Add a deeper, louder auxiliary horn to a Gen 1 Rivian R1T or R1S while retaining the factory horn system. This vehicle-specific kit mounts in a recessed area beneath the front trunk and adds an air-horn-style tone to the existing single- or dual-horn setup.
Gen 1 R1T and R1S only. Fitment has not been confirmed for 2025 vehicles.
Verify the factory horn location
Look through the front bumper grille and compare the horn location with the product-gallery photos before ordering.
- Factory dual horns or a single driver-side horn: select Dual/Driver Horn Upgrade Kit
- Single passenger-side horn: select Passenger Horn Upgrade; this configuration includes the required harness extension
- If both driver- and passenger-side grille areas have solid plastic covers, select the passenger-side configuration
Kit contents
- Auxiliary horn
- Rivian-specific mounting bracket
- Relay and wiring harness
- Y-connector
- Required mounting hardware
- Passenger-side harness extension when that option is selected
Installation and sound overview
Follow the supplied wiring, fuse, relay, and mounting instructions. Disconnect vehicle power as directed before electrical work, and confirm the horn and all surrounding systems operate correctly before driving.