CarBahn Performance Tuning

Tune Your Way.

One performance standard. Multiple ways to get there. Choose a plug-in Performance Controller or a complete ECU calibration—then build the setup that fits your car, your fuel, and your goals.

Start with your tuning path

Performance Controller

Plug in. Power up.

Simple + reversible

Add meaningful power without flashing the factory ECU. It is the straightforward choice for drivers who want a quick installation, app-controlled octane maps, and an easy path back to stock.

Installs in about an hour with no special programming tools
App-controlled 91, 93, and 100-octane maps
No DME unlock or ECU flash required
Available Stage 1 and Stage 2 upgrade paths
$250 trade-in credit toward ECU Software later

Shop Performance Controllers

ECU Software

Unlock the full potential.

Maximum capability

CarBahn ECU Software directly calibrates the engine management system for increased power, torque, drivability, and control. Choose from available Stage 1, Stage 2, and Stage 3 packages.

Complete engine calibration installed by an authorized dealer
Available top-speed governor removal and performance features
Optional Flex Fuel, burbles, Remote Start, and matching warranty where compatible
Stage-specific supporting hardware may be required
Can be flashed back to stock when needed

Explore ECU Software

Available with compatible ECU tuning

Locked DME?

Autotuner Bench Unlock

No overseas shipment required. If your DME is locked, a participating CarBahn dealer can perform the required Autotuner bench unlock at the time of installation, then install your calibration. Any dealer unlock labor or fee is handled by the installing dealer and is not added to your online cart.

Want fuel flexibility?

Flex Fuel

Compatible Flex Fuel calibrations automatically adapt to measured ethanol content. Run pump gas, ethanol, or a blend without manually switching maps—your tune adjusts as the fuel blend changes.

Still Deciding?

Choose a Performance Controller for the simplest no-flash installation. Choose ECU Software for a complete calibration, broader feature support, and the greatest performance potential.

Find a Dealer

Product availability, features, power gains, fuel requirements, unlock support, warranty options, and required hardware vary by vehicle and calibration. Confirm compatibility on the applicable product page or with an authorized CarBahn dealer.

Shop Power & Tuning for Popular Models

G87 M2

2023+ BMW M2

G80 M3

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G82 M4

2021+ BMW M4

G90 M5

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F90 M5

2018-2023 BMW M5

F92 M8

2020+ BMW M8

F9X X3M & X4M

2019+ BMW X3M & X4M

F9X X5M, X6M & XM

2020+ BMW X5M, X6M & XM

G42 M240i

2021+ BMW M240i

G20 M340i

2019+ BMW M340i

G22 M440i

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G30 M550i

2017+ BMW M550i