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BetterWeigh Mobile Tongue Weight and Payload Scale for OBD II - Bluetooth

BetterWeigh Mobile Tongue Weight and Payload Scale for OBD II - Bluetooth

Item # C51701
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Curt Hitch Tools - C51701
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Monitor your towing weight using your smartphone. Bluetooth receiver pairs with companion app to display tongue weight, pin weight, payload, and gross combined weight of your load. Receiver plugs into the OBD-II port on your vehicle. Lowest Prices for the best tools from Curt. BetterWeigh Mobile Tongue Weight and Payload Scale for OBD II - Bluetooth part number C51701 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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Curt Tools - C51701

  • Hitch Tools
  • Measuring Devices
  • Tongue Weight Scale
  • Curt

Monitor your towing weight using your smartphone. Bluetooth receiver pairs with companion app to display tongue weight, pin weight, payload, and gross combined weight of your load. Receiver plugs into the OBD-II port on your vehicle.


Features:

  • Scale monitors your towing setup's important load measurements
    • Calculates tongue weight, pin weight, payload, and gross combined weight
    • Lets you know if you need to adjust your load before you tow or haul
    • Eliminates the need for separate or commercial scales
  • Weight distribution feature lets you verify weight distribution system is set up properly
    • See how weight is distributed across axles so you can make adjustments when needed
  • Receiver unit wirelessly transmits towing information to your smart device
    • Connects via Bluetooth for operation
    • Displays weight information through mobile app on your smartphone
  • Fast, plug-and-play installation makes setup a breeze - no tools required
    • Plug unit into the OBD-II port on your vehicle
    • Download free app to your phone and then calibrate
  • Preset calibrations let BetterWeigh automatically pull vehicle specifications using VIN
    • 5-10 Minute guided manual calibration process available for vehicles made before 2008 or vehicles with modified suspension


Specs:

  • Application: vehicles 1996 and newer
    • Weigh GCW feature requires an automatic transmission
  • Smart device OS requirements:
    • Apple (iOS): 10.3 or higher
    • Android: 6.0 Marshmallow and higher, Bluetooth enabled
  • Limited lifetime warranty


The days of weighing your trailer with a bathroom scale and construction site materials are long gone. Measuring pin weight and payload no longer requires a visit to a crowded weigh station. Avoid the hassle and get all of the needed weight measurements sent directly to your smartphone. This little device does the work for you to provide peace of mind and promote safe hauling.


BetterWeigh is a compact device that easily plugs into your vehicle's OBD-II port and uses vehicle-specific data to measure and monitor your tongue weight, pin weight, payload, and gross combined weight in real time. Whether you're pulling a trailer behind your truck or you've loaded down your SUV's cargo carrier, it's important that you don't exceed the weight ratings of your vehicle or hitch. And BetterWeigh makes it easy to avoid doing so.


Simple, Guided Setup

Setting up BetterWeigh is easy. First, plug the unit directly into your vehicle's OBD-II port, which is typically found beneath the steering column. Open the free BetterWeigh app on your compatible smart device and follow the step-by-step instructions for pairing BetterWeigh to your smartphone via Bluetooth.


Next, the app will prompt you to scan your vehicle's VIN to search BetterWeigh's vast preset calibration database. Many vehicles made in 2008 or later will have preset calibrations. If no preset calibrations are available, the app will guide you through a brief manual calibration process to ensure accurate weight readings.


Manual Calibration for Older or Modified Vehicles

Vehicles older than 2008 or those with modified suspensions may have to be manually calibrated. Follow the guided, in-app instructions to manually calibrate BetterWeigh to your vehicle.

First, enter in your vehicle's curb weight. This can be found on the sticker on the inside of your door or in your owner's manual.


Next, you'll want to find an empty parking lot where you can perform 15 to 20 test runs. For each run, accelerate to 15 mph at varying throttle - this will ensure accuracy under different conditions. Manual calibration only takes about 5 to 10 minutes to complete.


How BetterWeigh Works

OBD-II ports became standard in most vehicles in 1996. This port makes it easy to access your vehicle's computer for diagnostics and emissions testing. The amount of vehicle data available via the OBD-II port has increased over the years, allowing BetterWeigh to tap into the specific data needed to determine weight. Sophisticated algorithms, along with an on-board accelerometer, are then used to calculate real-time weight with superior accuracy within 5%.


How it Works

Let's travel back to high school physics class for a moment. As you may recall, Newton's Second Law of Motion states that the force of an object in motion is equal to the mass of the object multiplied by its acceleration. So, to determine the mass of an object - in this instance, your rig - we just have to take the force and divide by acceleration.


Acceleration is easy enough to determine thanks to the triaxial accelerometer built into the BetterWeigh. Determining the force is a bit more complicated. Basically, BetterWeigh pulls data about your transmission from your vehicle's computer and then uses a customized torque converter model to determine the powertrain effort.


Once the overall mass of your setup is determined, the BetterWeigh will convert this to a weight. Then, to determine your trailer's fully loaded weight, the unit subtracts your vehicle's weight from the weight of the overall setup.


Weights Measured by BetterWeigh


Tongue Weight

It's important to monitor tongue weight and adjust your load when necessary to ensure that you stay within the rated capacity for your setup. Simply put, too little tongue weight can cause trailer sway and too much tongue weight can cause your tow vehicle to perform poorly. You may have difficulty steering, gaining traction, or braking when driving a setup that has too much weight pushing down on the rear of the vehicle. Ultimately, towing with an improper tongue weight can cause you to lose control of your vehicle or cause your trailer to separate from the vehicle. Tongue weight should be approximately 10% to 15% of your gross trailer weight (GTW).


Pin Weight or Vertical Load

If you're towing a fifth-wheel or gooseneck trailer, BetterWeigh will calculate the pin weight or vertical load. This is the downward force exerted by the trailer onto your truck bed. Like with tongue weight, knowing this measurement helps you to ensure that your trailer is properly loaded. An improperly loaded trailer is the number 1 cause of sway. Maintaining a proper pin weight will limit trailer sway and improve handling. This weight should be about 20% to 25% of your GTW.


Payload

Payload is important to monitor as well. This is the weight of both the cargo and passengers in your vehicle. Do not exceed your truck's gross vehicle weight rating (GVWR).


The BetterWeigh measures payload in real time, so you can see how every piece of cargo affects your load. This is great for estimating load charges or determining if your truck bed camper is overloaded.


Gross Combined Weight

BetterWeigh measures your rig's gross combined weight to ensure that you're not hauling more than your vehicle and hitch are rated for. To do this, the unit subtracts your vehicle's curb weight from the overall weight of your setup to provide the weight of your trailer.


Knowing your gross combined weight is also helpful to determine whether you can drive over bridges with weight limits.


Weight Distribution

The weight distribution feature measures weight across your vehicle's axles to verify whether your weight distribution system is set up properly. An unbalanced load or improperly installed system can cause dangerous sway conditions.


BetterWeigh does the work for you so you don't have to use a tape measure and do manual calculations when setting up your weight distribution hitch.



51701 Better Weigh Wireless Trailer Tongue Weight Scale, Payload and Pin Weight Scale

Replaces HG103 Haul Gauge Tongue Weight Scale

Installation Details C51701 Installation instructions



Video of BetterWeigh Mobile Tongue Weight and Payload Scale for OBD II - Bluetooth

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Curt BetterWeigh Mobile Tongue Weight and Payload Scale Review

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Ask the Experts about this Curt Tools

  • Should Tongue Weight be Measured When Choosing Weight Distribution
    I definitely recommend finding your trailer's tongue weight when choosing a weight distribution system. You need to have the trailer loaded like it will be when you're towing it and you also need to add in any weight you put behind the rear axle of the tow vehicle because this counts as tongue weight when it comes to weight distribution. Since you don't have a scale that measures high enough I recommend the BetterWeigh from Curt, part # C51701. It plugs into the OBD-II port and uses...
    view full answer...
  • What Brand of Vehicles Will the BetterWeigh Mobile Tongue Weight and Payload Scale Work On
    The BetterWeigh Mobile Tongue Weight and Payload Scale part # C51701 will work on any vehicle made on or after 1996 sold in the USA. The brand such as Ford, Toyota, BMW etc. does not matter since all vehicles made on or after 1996 sold in the USA would have been required by law to come with an OBD-II port which is essentially a way to read the vehicle's computers.
    view full answer...
  • Will the Haul Gauge Work with Factory Auto Leveling Air Suspension
    The Curt BetterWeigh Mobile Tongue Weight and Payload Scale for OBD II - Bluetooth part # C51701 will work on your Ram 3500 air suspension. For it to be as effective and accurate as possible with the factory air ride you will need to switch the leveling system into "tire-jack" mode. This mode essentially shuts the system off then with the system switched off you can go through the full process of obtaining your various weights. After you've got everything properly balanced weight wise...
    view full answer...
  • Does Curt BetterWeigh Mobile Tongue Weight & Payload Scales Require Plugging into OBD-II
    The BetterWeigh Mobile Tongue Weight and Payload Scale for OBD-II # C51701 does require the use of your OBD-II port; and though there is no way to get around it, this scale it is still going to be usable for you. The reason is you only need to plug the BetterWeigh scale into your OBD-II before you set off. You will be able to get your tongue weight and payload and then you can unplug it from your OBD-II and plug your performance monitor back in and you'll be set.
    view full answer...
  • Does Tow/Haul Mode of Truck Affect Performance of BetterWeigh C51701
    Tow haul mode does not affect the performance of the BetterWeigh part # C51701 since most of the measurements it takes are below 10 mph which is before tow/haul mode affects anything.
    view full answer...
  • Can BetterWeigh be Used to Make Sure Vehicle Towing Capacity Isnt Exceeded
    The BetterWeigh part # C51701 that you referenced will allow you to know exactly how much tongue weight and total trailer weight you'll be towing so that you can safely stay under your towing capacity. Hopefully your plan is to tow with the trailer below the max weight you listed of 10,500 lbs as we can't recommend you exceed your Tundra's towing capacity even if it's only by 400 lbs. I attached a review video for this for you to check out as well.
    view full answer...
  • Can BetterWeigh Suspension Enhancement be Used on Truck with Suspension Enhancement
    Yes, the BetterWeigh part # C51701 can be used on vehicles with suspension enhancement like yours but you do need to run it through a manual calibration and you'd be set. It's a very short and easy process that the # C51701 will guide you through. To calibrate, go to Settings (gear symbol) -> Calibration -> Suspension Weighing. The app will guide you through a 2 minute process where you open the tailgate and sit on the back of the truck. From other users we have learned (to be accurate)...
    view full answer...
  • Will The BetterWeigh Work With Diesel Vehicles
    The BetterWeigh Mobile Tongue Weight and Payload Scale for OBD II - Bluetooth part # C51701 works with Diesel vehicles that are 2004 or newer so it is not a fit for the 1999 F-350 diesel. We do carry the Sherline Trailer Tongue Weight Scale - 2,000-lb Capacity part # 5780 which I know is not as cool as the BetterWeigh but works to read the tongue weight of your setup.
    view full answer...
  • Does the Orientation of OBDII Port on Vehicle Affect Performance of BetterWeigh C51701
    BetterWeigh part # C51701 works in any orientation, and is programmed to recognize the orientation. In fact, in a case like your Toyota Land Cruiser BetterWeigh will ask you to verify the orientation when you first setup and launch the BetterWeigh app.
    view full answer...
  • Will BetterWeigh Mobile Tongue Weight Scale Work on 2014 Jeep Grand Cherokee With Auto Leveling
    The main weight feature of the Curt BetterWeigh Mobile Tongue Weight and Payload Scale for OBD II # C51701 will work on your 2014 Jeep Grand Cherokee with auto leveling. However, according to Curt you do need to turn off the auto-leveling feature of your Grand Cherokee: "The other functions (Payload, Tongue Weight, Pin Weight, and Weight Distribution) use vehicle pitch, so they will not function properly unless auto-leveling is turned off. This is usually done in the vehicle’s console...
    view full answer...
  • Is BetterWeigh Mobile Tongue Weight and Payload Scale Compatible with Toyota Vehicles
    I reached out to my contact at Curt and he said that the pairing issue with Toyotas has indeed been fixed. In fact my contact was the very person who worked on this. As of May 2019 there are no longer any problems between the BetterWeigh # C51701 and the computer systems on Toyota vehicles.
    view full answer...
  • When Using BetterWeigh For Multiple Vehicles Does It Need to be Calibrated Every Time
    I reached out to my contact at Curt regarding the Mobile Tongue Weight and Payload Scale # C51701. The first thing he wanted me to note is that while there is a better chance that pre-2008 model vehicles will need to be manually calibrated when plugging in the unit it's certainly not guaranteed. There's still a decent chance that the BetterWeigh will be able to automatically pull vehicle information as soon as it's plugged into the OBD II port on both your 2001 Ranger and 2008 Lincoln...
    view full answer...
  • Will BetterWeigh Mobile Tongue Weight and Payload Scale Work on 2018 Honda Ridgeline
    Yes, the BetterWeigh Mobile Tongue Weight and Payload Scale # C51701 will absolutely work on your 2018 Honda Ridgeline. This will plug right into the truck's OBD II port and gather vehicle information using the VIN. You can also manually make calibrations if needed to accommodate for any aftermarket components that you may have added.
    view full answer...
  • Can BetterWeigh Mobile Tongue Weight and Payload Scale part # C51701 Work on 2019 Ram 1500
    Yes, the weight function of the BetterWeigh Mobile Tongue Weight and Payload Scale part # C51701 will function just fine with your 2019 Ram's auto-leveling air suspension. The other functions (Payload, Tongue Weight, Pin Weight, and Weight Distribution) use vehicle pitch, so they will not function properly unless auto-leveling is turned off. This is usually done in the vehicle’s console by putting the vehicle into “tire jack mode,” which must be turned off before driving.
    view full answer...
  • Will BetterWeigh Mobile Tongue Weight Scale Work on Vehicle with Aftermarket Modifications
    I reached out to my contact at Curt regarding the Mobile Tongue Wight and Payload Scale # C51701 and he said the aftermarket suspension and larger-than-stock tires on your FJ Cruiser will not present any issues. The BetterWeigh does plug into the OBD-II port to read vehicle data but it can be manually calibrated to account for aftermarket components like what you have. This will allow it to give you accurate readings based on your specific vehicle configuration. I have attached a short...
    view full answer...
  • Does The BetterWeigh Tongue Weight Payload Scale Measure Weight On The Tow Vehicle Axles
    The BetterWeigh Mobile Tongue Weight and Payload Scale part # C51701 will weigh the truck without the camper connected and with the camper connected to tell if you are going over the gross combined weight rating of your vehicle with the trailer attached. It will also tell you the payload weight in the vehicle (the weight of both the cargo and passengers) and the tongue weight. However, the BetterWeigh does not determine physical weights on the axles. It does have a weight distribution feature...
    view full answer...
  • Can the BetterWeigh Monitor Different Functions of Tow Vehicle
    I do have a solution for you to keep an eye on various stats for your 2008 Chevy Tahoe while you're towing but the BetterWeigh Mobile Tongue Weight and Payload Scale # C51701 is only designed to determine weight ratings for your towing setup and it doesn't have the ability to sense and display anything else. If you are only wanting to monitor those things then I recommend using the Edge Insight CTS2 # EP84130 which is a monitor system with a touch screen for easy navigation. This product...
    view full answer...
  • Will BetterWeigh Mobile Tongue Weight Scale Work on More Than One Vehicle
    I reached out to HaulGauge to ask about using the HaulGauge Mobile Tongue Weight and Payload Scale for OBD II - Bluetooth # C51701 on multiple vehicles in the manner you asked and they told me you can use the scale with multiple trucks: "in most cases this is easiest using multiple phones. The BetterWeigh app stores the vehicle’s VIN and any calibrations. If you move the HaulGauge to another vehicle, you will have to go into Settings (gear symbol) -> Change Vehicle. This will erase any...
    view full answer...
  • Can BetterWeigh Be Used on Truck with Air Bags or Auto Level Suspension
    Yes, the BetterWeigh Mobile Tongue Weight and Payload Scale # C51701 will absolutely work on your 2015 GMC Sierra 2500 that's equipped with air bag suspension. The BetterWeigh will use information from the Sierra's module and VIN but you are also able to make manual adjustments/calibrations to accommodate features like this. When initially calibrating the unit you will just want to drop the air bags down to their lowest level (typically 5 to 10 psi) or turn the auto-level feature off...
    view full answer...
  • What Sensors Does BetterWeigh C51701 Use to Determine Weight
    BetterWeigh measures weight by monitoring powertrain effort and vehicle acceleration. Powertrain effort is calculated from a torque converter model. BetterWeigh # C51701 uses the VIN of your vehicle to search its database for the correct torque converter calibration. If BetterWeigh doesn’t find a calibration within the database, the app will guide the user through a calibration. Acceleration is determined using a triaxial accelerometer on-board BetterWeigh. When powertrain effort is...
    view full answer...
  • Can the BetterWeigh C51701 be Used with a Motorhome
    You can use the BetterWeigh part # C51701 on a motorhome but you will need to run through the manual calibration procedure since motorhome constructions are all bit different yet use a standard chassis which will be what the VIN pulls up with the BetterWeigh.
    view full answer...
  • Will BetterWeigh Tongue Weight Scale Work on Motorhome and How Does It Receive Information
    Yes, the BetterWeigh Mobile Tongue Weight and Payload Scale # C51701 will work on a motorhome that's towing a vehicle. This unit plugs into the vehicle's OBD II port and does indeed gather information based on its VIN. With that being said you can also manually calibrate the system if the vehicle you are using it on is equipped with aftermarket components that affect the stock numbers or if you simply know that the listed stock numbers aren't quite accurate for whatever reason. The...
    view full answer...
  • Can BetterWeigh be Used on a Truck with a Manual Transmission
    Some of the features can work with the BetterWeigh part # C51701 on manual transmission vehicles but not all of them. The tongue weight, weight distribution, payload features, and pin weight features will work but the total vehicle and trailer weight features will not due to the lack of a torque converter like you mentioned.
    view full answer...
  • How Does HaulGauge Mobile Tongue Weight and Payload Scale Work?
    The Better Weight Mobile Tongue Weight and Payload Scale for OBD II - Bluetooth # C51701 simply reads your vehicle information and lets you know the parameters outlined by the manufacturer for safe towing of your specific vehicle. It then calculates weights based on force divided by acceleration. I've attached a photo to help with the manufacturer's explanation. BetterWeigh measures weight by monitoring powertrain effort and vehicle acceleration. Powertrain effort is calculated from...
    view full answer...
  • Is There a Difference Between Curt BetterWeigh and HaulGauge Mobile Tongue Weight Scales
    The two parts you mentioned are literally exactly the same thing just with different branding. I highly recommend going with the Curt BetterWeigh Mobile Tongue Weight and Payload Scale for OBD II # C51701 because of its lifetime warranty.
    view full answer...
  • Can BetterWeigh Mobile Tongue Weight and Payload Scale for OBD II Be Used on More than One Vehicle
    Yes, you can use the BetterWeigh part # C51701 on more than one vehicle. It requires programming the phone you use it with to the vehicle so if you plan to switch between vehicles frequently it will be easiest if you use two phones or devices so that you aren't reprogramming the VIN info etc.
    view full answer...
  • Can BetterWeigh Mobile Tongue Weight and Payload Scale Be Used on 2015 Honda Odyssey
    Yes, the BetterWeigh Mobile Tongue Weight and Payload Scale for OBD II # C51701 will work great with your 2015 Honda Odyssey! It is not limited to only working on trucks and would work great for your Odyssey.
    view full answer...
  • Will BetterWeigh Tongue Weight Scale Work on Vehicle With Suspension Enhancement
    Yes, the BetterWeigh Mobile Tongue Weight and Payload Scale # C51701 will work on your 2018 Ford F-350 with SumoSprings such as the # SSR-127-54 that fit your truck. They say: "The main Weigh feature, which weighs the vehicle and anything attached to it, will function just fine with bump stop suspension enhancements. The other functions (payload, tongue weight, pin weight, and weight distribution) use vehicle pitch, so a short calibration will be required." This is just a...
    view full answer...
  • Does BetterWeigh Scale Save Calibrations for Use Between Two Vehicles
    The BetterWeigh Mobile Tongue Weight and Payload Scale # C51701 does save the calibrations. When I reached out to HaulGauge, this is what they told me: "The BetterWeigh app stores the vehicle’s VIN and any calibrations. If you move the BetterWeigh to another vehicle, you will have to go into Settings (gear symbol) - Change Vehicle. This will erase any custom calibrations and find the new vehicle’s information.  If your vehicle is in our calibration database, changing vehicles will...
    view full answer...
  • Can BetterWeigh Mobile Tongue Weight Scale part # C51701 Be Used with Suspension Enhancement
    Suspension enhancement like the Timbren kit you have installed on your 2019 Ford F-250 will affect the numbers of the BetterWeigh # C51701. According to them a manual calibration would be required with this setup and that the Timbren would need to touch axle plus a set weight to calibrate. Here are the instructions they gave us for how to do this: BetterWeigh measures pin weight using the pitch of the vehicle. Because your suspension is not stock, a short calibration will be required....
    view full answer...

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Notes: May have damaged packaging or minor cosmetic blemishes.

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Info for this part was:

Expert Research:
Mike L
Expert Research:
Jameson C
Edited by:
Lindsey S
Video Edited:
Jacob T
Video by:
Dustin K
Installed by:
David F
Written by:
Kristina F

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