Subaru Forester 2019-2022 Owners Manual / Starting and operating / Reverse Automatic Braking (RAB) system (if equipped)

Subaru Forester: Starting and operating / Reverse Automatic Braking (RAB) system (if equipped)

Reverse Automatic Braking (RAB) is a system designed to help avoid collisions or reduce collision damage when reversing the vehicle. If a wall or an obstacle is detected in the reversing direction, the system will notify the driver with a warning sound and may activate the vehicle’s brakes automatically.


  • Reverse Automatic Braking (RAB) is not a system intended to replace the driver’s responsibility to check surrounding areas for vehicles or obstacles to avoid a collision.
  • The driver is responsible for driving safely. Before reversing, be sure to first depress the brake pedal and visually check the surroundings.
  • There are some cases in which the vehicle cannot avoid collision, because the system operation has limitations. The warning sound or automatic braking may be delayed or may not operate at all even when an obstacle is present.
  • The system is not designed to detect people (including children), animals or other moving objects.
  • Depending on the vehicle condition or the surrounding environment, the sonar sensor’s ability to detect objects may be compromised.
  • Do not remove the SUBARU genuine navigation and/or audio system. If the SUBARU genuine navigation and/or audio system is removed, the rear view camera image and help lines (distance marker, dynamic guidelines and vehicle width lines) will no longer be displayed.
  • Even if the Reverse Automatic Braking (RAB) system and object detection warning is ON, the visible alert of Reverse Automatic Braking (RAB) system will not be displayed. However, the audible alert and its function will operate.


The Reverse Automatic Braking (RAB) system records and stores the following data when automatic braking operates. It does not record conversations, personal information or other audio data.

  • Distance from the object
  • Vehicle speed
  • Accelerator pedal operation status
  • Brake pedal operation status
  • Select lever position
  • Outside temperature
  • The sensitivity setting of the sonar sensors

SUBARU and third parties contracted by SUBARU may acquire and use the recorded data for the purpose of vehicle research and development. SUBARU and third parties contracted by SUBARU will not disclose or provide the acquired data to any other third party except under the following conditions.

  • The vehicle owner has given his/her consent.
  • The disclosure/provision is based on a court order or other legally enforceable request.
  • Data that has been modified so that the user and vehicle cannot be identified is provided to a research institution for statistical processing or similar purposes.

Handling of radar sensors


Reverse Automatic Braking (RAB) system overview

The system detects objects using sonar sensors installed in the rear bumper. If the system determines a possible collision with an object in the reversing direction, automatic deceleration will be activated...

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