6 Best Brake System Installation Kits for RV Towing

Imagine hurtling down a steep mountain pass in a thirty-foot motorhome when the traffic ahead suddenly screeches to a dead halt. Without an auxiliary braking system, the thousands of pounds of towed vehicle behind you becomes a runaway battering ram, pushing your rig far past its safe stopping limits. Choosing the right brake installation kit is not just about legal compliance; it is the single most critical decision you will make for the safety, control, and longevity of your mobile lifestyle.

Disclosure: As an Amazon Associate, this site earns from qualifying purchases. Thank you!

Blue Ox Patriot 3: Best Portable Braking System

The Blue Ox Patriot 3 stands as the premier option for those who want a powerful, proportional braking system without committing to a permanent, invasive vehicle modification. This system sits on the floor of the towed vehicle’s driver’s seat, pressing the brake pedal physically using an electric actuator when it senses deceleration. It is ideal for RVers who swap towed vehicles frequently or lease their daily drivers.

Setup is incredibly straightforward, requiring only a quick calibration push and a plug into the 12-volt accessory outlet. A wireless controller sits inside the motorhome cab, allowing real-time adjustments and manual override capabilities at the touch of a button. However, storing this bulky unit when not in use can be a challenge in tight RV quarters.

Some users find the daily routine of positioning, plugging in, and testing the unit tedious during rapid multi-stop travel. If you want a system that transfers easily between multiple cars and does not require cutting into your vehicle’s hydraulic or electrical lines, this is the absolute best choice on the market. Do not buy it if you absolutely loathe setup rituals before every single drive.

Roadmaster InvisiBrake: Best Hidden Installation

For travelers who want their towed vehicle to look completely stock and require zero setup before hitting the road, the Roadmaster InvisiBrake is the gold standard. This small controller mounts permanently under a seat or in the trunk, completely out of sight and out of mind. It connects to the towed vehicle’s brake pedal via a hidden cable and pneumatic cylinder, engaging seamlessly whenever the RV’s brakes are applied.

A massive advantage of this system is its built-in battery charger, which trickle-charges the towed vehicle’s battery while driving. This solves a major pain point for flat-towing enthusiasts whose vehicles suffer parasitic power drains during long hauls. The tradeoff is the initial installation, which is highly labor-intensive and often requires professional routing of cables and air lines.

Once installed, there is no heavy machinery to lift, store, or calibrate every morning. You simply plug in the electrical umbilical cord between the RV and the car, and the system is ready to roll. This is the ultimate system for long-term travelers who want a seamless, set-and-forget solution and do not mind paying more upfront for a complex installation.

Demco Stay-IN-Play DUO: Best for Motorhomes

The Demco Stay-IN-Play DUO is engineered specifically for motorhomes utilizing hydraulic braking systems, offering unmatched reliability through its dual-signal activation. It requires both a physical deceleration force and an electrical brake signal from the coach before it applies the towed vehicle’s brakes. This prevents accidental braking on bumpy roads or during exhaust brake engagement on steep descents.

The unit installs permanently under the hood of the towed vehicle, connecting to the vacuum power brake assist system. This means your towed vehicle stops with the same power-assisted ease as if a human were sitting in the driver’s seat pressing the pedal. The actual pedal connection is a tiny, unobtrusive cylinder that remains connected to the brake pedal arm permanently.

While it requires some mechanical aptitude to install, the day-to-day operation is as simple as flipping a toggle switch. This system is perfect for Class A or Class C motorhome owners who want a permanent, highly responsive, and fail-safe braking setup. If your coach has air brakes, however, look elsewhere, as this system is tailored exclusively for hydraulic coach brakes.

BrakeBuddy Select 3: Best Responsive Setup

Responsive braking can make the difference between a controlled stop and a terrifying slide, and the BrakeBuddy Select 3 excels at delivering instant, customized feedback. This portable unit features industry-leading technology that allows users to switch between proportional and full-braking modes on the fly. Proportional mode mirrors the exact pressure you apply to the RV’s brakes, while full-braking mode delivers a preset pressure for heavy-duty stopping power.

The handheld remote sits in the coach cockpit, providing instant diagnostics and allowing manual adjustments to sensitivity and braking force. It even alerts you to a breakaway situation or if the towed vehicle’s battery is running low. Like all portable systems, it takes up valuable space, but its lightweight chassis makes it easier to handle than older models.

This unit is highly recommended for RVers who travel through diverse terrains—from flat highways to mountain switchbacks—and want the ability to tune their braking response instantly. If you value detailed diagnostic feedback and a highly adaptable braking profile, the Select 3 is your best bet.

NSA ReadyBrute Elite II: Best Surge Braking Kit

NSA RB90502 READY BRUTE ELITE II TOW BAR Y

The NSA ReadyBrute Elite II offers a brilliantly simple, purely mechanical solution by integrating a surge braking system directly into the aluminum tow bar itself. As the motorhome slows down, the momentum of the towed vehicle pushes against the tow bar, mechanically pulling a cable that activates the car’s brake pedal. Because it does not rely on electronics, vacuum pumps, or external sensors, there are virtually no electrical components to fail.

This mechanical simplicity makes the ReadyBrute incredibly reliable and impervious to the electronic glitches that can plague computerized systems. It also eliminates battery drain on the towed vehicle, as the system requires zero electrical power to function. The installation requires routing a physical aircraft-grade cable from the front bumper through the firewall to the brake pedal, which requires precise tension adjustment.

This system is ideal for minimalist travelers, off-grid boondockers, and those who prioritize bulletproof mechanical reliability over high-tech gadgetry. If you want a high-end tow bar and a braking system wrapped into one elegant, lifetime-warranted package, this is the system to buy.

Roadmaster Even Brake: Best Automatic System

The Roadmaster Even Brake is a smart, portable proportional braking system that takes the guesswork out of setup with its advanced automatic diagnostics. When powered up, the unit automatically performs a series of self-tests, depressing the brake pedal to deplete any vacuum build-up in the car’s power brakes. This ensures that the system accurately calculates the exact pressure needed to stop the vehicle safely from the very first mile.

It utilizes a sophisticated internal accelerometer that senses changes in speed and instantly applies matching braking force. The companion monitor inside the RV keeps you constantly informed of the system’s status and alerts you to any errors or pressure anomalies. The main drawback is the physical footprint, as the unit must be braced securely against the driver’s seat every time you tow.

For those who want the convenience of a portable system but demand the safety assurance of automatic electronic self-testing, the Even Brake is unmatched. It is the perfect choice for safety-conscious RVers who want clear, active communication from their towed vehicle’s braking system at all times.

Choosing Between Portable and Permanent Systems

The debate between portable and permanent braking systems comes down to a fundamental trade-off: convenient installation versus daily operational ease. Portable systems are perfect for those who lease their towed vehicles, change cars frequently, or want to avoid invasive modifications. They can be moved from vehicle to vehicle with minimal fuss, but they require physical setup, calibration, and storage space every single time you move camp.

Permanent systems, conversely, require a significant upfront investment of time and money but offer a seamless “plug-and-play” experience thereafter. Once the wiring, air lines, and actuators are installed, prepping the vehicle for towing takes seconds. Consider these distinct factors when deciding between the two:

• Portability: Ideal if you own multiple tow cars or change vehicles often.
• Space Limitations: Portable units require storage in the RV or towed car when not in use.
• Setup Time: Permanent systems require zero daily configuration, while portables add 5–10 minutes to every hookup.

Consider your travel style and physical capabilities before making a final choice. Lifting a fifteen-pound portable unit in and out of a cramped footwell can become tiresome, especially in inclement weather. If you plan to flat-tow the same vehicle for the next five years, a permanent installation is almost always the more satisfying long-term investment.

Step-by-Step Tips for Safe DIY Installation

Undertaking the installation of a towed vehicle braking system requires patience, the right tools, and a solid understanding of your vehicle’s mechanical and electrical layouts. Always begin by disconnecting the towed vehicle’s battery to prevent accidental short circuits or airbag deployment while working under the dashboard. Clear out the driver’s side footwell completely, and use a bright, adjustable work light to illuminate the cramped space under the dash.

When mounting permanent actuators or routing mechanical cables, ensure they align perfectly straight with the brake pedal arm. Any off-angle pulling can cause premature wear on the cable, bind the mechanism, or apply uneven pressure to the master cylinder. Use heavy-duty zip ties and protective loom to secure all wiring and pneumatic lines away from hot engine components, sharp metal edges, and steering linkages.

For electrical connections, use high-quality heat-shrink butt connectors rather than standard electrical tape to prevent moisture intrusion and corrosion. Test the breakaway switch thoroughly by pulling the pin while the system is powered to ensure it instantly locks the brakes. Taking your time during these steps ensures that the system will function flawlessly when you need it most.

Understanding Towed Vehicle Braking Laws

Navigating the legal landscape of towed vehicle braking can be confusing because regulations vary significantly by state and Canadian province. Some jurisdictions require auxiliary brakes for any towed vehicle weighing over 3,000 pounds, while others set the threshold as low as 1,500 pounds. In certain states, any combination of vehicles that cannot stop within specified distance limits must utilize an auxiliary system, regardless of weight.

Relying on the rules of your home state is a dangerous gamble, as traffic laws are strictly enforced based on where you are currently driving. Law enforcement officers and insurance adjusters look closely at auxiliary braking compliance in the event of an accident. Failing to use a certified system can result in heavy fines, liability for damages, and the potential denial of insurance claims.

To stay safe and legally compliant, it is highly recommended to equip your towed vehicle with a braking system that meets the most stringent requirements across North America. Preparing for the lowest common denominator—typically a 1,500-pound weight threshold—guarantees peace of mind no matter where your travels take you. This proactive approach ensures you are always driving legally and safely across all borders.

How to Test and Maintain Your Braking Setup

Regular testing and preventative maintenance are critical to ensuring your auxiliary braking system performs reliably in an emergency. Before departing on any trip, perform a manual test run by activating the override switch on your in-cab controller at slow speeds. You should feel a distinct tug from the towed vehicle, confirming that the brakes are engaging smoothly and with appropriate force.

Inspect the physical components periodically, paying close attention to the breakaway cable, electrical umbilical cord, and mechanical linkages. Look for signs of fraying on cables, corrosion inside electrical plugs, and leaks in pneumatic lines. For permanent systems, check that the actuator cylinder under the dash remains securely fastened and has not slipped out of alignment.

Additionally, keep a close eye on the wear patterns of the towed vehicle’s brake pads and rotors. If you notice uneven wear, the auxiliary system may be set too aggressively, causing the towed vehicle to do more than its fair share of the braking work. Adjusting the sensitivity downward can prevent premature brake wear and save you from expensive replacement costs down the road.

Safely towing a vehicle behind an RV is all about maintaining control and reducing anxiety on the open road. By selecting the right braking kit for your specific rig and travel style, you invest in both your vehicle’s longevity and your own peace of mind. Take the time to install, test, and maintain your setup properly, and enjoy the freedom of the road with absolute confidence.