes my car feel like a new beast , the burble tune is just amazing

  3. John paul Hribar

    Loving the new tune, can really feel the added power on launches and during passing on the highway. No issues to date and have been running it for the past thousand miles without issue. When I turn off all the driver assists, this thing really takes off now. Added a lot more smiles to my driving experience.

    I opted to have the dealer install the initial tune and purchased the tablet in the event of a software update from a dealer service. Nice to have it in the event I need to reinstall the tune down the road or go back to stock.

  4. Richard Rowley

    I had this tune applied by Adam Fawbush’s team at BMW of Louisville. They are one of those rare dealers that love BMWs and tuning them as much as their clients do. After adding the Dinan CAI and exhaust to my 2017 M240i, Adam suggested that I consider CarBahn. I took him up on the offer this week. I looked at a lot of different tunes from other companies like BM3, Mission, etc, but CarBahn stuck out for two reasons: For one, they honor the BMW factory warranty. Their tune is not the most aggressive, but it is stable, generates no errors or check engine lights, and provides fantastic performance. I called CarBahn with a few questions, and they were passionate and quite knowledgeable about their products. The second reason was that I really trust Adam and the rest of the team at BMW of Louisville. They have treated me very well even though I have only ever purchased a used car from them, and it means a lot to me. They treat me with the same respect and enthusiasm as a customer spending $150k on a car. If you are looking for a tune that provides a great stable performance increase without voiding your warranty, I can wholeheartedly recommend Carbahn. The car is a rocketship now. And if you happen to be in the Louisville area, I suggest stopping by and speaking with Adam Fawbush. Thanks CarBahn.

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