Alpine Authorized Online Dealer

Interactive graphics display greatly enhances camera-only viewing

Check out the above video to see how this Alpine backup sensor system will make it safer for you, your car, and anything else while you're backing up. The VPX-B104R VPASS (Visual Parking Assist Sensor System) includes four OEM-grade ultrasonic sensors that mount in your rear bumper, working with your rear-view camera system to guide you into parking spaces. The VPASS works with all 2011-up Alpine rear-view cameras and most other brand rear-view camera systems as well.

Shows the distance as you back up and gives warning

The system creates nine zones in the space behind your vehicle, which display in a 3-color grid that overlays your camera image. The sensors will detect most large stationary objects, highlight the grid it's in, and give audible and visual warnings as you back up. If you're employing a multi-view camera, the VPASS will automatically switch to the downward viewing angle when you're in the red zone, getting close to whatever's back there. The display also shows the exact distance from your rear bumper to the obstruction, for bump-free parking even in the darkest garages.


  • backup sensor kit for Alpine camera systems
  • includes four sensors, wiring harness, interface
  • camera input and video output
  • 3-color, 9-space warning grid with matching audible alerts
    • 6' to 3' = green grid highlights, slow beep, no message
    • 3' to 1.5' = yellow grid highlights, fast beep, "caution" message
    • 1.5' to 0.7' = red grid highlights, continuous beep, "warning" message
  • compatible with any 2011-up Alpine camera system
  • will work with most cameras and in-dash video displays
  • warranty: 1 year
  • Our 60-day money-back guarantee
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Hands-on research

What's in the box?

Download owner's manual

  • Visual parking assist sensor module
  • 4 Sensor units
  • Buzzer
  • Setup switch
  • 11" Wiring harness
  • 11.5' Sensor cable
  • 11.75' Camera cable
  • 8 Sensor caps
  • 8 Spring plates
  • 4 Rubber rings
  • Rubber grommet
  • 4 Self-adhesive bases
  • 12 Wire-ties
  • 2 Sections of velcro
  • 4 Guide stickers
  • Owner's Manual (En/Fr/Sp)
  • Calibration sheets
  • Online Product Registration info
  • Correction sheet

Product Research



Overview: The Alpine VPX-B104R Visual Parking Assist Sensor System (VPASS) utilizes four OEM-grade ultrasonic reverse sensors for parking that are installed in the vehicle's rear bumper. When used in conjunction with a rear-view camera (sold separately), the VPASS system helps guide you (the driver) when backing into a parking space. When the parking space is viewed on your in-dash monitor (through optional rear-view camera), a three-color grid (red/yellow/green) is overlaid onto the lines of the parking space in nine zones (three each to the rear, rear left, and rear right). If an object is detected in any of the zones, the grid is highlighted and audible warnings are emitted. Precise distance measurements behind the vehicle are also displayed for additional peace-of-mind for you, the driver.

 Note: Never rely solely on the backup sensors; always look behind you before backing up. The sensors may not always detect people or animals in the path of your vehicle.

4 Backup Sensors: The Alpine VPX-B104R Visual Parking Assist Sensor System (VPASS) includes 4 backup sensors that detect large stationary objects behind your vehicle when maneuvering the vehicle in reverse at low speed. The backup sensors are installed along your vehicle's rear bumper (left-to-right).

Note: A 15/16" drill bit is required in order to mount the system's sensor units.

Buzzer: The Alpine VPX-B104R Visual Parking Assist Sensor System (VPASS) features a buzzer that is mounted inside your vehicle. The buzzer sounds an audible beep when the system detects an object behind you and your vehicle.

  • Slow beep from 6' to 3'
  • Fast beep from 3' to 1.5'
  • Continuous beep from 1.5' to 0.7'

Visual Alerts: Multi-color parking guidelines (Red/Yellow/Green) appear on your connected monitor's screen (when using optional rear-view camera) to assist you in backing up your vehicle. Each line represents a distance:

  • Green (No Message) from 6' to 3'
  • Yellow (Caution) from 3' to 1.5'
  • Red (Warning) beep from 1.5' to 0.7'


VPASS Interface Module:

  • Width = 5.5"
  • Height = 1.0"
  • Depth = 3.0625"


  • Width = 0875"
  • Height = 0.875"
  • Depth = 1.9375"


  • Width = 1.75"
  • Height = 0.4375'
  • Depth = 1.1875"

Setup Switch:

  • Width = 2.0"
  • Height = 0.25"
  • Depth = 0.8125'

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