How Does Curt RVi 4 Supplemental Brake For Flat Towing Know When To Apply Toed Brakes?
Updated 09/03/2025 | Published 08/07/2025
Question:
How does the Curt RVi4 know when to apply the brakes? My older one years ago when I used it would act up sometimes and not work when needed.
asked by: Denise
Expert Reply:
The RVi4 Portable Supplemental Braking System from Curt # RVI44FR uses an onboard accelerometer to detect changes in inertia, so when your motorhome slows down, the RVi4 senses it and applies the toad’s brakes proportionally. It even adjusts for uphill and downhill slopes, so it’s not more sensitive going downhill like some older systems. Pretty smart braking tech in a simple setup.
What system have you used in the past?
(click to enlarge)
Product Page this Question was Asked From
Curt RVi Series 4 Portable Flat Tow Brake System - Wireless Monitor - Proportional
- Flat Tow Brake System
- Brake Systems
- Proportional System
- Every-Trip Setup
- 12V Outlet
- Portable System
- Air Brakes
- Air Over Hydraulic Brakes
- Hydraulic Brakes
- Wireless Display
- CURT
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on Flat Tow Brake System
Denise
9/3/2025
That’s a lot better than the old box I had, Andrew. Does the RVi4 still need to be calibrated every time I set it up?