2024 Service to disable the engine braking feature for Nissan cars that use a CVT transmission such as the Altima, Sunny, Sentra, Maxima, X-Trail, and others. Disabling this feature makes the vehicle move more smoothly after releasing the accelerator pedal without the feeling of braking and resistance from the engine, which causes discomfort for some Nissan car owners. - It makes driving smoother :)