1. Trailer Brake Controller
  2. Curt
  3. Proportional Controller
  4. Up to 4 Axles
  5. OLED Display
Curt Assure Trailer Brake Controller with Dynamic Screen - 1 to 4 Axles - Proportional
Curt - $30 Mail in Rebate on select Premium Brake Controllers - 9/1/21 - 10/31/21

Curt Assure Trailer Brake Controller with Dynamic Screen - 1 to 4 Axles - Proportional

Item # C49UR
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Retail:$227.95
Our Price: $172.95
$142.95 after $30.00 Mail-In Rebate
Trailer Brake Controller
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Proportional brake controller features large, high-quality 1-1/2" OLED screen that displays full-text readout. Includes 9 sensitivity settings, reverse polarity protection, and continuous diagnostics. Lowest Prices for the best trailer brake controller from Curt. Curt Assure Trailer Brake Controller with Dynamic Screen - 1 to 4 Axles - Proportional part number C49UR can be ordered online at etrailer.com or call 800-298-1624 for expert service.
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  • Reviews (15)
  • Q & A (21)
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  • Why etrailer?

Curt Trailer Brake Controller - C49UR

  • Proportional Controller
  • Curt
  • Up to 4 Axles
  • OLED Display

Proportional brake controller features large, high-quality 1-1/2" OLED screen that displays full-text readout. Includes 9 sensitivity settings, reverse polarity protection, and continuous diagnostics.


Features:

  • Brake controller activates trailer brakes in proportion to your vehicle's braking action
    • Automatically adjusts trailer's braking based on deceleration of tow vehicle
    • Activates immediately - no pausing like with time-delayed brake controllers
  • Large, high-quality 1-1/2" OLED screen displays full-text readout
  • 9 Sensitivity settings (boost settings) let you adjust initial braking power and aggressiveness
  • Triple-axis accelerometer is highly responsive - ensures smooth, uniform stopping action
  • Continuous diagnostic check alerts you to any potential problems
  • Integrated safeguards protect your vehicle, the trailer, and the controller
    • Minimizes drain on car battery by entering power conservation mode after 30 minutes of inactivity
    • Keeps trailer brakes from overheating by reducing power output to them during prolonged stops
    • Defends brake controller and trailer breakaway systems against shorts
    • Prevents positive and negative power reversal with built-in polarity protection
  • Compatible with low-voltage systems, PWM systems, ABS, and cruise control
  • Mounting bracket and hardware included
    • Plug-in, vehicle -specific brake control adapter (sold separately) can be used for certain applications to reduce installation time


Specs:

  • Application: trailers with up to 4 axles (8 brake assemblies)
    • Designed for use with electric or electric-over-hydraulic trailer brakes
  • Limited lifetime warranty


Proportional Braking

With a proportional brake controller, you can get heavy-duty emergency braking, general braking, or slow-to-an-idle braking for your trailer automatically. The intensity with which your trailer brakes are activated and the rate at which they are applied are dependent on the deceleration of your tow vehicle . This means that, unlike time-delay controllers - which send the same amount of preset power to your trailer brakes every time - proportional controllers are able to adapt to every braking situation differently. So, if you slam on the brakes in your truck, your trailer brakes will activate with that same extreme intensity. And if you merely slow down as you approach a red light, your trailer will gradually brake in the same manner. Just set the initial power level, select a sensitivity setting, and you're good to go.


As long as the Assure controller is properly mounted as indicated in the instructions, it will sense - via an internal inertia sensor - how your tow vehicle brakes. This triple-axis, inertia-based sensor responds to the deceleration of your tow vehicle as you brake by signaling the controller to send out enough power to your trailer brakes so that they are activated with an intensity that matches. The result is uniform braking across your towing setup. No push-pull action - just smooth, proportional braking every time.


OLED Display

The high-quality OLED display on this brake controller makes the screen much easier to read at a glance. And instead of displaying codes, which have to be looked up, this display shows full-text description of errors. By showing everything this way, you will be able to clearly and quickly see what is happening in real time with your trailer.


Sensitivity Settings

Once you have the overall power set, you can fine-tune the power output by adjusting the sensitivity of the internal sensor.


Use the switch on the side of the Assure to achieve your desired degree of intensity. Move the switch toward you to boost the power output, causing your trailer brakes to activate with more intensity right off the bat. This means that they will also reach maximum braking faster simply because they will start out at that higher intensity. This is particularly beneficial if you are towing a heavy load because the intensity required to stop that load may be far greater than that needed to halt your vehicle. Therefore, sending out more initial power to the trailer brakes - and causing them to reach maximum braking faster - allows you to better control the trailer so that it doesn't push your tow vehicle before coming to a complete stop.


There are 9 sensitivity levels (boost levels), with 1 being the least sensitive. At level 9, the sensitivity of the internal sensor is as high as it can go. When you change the setting, the display on the Assure will flash the level before reverting back to showing the power output.


Built-In Controls for Adjustable Power

Gain Control: This button will set the maximum power available when your trailer's brakes are applied. The OLED display will show the current output setting being used.


Load Control: This button will allow you to determine how aggressive you want your trailer's brakes to be. This is typically dependent on your personal driving preference.


Manual Control: When you push this, only the trailer's brakes will be applied. This can be used to send precise amounts of braking to your trailer at your discretion. The braking intensity will be indicated on the OLED display when you press this button.


Safety Features

The Assure offers advanced safety features to prevent damage to various components of your towing setup.


When the Assure is not in use, it will be in power-saving mode, reducing the power draw to minimize drain on your vehicle's battery. This power-conservation mode begins after 30 minutes of inactivity and ends the moment your vehicle's brake pedal is pressed. When you stop at red lights, or any time that your truck and trailer are at a standstill with the brakes applied for a prolonged period of time, the Assure will reduce the power output to your trailer's brakes, preventing them from overheating.


If ever there is a time that you need to brake your trailer separately from your tow vehicle, the manual override is easily accessible. Pushing this button engages the brakes on your trailer with either full power or the maximum power allowed by the output level, depending on which setting you select. In addition, when you activate this override, the brake lights on your trailer will illuminate, properly warning those behind you of the braking action of your rig.


Automatic Leveling and Simple Installation

The self-leveling feature of the Assure ensures that the brake controller continues to function even as you drive up steep hills or through the mountains. Simply mount it in your cab at a vertical angle that is within 90 degrees, and the controller will level itself automatically. Make sure that the controller is also positioned so that the side-to-side angle is within ±20 degrees.


Installation is a snap. After mounting the Assure unit in your cab using the included bracket, hardwire one end of the included pigtail harness directly into your vehicle. The other end plugs into the brake controller. To transfer the Assure to another vehicle or to remove it for storage, just unplug the unit and remove the screws that hold it in place in the bracket. Curt offers a spare mounting bracket (C51144 - sold separately) that can be used to affix the Assure in your other automobile.


Installation Accessories

For even easier installation, a vehicle-specific wiring adapter (sold separately) is available for most newer trucks and SUVs. One end of the custom adapter plugs into your vehicle, and the other end plugs into the controller - no hardwiring required.


Note: If a custom brake control wiring adapter is not available for your vehicle, one of the following will be required:

20-Amp circuit breaker (9506P - sold separately) for 2- to 4-brake applications

30-Amp circuit breaker (38630 - sold separately) for 6- to 8-brake applications


See also etrailer.com's exclusive 7- and 4-way brake control installation kit (ETBC7 - sold separately) if you don't already have a 7-way plug at the back of your vehicle.

51160 Curt Assure Proportional Trailer Brake Control with Dynamic Screen

Installation Details C49UR Installation instructions




Customer Reviews

Curt Assure Trailer Brake Controller with Dynamic Screen - 1 to 4 Axles - Proportional - C49UR

Average Customer Rating:  5.0 out of 5 stars   (15 Customer Reviews)

Proportional brake controller features large, high-quality 1-1/2" OLED screen that displays full-text readout. Includes 9 sensitivity settings, reverse polarity protection, and continuous diagnostics.

- C49UR
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Customer service is awesome needed this to pickup my trailer tomarrow they were able to get it to me next day. Also ygis trailer brake literally plug n play on 2003 chevy suburban.



- C49UR
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Package was delivered on time and in great condition.



- C49UR
by:

Install video and instructions on my 2007 Toyota Tacoma where very helpful, thank you for the kit!



- C49UR
by:

Brake controller came in less than 48 hours! Looks great, going to hook it up today! Thanks Etrailer



- C49UR
by:

Thanks for getting all the parts to me in a timely fashion.The product information was very helpful so that I could see how I can install in the right order. Thanks again for your help.



- C49UR
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Easy to install in my 2021 Toyota Tacoma. Make sure to order separate connector. The white connection is behind the foot rest left of the brake. Easy to find, installed in about 20 minutes.



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Ask the Experts about this Curt Trailer Brake Controller

  • Parts Needed to Install Curt C49UR Assure Brake Controller on 2021 Chevy Silverado
    To install the # C49UR Curt Assure brake controller in a 2021 Chevy Silverado, in addition to the controller you'll also need a # C51525 brake controller wiring harness. The harness plugs in to the connector located under the dash just left of the steering column next to the e-brake pedal as shown in the provided photo. I've linked to a demonstration video showing how the brake controller works.
    view full answer...
    Image 1 for
  • Recommended Curt Brake Controller Harness for a 2019 Ram 1500 Classic
    To get the Curt Assure Brake Controller # C49UR installed in your 2019 Ram 1500 Classic, you will need the Curt Customer Pigtail # C51458. This will plug directly into the port under your dash making install a breeze.
    view full answer...
  • Parts Needed To Install A Curt Assure Trailer Brake Controller On a 2012 Jeep Wrangler No Tow Wires
    To install the Curt Assure Trailer Brake Controller # C49UR on your 2012 Jeep Wrangler you will need some additional parts. If you have absolutely no trailer wiring you will need everything I am about to list, you will be able to disregard any parts that you already have. I'll start with the trailer connector. A brake controller requires a 7-way blade connector, for that you will need our Universal Installation Kit # ETBC7. This kit will include the 7-way connector wiring, relays, and...
    view full answer...
  • Parts Needed To Install Curt Assure C49UR In 2008 Nissan Pathfinder Without Factory 7-Way
    Actually your 2008 Nissan Pathfinder SE does have a factory trailer brake controller port underneath the dash even though it did not come with a factory 7-way connector. To install the Curt Assure Trailer Brake Controller # C49UR you were looking at you will just need to use the Curt Custom Wiring Adapter for Trailer Brake Controllers - Dual Plug In # C51382. I included videos for both of the products mentioned for you to take a look at.
    view full answer...
  • Parts Needed To Install Curt Assure Trailer Brake Controller In 2007 Chevy Silverado 2500HD Classic
    I have another option for you, but your 2007 Chevrolet Silverado 2500HD Classic has a factory trailer brake controller port so there is no need to cut any wires. To replace your current controller with the Curt Assure Trailer Brake Controller with Dynamic Screen - 1 to 4 Axles - Proportional # C49UR you will just need the # C51352 which will plug into the factory trailer brake controller port underneath the dash of your truck. I included video reviews for both of the products mentioned...
    view full answer...
  • Parts Needed to Install Curt Assure Brake Controller In 2002 Ford F-350
    To install the Curt Assure brake controller part # C49UR in your 2002 Ford F-350 all you need is the install harness part # C51322 and you'd be set.
    view full answer...
  • Install Harness for Curt Assure Brake Controller in 2007 Dodge Ram 2500
    To install the Curt Assure brake controller part # C49UR in your 2007 Dodge Ram 2500 all you need is the correct install harness # C51332 and you'd be set. This plugs into the brake controller port you have under your dash.
    view full answer...
  • Brake Controller Installation on 2001 Ford E350 Van
    Brake controllers like the # C49UR Curt Assure aren't a vehicle-specific item. You can install a brake controller on just about any vehicle. What the installation will involve will depend on whether your E350 is equipped with a trailer connector and what type it is. If you have the factory 7-way trailer connector, it'll be a plug-and-play installation using the # C51322 brake controller harness. The harness plugs in to the connector under the dash near the e-brake pedal (see provided...
    view full answer...
    Image 1 for
  • Parts Needed To Install Curt Assure Trailer Brake Controller C49UR In 2003 Toyota Tundra
    To install the Curt Assure Trailer Brake Controller with Dynamic Screen # C49UR in your 2003 Toyota Tundra with the factory 7-way connector you will need the Curt Custom Wiring Adapter for Trailer Brake Controllers - Dual Plug In # C51362 which will plug into the factory trailer brake controller port underneath the dash of your truck. You will not need the # 9506P as it is used for vehicles that do not have the factory trailer brake controller port. Lastly using the # C51362 will not...
    view full answer...
  • Does Curt Assure Brake Controller Require Level Ground to Configure
    It is recommended to run the configuration of the Curt Assure part # C49UR when you are level ground. I would try to find a parking lot near you that has a level surface and try it there. At worst you should be able to get it really close on unlevel ground but once you find level ground check it there as well. You would not need to reconfigure it with every use. It will store setting unless you cut power to it.
    view full answer...
  • Replacing Tekonsha Brake Controller For a Curt Brake Controller in 2009 Dodge Ram 3500
    The Curt Assure Trailer Brake Controller with Dynamic Screen # C49UR will require a Curt Custom Wiring Adapter # C51332 to connect to your 2009 Dodge Ram 3500 that has a factory plug in connector. Another option is to use a Curt Wiring Adapter for Cequent Trailer Brake Controller Wiring Harnesses # C51520 to adapt the Tekonsha harness to plug into the curt. This will work best if your harness is difficult to get to or your wiring is hardwired and you do not want to have to remake the...
    view full answer...
  • Quick Connect Brake Control Harness for 2020 Jeep Wrangler JL
    Curt doesn't offer a plug-and-play harness for the 2020 Jeep Wrangler with the tow package, but I DO have a solution for you. You'll need to use the Tekonsha version of the harness, part # 3073-P. Cut off the black connector on the # 3073-P harness, and cut off the black connector on the Curt # C49UR Assure brake controller, and wire the controller to the harness, color for color. You'll still retain the quick disconnect function. The # 3073-P harness plugs into the factory connector...
    view full answer...
    Image 1 for
  • Troubleshooting Curt Assure Trailer Brake Controller C49UR Not Going Into Standby/Sleep Mode
    I am sorry to hear your Curt Assure Trailer Brake Controller with Dynamic Screen - 1 to 4 Axles - Proportional # C49UR in your 2006 Toyota Sequoia is not going into standby/sleep mode. I recommend using a circuit tester # 40376 to test the factory trailer brake controller harness and making sure that the stop light switch pin only comes on when you have the brake pedal pressed, and that you have one pin with constant 12v power. If this is the case then the issue is within the Curt...
    view full answer...
  • Can 2006 Ford F-350 with Integrated Brake Controller be Bypassed with Aftermarket
    I spoke with my contact at Tekonsha and he stated that there are two ways that you can install an aftermarket brake controller in a 2006 Ford F-350 with an integrated brake controller. The first way is to hardwire in the controller. The white wire goes to the negative battery terminal, the black wire to the positive battery terminal via a 20 or 30 amp circuit breaker, # 9506P. The red wire connects to the circuit on the brake switch that shows a signal on a circuit tester like, # PTW2993,...
    view full answer...
  • Install Harness for 2016 Ram 1500 to Install Curt Assure Brake Controller
    To install the Curt Assure brake controller part # C49UR in your 2016 Ram 1500 all you need is the correct install harness part # C51458.
    view full answer...
  • Parts Needed to Install Curt Assure Break Controller on a 2022 Ram 1500 Classic
    To install the Curt Assure Trailer Brake Controller # C49UR on your 2022 Ram 1500 Classic you will need the Curt Custom Wiring Adapter for Trailer Brake Controllers # C51458. This adapter is going to allow for quick and simple installation of your electric trailer brake controller with no cutting or splicing required. The custom connectors plug into the built-in port underneath the dash of your vehicle. You can locate the grey, vehicle brake control harness connector to the right side...
    view full answer...
  • Will Curt Assure Brake Controller Be Smoother than Escort Brake Controller
    The Curt Assure brake controller part # C49UR when properly set up will be incredibly smooth unlike what you have now. This controller has an inertia sensor that can tell how hard you are applying the vehicle brakes and applies a proportionate amount of braking pressure on the trailer brakes. To install it in your 2012 Toyota Tacoma you'd just need the install harness part # C51362 which plugs in under the dash.
    view full answer...
  • Brake Controller Recommendation For 2013 Nissan Titan With Factory 7-Way
    There is a brake controller I really like for you 2013 Nissan Titan, and the good news is that since you have the factory 7-way, you don't have to do any installation as your truck is already wired. All you will need is the brake controller and the wiring harness and you're set. With that said, the controller I highly recommend for you is the following: - Curt Assure Trailer Brake Controller with Dynamic Screen # C49UR - Curt Custom Wiring Adapter for Trailer Brake Controllers # C51382 The...
    view full answer...
  • Comparing Curt Assure and Redarc Tow Pro Elite for 2020 Toyota 4Runner
    The Curt Assure part # C49UR and the Redarc Tow Pro Elite part # RED44FR are pretty different in a lot of ways but they are similar in that they are both proportional which means they sense how hard you apply the vehicle brakes and apply a similar amount of trailer braking. Where the Redarc wins is that it installs in a more convenient and out-of-sight location since only a knob installs on the vehicle dash. The Curt is a more traditional brake controller that mounts a "box" on the...
    view full answer...
  • Which Brake Controller Adapter for 2019 Ram 1500 with Tekonsha or Curt Brake Controller
    The plug and play brake controller adapter will vary depending on what brake controller you're using, but if you've got a Tekonsha brake controller like the Prodigy P3 # 90195 then you'll want to use the # 3024-P on your 2019 Ram instead of the # 3021-P that you used on the 2010 Ram. If you're using a Curt brake controller like the Assure # C49UR then you'll want to use the # C51458. If you've got a different brake controller than a Curt or Tekonsha just let me know what brand you're...
    view full answer...
  • Does Curt Assure Trailer Brake Controller Work With 2019 Ram 1500 Classic
    So long as your 2019 Ram 1500 Classic does NOT have the factory brake controller, then yes, you can use the Curt brake controller, and you will also need the correct wiring harness, which I've listed below for you: - Curt Assure Trailer Brake Controller with Dynamic Screen # C49UR - Curt Custom Wiring Adapter for Trailer Brake Controllers # C51458 The Assure is a superb option for a brake controller because it not only gives your trailer smooth braking proportional to that of your...
    view full answer...

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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Lindsey S
Written by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Chris R
Video Edited:
Chris R
Employee Clayton O
Test Fit:
Clayton O
Employee Eric H
Updated by:
Eric H

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