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  1. Trailer Hitch
  2. CURT
  3. Class II
  4. 1-1/4 Inch Hitch
  5. 3500 lbs GTW
  6. Concealed Cross Tube
Curt Trailer Hitch Receiver - Custom Fit - Class II - 1-1/4"

Curt Trailer Hitch Receiver - Custom Fit - Class II - 1-1/4"

Item # C12156
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Trailer Hitch

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Perfect for light-duty towing, this custom, vehicle trailer hitch receiver features fully welded, gloss powder coated steel construction. Drawbar sold separately. Lowest Prices for the best trailer hitch from CURT. Curt Trailer Hitch Receiver - Custom Fit - Class II - 1-1/4" part number C12156 can be ordered online at or call 1-833-496-1390 for expert service.
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  • Reviews (9)
  • Q & A (0)
  • Videos (4)
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  • Why etrailer?

CURT Trailer Hitch - C12156

  • Class II
  • 1-1/4 Inch Hitch
  • 3500 lbs GTW
  • CURT
  • Concealed Cross Tube
  • 350 lbs TW
  • Custom Fit Hitch

Perfect for light-duty towing, this custom, vehicle trailer hitch receiver features fully welded, gloss powder coated steel construction. Drawbar sold separately.


  • Custom fit is designed specifically for your vehicle
  • Precision, robotic welding maximizes strength and improves fit
  • Bolt-on installation - no welding required
    • Complete hardware kit and installation instructions included
  • Lifetime technical support from the experts at
  • Gloss black powder coat finish over protective base coat offers superior rust resistance
  • Sturdy, square-tube design
  • Drawbar, pin and clip sold separately
  • Hitch assembled in the USA
    • Mounting hardware may be imported


  • Receiver opening: 1-1/4" x 1-1/4"
  • Rating: Class II
    • Maximum gross trailer weight: 3,500 lbs
    • Maximum tongue weight: 350 lbs
  • Limited lifetime warranty Technical Support

At we're committed to the products we sell, and to our customers. Our experienced and knowledgeable staff are available via both phone and email to address your questions and concerns for the lifetime of your hitch. The technicians at etrailer perform hitch installations on a daily basis, making them a valuable resource for do-it-yourselfers. The one-on-one, personal service you'll receive comes straight from an expert in the towing and automotive field. We've installed it, we've wired it and we've towed with it, so whatever your question, we can answer it.

12156 Curt Class 2 Trailer Hitch Receiver

Installation Details C12156 Installation instructions

This Product Fits The Following Vehicles

Video of Curt Trailer Hitch Receiver - Custom Fit - Class II - 1-1/4"

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

Video Transcript for Curt Trailer Hitch Receiver Installation - 2020 Mazda CX-9

Shane: Hey everyone, Shane here with Today I have a 2020 Mazda CX9 and I'm going to walk you through how to install the CURT class 2 trailer hitch receiver. This is what our hitch is going to look like once it's installed. The cross tube is completely hidden behind our bumper facia. One thing we really see is our receiver tube. So it's not really taken away from the look of the vehicle.

The hitch is going to be a steel construction, black powder coat finish.So it's going to stay looking nice for a very long time. There are a few other hitches available for this vehicle. There is a CURT Class 3. We're going to have an inch and a quarter by inch and a quarter receiver tube opening. A reinforced collar gives us a little extra stability there.

The hitch pin hole is going to be half-inch in diameter.It's going to take your standard half-inch hitch pin. Hitch pin and clip does not come with this hitch. However, it can be found here at We're going to have rolled steel, safety chain loops, you're going to see a very large opening. It can accommodate different size safety chain hooks.

Having the inch and a quarter by inch and a quarter receiver tube opening, it is going to limit you on different hitch mount accessories.Although it is going to be great for your bike racks and cargo carriers, maybe a small ball mount for a trailer. Bike rack, we don't have to try to load our bikes inside the vehicle. We can load them on the bike rack on the outside and make more room for our passengers. Same goes for the cargo carrier. Maybe we want to put a cargo carrier on here and get some of that cargo from inside, make a little bit more room, we can put it on the cargo carrier on the outside.Now I'm going to give you a few measurements and weight capacities to help you when deciding on any of those hitch mount accessories.

From the center of our hitch pin hole to the outer most part of our bumper is going to be about five inches. That number's important for any of your hitch mounted accessories like bike racks or cargo carriers that may fold up. You want to make sure they're not going to make contact.From the ground to the top innermost part of the receiver tube is going to be about 13 and a half inches. Keep that number in mind for any of those hitch mount accessories that may require a little bit more ground clearance. As far as weight capacities go, we're going to have a 350 pound max tongue weight, which is the downward pressure on the inside of the receiver tube.So when you're loading the cargo carrier or loading the bike rack, you want to make sure you're not exceeding that pressure. We're going to have a 3,500 pound gross trailer weight, which is the trailer plus the load included, that's going to be how much the hitch can pull. I always recommend checking the owner's manual of your Mazda. Make sure the vehicle can withstand that amount of weight. You're going to go with the lowest number between the vehicle and the hitch. Now that we've gone over some of the features, let's walk through how to get it installed.Start your installation. You take a support strap, you can hang it anywhere, I like to go from the Springs. It's a little easy. We're going to go underneath our exhausts. Singe that up. Then, what we're going to do is we're going to remove the rubber isolator from the exhaust where our exhaust will hang and allow us to get our hitch in place.We're going to have a hanger here, we'll spray it now with a little bit of lubrication, soapy water, anything to help that slide off there a little bit easier. We'll have one here on our driver's side. We'll have one towards the front on our driver's side, right in front of our muffler. And then we'll have a fourth one on the passenger side in front of our muffler.Next, we're going to take a pry bar and we're going to pry the the end of our rubber isolator off of the guidepost. And we're going to repeat that same thing for the three remaining hangers. Once we get all four of our isolators off we can use our strap to slowly lower our exhaust down. What we don't want to do is we don't want our exhaust to support itself because it will damage it up towards the front of the vehicle.Next, we need to remove this lower trim piece and the brackets that are holding it in place. You can see a little notch there, we're going to take a trim panel tool, flathead screwdriver, pry out the center, and then pull out the base. That'll allow you to move this panel. This will not be reinstalled.It's hard to see with the camera the two bolts that we have to remove. One's going to be up here and the other one's going to be on the other side. I'll use a 10 millimeter socket to remove those. We made a little clip right there, you can reach up on top, push that in and this will pop out. We're going to repeat that same process for the other one. This will not be reinstalled.Next, we need to install our hardware in our frame rail. We're going to take our pull wire spring side, we're going to start with the forward most hole, we're going to feed the spring in and it's going to come out here. You're going to take your spacer block, slide it on, slide it up into the frame. Take your carriage bolt, thread it onto the spring, pull it up into the hole, and then out there. For this one, it's going to be reverse pull. For the reverse pull, we'll take our spring in, we're going to put on our spacer block, we're going to thread on our carriage bolt. We're going to feed the carriage bolt up into the hole first, followed by the spacer block, and then back down. We're going to repeat that same process on the other frame rail.Now, with an extra set of hands we're going to raise our hitch up into position over the top of our exhaust. Take our pull wires, feed them over the corresponding holes, or feed them into the corresponding holes in the hitch. Removed one of our pull wires on each side, install a hex nut on each side that'll hold our hitch up into position while we install our remaining hardware. And with a three quarter inch socket, we're going to come back, we're going to tighten our hardware and then we're going to torque it to the specifications in the instructions.A good idea when raising your exhaust back up into place, spray the inside of your isolator, it will help just slide on the pin a little bit easier. Once you have your exhaust back up into place, you're going to remove your safety strap and you're ready to go.That's going to do it for the look at and installation on the CURT class 2 trailer hitch receiver on a 2020 Mazda CX9..

Customer Reviews

Curt Trailer Hitch Receiver - Custom Fit - Class II - 1-1/4" - C12156

Average Customer Rating:  5.0 out of 5 stars   (9 Customer Reviews)

Perfect for light-duty towing, this custom, vehicle trailer hitch receiver features fully welded, gloss powder coated steel construction. Drawbar sold separately.

2020 Mazda CX-9

Install is amazingly easy even without a lift. Fish wire makes install a breeze. I love the fact that no cutting or drilling is required kit makes use of existing frame rail mounting holes.


Fit and finish is super. Very easy to install. Great customer service! My bike rack is snug as a bug in this hitch! Very inexpensive for the quality.


Well-designed easy install no problems works very good

2021 Mazda CX-9

Great service.

Still working great…no rust!
Sean - 07/16/2022


This is the second Curt hitch I've purchased and installed on a new vehicle. Both have been excellent quality. I also found the install video provided by etrailer to be very helpful. The install went very smoothly with no surprises. Although the instructions said I needed a helper, with a little creativity and muscle I was able to do it myself. I'm using this hitch primarily for my 1-up USA bike rack. A few months after installing it we took a 1-month 7,000 mile road trip and the hitch was solid as a rock. I'll definitely look to Curt and etrailer when I need my next hitch.

2020 Mazda CX-9

The online video was a great help. Hitch was pretty easy to install, even by myself.
Installed on a 2020 Mazda CX-9 Signature.
Fit is perfect. Thank you !


Perfect fit, good video, easy install


Hitch works great. Install was super smooth thanks to the how-to videos that were sent to me. Great experience.


I have RARELY purchased a product that came with complete and accurate directions. It fit perfectly and was super easy.


See what our Experts say about this CURT Trailer Hitch

  • Hitch Receiver for a Hollywood Racks Sport Rider Bike Rack on a 2022 Mazda CX-9
    Yes, there is a hitch for a 2022 Mazda CX-9. It is the Curt Trailer Hitch Receiver item # C12156. This is a custom fit class II hitch receiver that bolts directly to your Mazda's frame with included hardware. This hitch has a 1-1/4" receiver and will work perfectly with your Hollywood Racks Sport Rider Bike Rack item # HR1000Z-R.
    view full answer...
  • How to Obtain New Mounting Hardware for Curt C12156 Class II Hitch
    We sure do! You'll need part # RHK, which is our replacement hardware kit. On the RHK product page which is linked for you, type in 'C12156' into the provided field and choose 'Curt' from the drop-down menu. This will provide you with all the necessary hardware to install the Curt # C12156 Class II hitch which is a fit for the 2016 - 2021 Mazda CX-9.
    view full answer...
  • Hitch Confirmed to Fit the 2022 Mazda CX-9
    There is a hitch for you. The Curt Trailer Hitch Receiver # C12156 is confirmed to fit all models of the 2022 Mazda CX-9. This hitch is made in the USA, has a bolt-on, no-drill installation and will provide you with a Class II, 1-1/4" hitch receiver for hitch mounted accessories such as bike racks, cargo carriers and ball mounts. If you are looking for a hitch for a bike rack and do not already have a rack. The Hollywood Racks TRS Bike Rack for 2 Bikes # HR3000 is a great choice. This...
    view full answer...

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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Lindsey S
Edited by:
Lindsey S
Employee Jacob T
Video Edited:
Jacob T
Employee Chris R
Video Edited:
Chris R
Employee Chelsea B
Written by:
Chelsea B
Employee Wilson B
Updated by:
Wilson B
Employee Kristina F
Updated by:
Kristina F
Employee Isabelle B
Updated by:
Isabelle B
Employee Shane H
Test Fit:
Shane H
Employee Robert C
Test Fit:
Robert C
Employee David F
Test Fit:
David F
Employee Jonathan Y
Video by:
Jonathan Y
Employee Michael B
Video by:
Michael B

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