CarBahn Performance BMW X3 M40i/X4 M40i 487 HP Stage 1 Performance Controller - CBPRC-0026

The CarBahn Performance 487 HP Stage 1 Performance Controller is a plug-and-play ECU tuning solution designed for the BMW X3 M40i and X4 M40i equipped with the B58 engine. Designed for G01 and G02 chassis vehicles, the CarBahn Performance Controller (CPC) increases turbocharger boost pressure to deliver additional horsepower and torque.

The CPC uses selectable performance maps controlled through a Bluetooth smartphone application. Drivers can select calibrations for 91, 93, or 100 octane fuel, allowing the controller to accommodate different fuel grades and performance requirements.

On 93-octane fuel, the controller produces up to 471 HP and 495 lb-ft of torque, while 100-octane fuel increases output to 487 HP and 504 lb-ft of torque.

The controller has an estimated installation time of approximately 2 hours.

Performance Specifications

93 Octane

100 Octane

CarBahn Performance Controller (CPC)

The CarBahn Performance Controller is a plug-and-play ECU device that increases boost pressure in turbocharged vehicles to increase horsepower and torque. The unit provides selectable maps through a Bluetooth smartphone application.

The CPC supports:

• 91-octane map
• 93-octane map
• 100-octane map
• Bluetooth smartphone control
• Plug-and-play installation
• Fuel-specific performance maps

An optional powertrain warranty is available for the CarBahn Performance Controller.

If you choose to trade the CarBahn Performance Controller for CarBahn software in the future, a $250 upgrade fee applies. If the optional warranty was purchased, it is transferable to the software at no additional charge.

Emissions Legality

CarBahn notes that removing the catalytic converter with a downpipe provides a relatively small performance gain, typically around 11 HP, based on back-to-back dyno testing. Removing the catalyst can make it difficult to pass required emissions testing and is illegal in certain applications and jurisdictions.

About Steve Dinan

Steve Dinan has more than 40 years of street-car tuning experience. As an engine supplier, his racing programs achieved three prototype racing championships and two overall victories at the 24 Hours of Daytona in partnership with Chip Ganassi Racing.

Detailed Fitment

• Make: BMW
• Model(s): X3 M40i and X4 M40i
• Vehicle Year(s): 2020, 2021, 2022, 2023, 2024, and 2025
• Transmission: Automatic
• Chassis: G01 and G02
• Body Style(s): SAV and Coupe SAV
• Drivetrain: AWD
• Engine: B58
• Measured Flywheel Horsepower: 471 HP
• Part Number: CBPRC-0026
• Installation Time: 2 hours
• Type: Tuning & Software
• Vendor: CarBahn

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.

The warranty is valid on U.S. and Canadian specification vehicles only.

If the vehicle is currently covered by the vehicle manufacturer's new car limited warranty, CarBahn products are warranted for the remaining term of the manufacturer's new car limited warranty. The manufacturer's new car warranty is limited to 4 years or 50,000 miles, or 80,000 kilometers in Canada, commencing on the date of first retail sale or the date the vehicle is first placed into 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, without charge for parts or labor, repair or replace defective CarBahn components as well as original vehicle manufacturer components that may have been directly affected by a CarBahn component, using new or authorized remanufactured parts. The decision to repair or replace 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.

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

Warranty Exclusions

The warranty does not cover:

• Return shipping charges
• Towing charges
• Rental car fees
• Damage caused by installing replacement parts with specifications materially different from the original vehicle manufacturer or CarBahn parts
• Damage resulting from unauthorized modification of a CarBahn part or assembly
• Damage resulting from using other manufacturers' products in conjunction with CarBahn products or systems
• Clutch damage caused by power shifting or abuse
• Brake rotor warping
• Friction materials
• Maintenance services and maintenance replacement parts such as spark plugs, lubricants, fluids, engine tune-up parts, filters, coolant, and refrigerant
• Mechanical adjustments or repairs resulting from normal wear and tear
• Drive belts
• Light bulbs
• Damage resulting from failure to perform maintenance services at specified intervals or according to the original vehicle manufacturer's or CarBahn product instructions
• Damage caused by negligence or abuse
• Improper installation
• Improper treatment or treatment contrary to the original vehicle manufacturer's or CarBahn product instructions
• Engine damage resulting from alteration of CarBahn's original boost pressure
• Damage caused by improper or contaminated fuel
• Damage caused by corrosion resulting from weak or improper coolant
• Damage to CarBahn components resulting from collision or improper collision damage repairs
• Vehicles operated in competitive events or subjected to aggressive track conditions
• Custom-designed competition parts
• Damages resulting from loss of time, inconvenience, or loss of vehicle use
• Damage resulting from environmental influences, flooding, accidents, fire, or road salt corrosion
• Remanufactured or refurbished products or components, except where specifically identified and covered for the warranty period specified for that particular product