Instead, a severe speed penalty is implemented into the system, forcing the player to use the brakes. The Takumi Mode in Battle Gear 3 is removed.The addition of European models (for example, Volkswagen Golf and Renault Clio (Lutecia) V6) and the European stages (with notable examples of the Monaco track and Monte Carlo Rally) representing a departure from Initial D.When compared to Battle Gear 3, there are certain features changed in this game. The online servers were shut down on March 31, 2019. The player can connect to the BG4 garage, and perform extensive modifications to the car. Subsequently, any rewards that a player gained are uploaded onto the server (if the player uses the entry key and the machine is connected). The BG4 entry keys are not compatible with the BG3 series entry keys. When coupled with the NESYS network entry key (sold separately), the key users can have their cars 'downloaded' from the virtual garage, and used during the play. This allows the machine to access time attack records and similar information online, and to upload the new records. The Type X motherboard has a function to connect to the Internet. The professional version was released in November 2006. They are used together to simulate full manual shifting. A newer variant of the cabinet Battle Gear 4 Tuned Professional Version, sports a further clutch pedal, and an H-shaped gearbox control.

Both boosts in engine power come at the cost of reduced handling. A ' Nitrous switch' is available as well, which triggers either the Nitrous Oxide system on tuned NA cars, or a scramble boost function on tuned cars utilizing forced induction. The typical controls include the gas and brake pedals, a steering wheel, a + / - gear stick, and a handbrake. The game runs on the Taito Type X motherboard, and has capability of connecting to the Internet.

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