CarBahn BMW X3M/X4M 703 HP Stage 2 Performance Controller

The CarBahn Performance Controller (CPC) is an easy-to-install electronic control unit (ECU) that significantly boosts the turbocharged cars’ horsepower and torque. This plug-and-play unit offers selectable maps, which can be accessed through a smartphone application via Bluetooth.

To access this app, you can download them from either the Apple App Store or the Google Play Store.

These maps are designed to accommodate different octane fuels for additional increased performance. You can choose between 91, 93 and 100 Octane. As with all CarBahn products an optional powertrain warranty can be purchased.

Additionally, CarBahn offers an optional powertrain warranty for all their products, including the CPC.

If you want to trade your CarBahn Performance Controller in for software in the future, there is a $250 upgrade fee and if you purchased the warranty, it is transferable to the software at no additional charge!

Emissions legality:

Let us address the topic of removing the catalyst, commonly achieved through the utilization of downpipes. Our rigorous testing regimen involved conducting consecutive dyno runs with and without the catalyst, and the observed power gain was significantly smaller than commonly touted, typically around 11 HP. Nevertheless, it is important to acknowledge our shared responsibility towards environmental preservation, as clean air is vital to our well-being. Furthermore, obtaining the necessary emissions certifications without a catalyst is a daunting task and, from a legal standpoint, it is considered an infringement.

About Steve Dinan: 

With an illustrious career spanning over four decades, Steve Dinan stands as an authority in streetcar turbo tuning. Under his leadership, our team has triumphed in three prototype racing championships and secured two overall victories at the esteemed 24 Hours of Daytona in collaboration with Chip Ganassi Racing. Steve Dinan’s unparalleled expertise solidifies our claim as the leading force in tuning high-performance engines.

Warranty Information:

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

* The warranty is valid for U.S. and Canadian specification vehicles only. If your vehicle is currently covered by the vehicle manufacturer’s new car limited warranty, CarBahn products are warranted for the remaining term of the vehicle manufacturer’s new car limited warranty. The manufacturer’s new car warranty is limited to 4 years or 50,000 miles (80,000 kilometers in Canada), starting from 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 warranties are transferable when ownership of the vehicle into which the CarBahn products were originally installed is sold. The warranty will repair or replace, without charge for parts or labor, the defective CarBahn component(s) as well as any original vehicle manufacturer component(s) directly affected by a CarBahn component, using new or authorized remanufactured parts. The decision to repair or replace said parts is at the sole discretion of CarBahn. Parts replaced under this limited warranty become the property of CarBahn. A reasonable period must be allowed for warranty repairs to be completed in all cases. If your vehicle is outside of the vehicle manufacturer’s new car limited warranty, CarBahn will, at its sole discretion, repair or replace any defective CarBahn component for two (2) years from the original purchase date of the CarBahn product. This warranty does not include reimbursement for repairs to any original vehicle manufacturer component(s) that may have been affected by a CarBahn component.

* Warranty exclusions:

The following are not covered under the warranty: return shipping charges, towing charges, rental car fees, damage to a component or assembly due to the installation of replacement parts that materially differ from the original vehicle manufacturer or CarBahn parts, damage resulting from the unauthorized modification of a CarBahn part or assembly, damage resulting from the use of other manufacturer products in conjunction with CarBahn products or systems, damage to the clutch due to power shifting or abuse, brake rotor warp, friction materials, maintenance services and parts replaced during maintenance such as spark plugs, lubricants, fluids, engine tune-up parts, replacement of filters, coolant, and refrigerant, mechanical adjustments or repairs resulting 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’s manual from the original vehicle manufacturer or CarBahn product instructions, damage attributable to negligence or abuse, improper installation, improper treatment or treatment contrary to the instructions in the owner’s manual from the original vehicle manufacturer or CarBahn product instructions, engine damage resulting from alteration of CarBahn’s 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 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 refurbished and are warranted for the specified period).