How do you take a speed limiter of mazda6?

To remove the speed limiter of a Mazda6, you will need to access the engine control unit (ECU) of the vehicle. It is generally not advisable to remove speed limiters, as they are designed to ensure the safety of yourself, other road users, and the vehicle. If you're looking to enhance the performance of your vehicle, there are other modifications that can be made, such as upgrades to the engine, exhaust, suspension, and brakes. Alternatively, you can contact a professional mechanic to see if there are any specialized services available for your particular Mazda6 model.