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  1. Trailer Coupler Locks
  2. CURT
  3. Fits 2 Inch Hitch
  4. Surround Lock
  5. Aluminum
  6. Keyed Unique
Curt Trailer Hitch Receiver and Coupler Lock Set - 2" Hitches - 2" or 2-5/16" Ball

Curt Trailer Hitch Receiver and Coupler Lock Set - 2" Hitches - 2" or 2-5/16" Ball

Item # C23088
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Trailer Coupler Locks
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Kit includes a sturdy aluminum coupler lock to prevent towaway theft, an adjustable 1/4" diameter latch lock to ensure that your trailer won't be unhooked from the coupler, and a trailer hitch receiver lock that fits 2" hitches. Lowest Prices for the best trailer coupler locks from CURT. Curt Trailer Hitch Receiver and Coupler Lock Set - 2" Hitches - 2" or 2-5/16" Ball part number C23088 can be ordered online at or call 800-298-1624 for expert service.
  • All Info
  • Reviews (37)
  • Q & A (0)
  • Photos
  • Why etrailer?

CURT Trailer Coupler Locks - C23088

  • Fits 2 Inch Hitch
  • Surround Lock
  • Aluminum
  • Keyed Unique
  • CURT
  • Universal Application Lock

Kit includes a sturdy aluminum coupler lock to prevent towaway theft, an adjustable 1/4" diameter latch lock to ensure that your trailer won't be unhooked from the coupler, and a trailer hitch receiver lock that fits 2" hitches.


  • 3-Piece lock set deters theft of your trailer
  • Keyed-alike locks make it easy to lock and unlock your setup
    • Includes 2 keys
  • Coupler lock deters trailer theft by fitting over the coupler, preventing hookup
    • Designed for use when trailer is not in tow
    • Prevents a trailer ball from being inserted into the coupler
    • Easy, quarter-turn lock activation
  • Coupler latch lock keeps others from unhooking your trailer after it's hooked up
    • Adjustable lock with 5 locking positions fits wide variety of coupler latch sizes
  • Hitch receiver lock is used in place of standard pin and clip
    • Helps prevent theft of your ball mount or hitch-mounted accessory
    • Locking cap threads onto the pin
  • Covers on hitch receiver lock and coupler latch lock help keep water and dirt out of the lock cylinders
  • Durable construction with corrosion-resistant finishes
    • Hitch lock and latch lock are steel with chrome plating
    • Coupler lock is aluminum with anodized finish
  • Assembled in the USA


  • Trailer coupler lock:
    • Application: trigger-style latch coupler with straight lip for 2" or 2-5/16" ball
  • Adjustable trailer coupler latch lock:
    • Application: trigger-style latch (or lever-style latch) ball couplers
    • Inside pin length (span): 1/2" - 2-1/2"
    • Pin diameter: 1/4"
  • Hitch receiver lock:
    • Application: 2" x 2" trailer hitches (Class III and Class IV)
    • Pin diameter: 5/8"
    • Inside pin length (span): 2-5/8"
    • Overall length: 6"
  • 1-Year limited warranty

coupler lock dimensions

Your towing setup has numerous places that could be compromised by would-be thieves. Arm your setup with this set of locks from Curt. The kit contains all the locks you need to guard your setup from theft, including a coupler lock, a coupler latch lock, and a hitch receiver lock. Each lock is keyed-alike, which means the same key will lock and unlock all of them so that you only have to keep track of one set of keys to make sure your trailer is safe.

23088 Curt Hitch and Coupler Lock Set for 2" and 2-5/16" Flat Lip Couplers

California residents: click here

Customer Reviews

Curt Trailer Hitch Receiver and Coupler Lock Set - 2" Hitches - 2" or 2-5/16" Ball - C23088

Average Customer Rating:  4.6 out of 5 stars   (37 Customer Reviews)

Kit includes a sturdy aluminum coupler lock to prevent towaway theft, an adjustable 1/4" diameter latch lock to ensure that your trailer won't be unhooked from the coupler, and a trailer hitch receiver lock that fits 2" hitches.

- C23088

This set worked as claimed, our trailer did not get stolen, and it was not too expensive.

- C23088

Awesome product, quick shipping, keeps trailer locked and secured and I have no worries leaving it parked

- C23088

They are easy to use, especially since they are all keyed alike. I added wheel X-chocks with locks between my tandem axle wheels for added security. I don't know if all these locks have discouraged anyone from trying to steal our trailer, but it can't hurt to make it look as difficult and inconvenient as possible. Plus, you try to park in open, high visible areas when possible. They do help my peace of mind when I have to leave my trailer for any time.

Still using them. I saw where someone tried to pry the hitch lock with a crowbar. It doesnt look like they tried very hard. Maybe something scared them off or maybe they noticed the wheel chocks and quit trying, I dont know. The main thing is they didnt get our trailer! The more locks, the better!
Bill - 06/22/2019

- C23088

I have 2 trailers so I ordered 2 sets. They work great, just what I needed. Also Heather was awesome. I placed the order with her over the phone, she sent me all the information concerning shipping and followed up with me when they arrived. I look forward to doing business with etrailer in the future.

Hey, the two trailer couplers I ordered are working just fine. I havent had any issues with them. They are just what I needed for my trailers.
Allen R - 05/07/2018

- C23088

Great company to deal with - service and information.

- C23088

The trailer hitch lock did not fit my Airstream trailer hitch so it was useless although the other two fit the only one I have even a little confidence about is the one that holds the ball portion of the hitch to the vehicle. The other that keeps the ball attached to the trailer is only good for that purpose as it could be broken easily and removed so for security purposes almost useless.

- C23088

Latch pin and receiver pin lock are top quality items. 3 stars because the tongue cover slides right off of my trailer so it is a useless item for my trailer!

- C23088

I just tried the lock kit. The hitch pin that holds the receiver on to my vehicle is not long enough for my 2008 Sequoia or my 2013 tundra. What are the options on this?

The Toyota OEM trailer hitch uses thicker walled tubing for the hitch receiver which prevents this hitch lock from working. The # RH5-XL
Trailer Hitch Receiver Lock - Extra Long - Flush Design for 2-1/2" Trailer Hitches
is long enough to accommodate the extra width, and would work well.
-- Etrailer Expert Mike L - 11/09/2018

- C23088

Have had this lock for a year now. All 3 pieces are working just fine. Even the rubber cover over the keyhole is still there and fits like a glove, usually the strap breaks and the cover gets lost. Not on this bad boy! Have used this on 2 different trailers, sure is nice having one key.

- C23088

Awesome! Awesome! Awesome! Super fast! Well packed! Received in 24 hours!!! Each item was received undamaged and as described in perfect condition!! I very highly recommend eTrailer!!

- C23088

trailers sits most of the year, hitch is good easy to put inane off

- C23088

Nice to have a single key for everything. Coupler locks work great. The receiver lock is too short for my 2008 Toyota Sequoia hitch, so I can't use it. Make sure you measure all your hitch pieces before ordering. Quality feels good.

- C23088

Box arrived torn open on both ends. Hardware bag was open. Everything seems to be here but I will know better after installing

- C23088

Great way to ensure your “stuff” stays where you want it or put it. Easy to use.

Mike - 12/09/2018

- C23088

I am delighted with the service that I have received from all of the sales people at etrailer. Everyone has been very helpful and has stayed in touch. The product arrived right on time and is exactly what I needed. I would recommend etrailer to anyone. You will not be disappointed.

- C23088

I ordered this and it arrive before I knew it I think it might've taken three days not release sure I love the fact that one key unlocks all three perfect fit for my camper and a hook onto my trailer on my truck and it's nice having one key thank you so much.

- C23088

Lock kit came quickly even with economy shipping. Seam like very good quality. I like the fact everything is keyed alike makes using it less of a chore. This was my second order, have been impressed with products and service.

- C23088

Just received the product today. Initial inspection revealed quality of the product, and ease of use. Everything fit perfectly. Would recommend this product and your company

Everything still working. Holds up to weather great.
Thomas - 11/21/2018

- C23088

etrailer is awesome - high quality products, easy transactions, and great customer service - Shipping was perfect as well!!

- C23088

I am extremely please with my Lock set for my Trailer and Hitch.

- C23088

I ordered the wrong size for my coupler- returned the wrong size quickly. Received the replacement- fits great and looks great! Thanks for the prompt customer service!

- C23088

Nice fit. All pieces work well. A couple of extra keys would be nice. Came with 2, but with the security offered, it would be nice to have some hidden or reserve keys set aside to avoid destroying stuff. Still, a good product at a very reasonable price.

- C23088

I enjoy the product on a daily bases. Works great and I really like the same fits all part, thanks

100 happy with the items I have.
Donald A - 12/12/2018

- C23088

Worked just as advertised

- C23088

FAST delivery and seems to be made of quality parts! Smooth key operation and installation. Thank you Richard F

Show More Reviews

Ask the Experts about this CURT Trailer Coupler Locks

  • Recommended Locks for Trailer That Are Keyed Alike
    To get multiples of all of those parts keyed alike is not an option. To get them keyed alike for one trailer/truck however is an option. I recommend the Curt Trailer Hitch Receiver and Coupler Lock Set - 2" Hitches - 2" or 2-5/16" Ball # C23088 for that application. Multiples of this part number will each be keyed differently.
    view full answer...
  • Coupler Lock and Trailer Hitch Receiver Lock That are Keyed Alike
    There is a combination coupler lock and hitch receiver lock which can be keyed alike though the Atwood AT89017 and AT89011 cannot. Instead, you can use the Curt Trailer Hitch Receiver and Coupler Lock Set - 2" Hitches - 2" or 2-5/16" Ball # C23088. I've added links to a pair of video reviews of these locks for you to take a look at.
    view full answer...
  • Will The etrailer Hitch And Coupler Lock Set - 2" Hitches Work With A 2" Ball Mount
    Yes, the Curt Trailer Hitch Receiver and Coupler Lock Set - 2" Hitches - 2" or 2-5/16" Ball, part # C23088, will work with a 2" ball. It prevents a trailer ball from being inserted into the coupler of your unattended trailer. A coupler lock and a locking hitch pin are also included. The combination of all three will keep your trailer safe. I have included a demo video link below.
    view full answer...
  • Will The Curt Trailer Hitch Receiver and Coupler Lock Set Fit A 2009 Toyota Tundra Hitch?
    Yes. The Curt Trailer Hitch Receiver and Coupler Lock Set, # C23088, will fit your 2009 Toyota Tundra with 2 inch trailer hitch receiver. You will not need an extra long lock. I've attached some videos for you of this lock and it's function. The coupler lock will secure your trailer when unconnected, the coupler latch lock will secure your trailer when connected, and the hitch lock will secure your ball mount to your hitch. These three locks are key-alike and this kit comes with two...
    view full answer...
  • What Replacement Keys do You Have for My Curt Trailer Coupler Lock?
    I have an answer for you about replacement keys. Unfortunately, I confirmed with my contact at Curt that they do not carry replacement keys for their coupler locks. With that being said, the best route is to purchase a new lock like the Curt Trailer Hitch Receiver and Coupler Lock Set - 2" Hitches - 2" or 2-5/16" Ball # C23088 or the Curt Trailer Hitch Receiver and Coupler Lock Set - 2" Hitches - 1-7/8" or 2" Ball # C23086.
    view full answer...
  • Difference Between Curt & etrailer Coupler & Hitch Lock Set
    I can go over the differences in the locks for you, though real quick I do have to note that we wouldn't have any way of knowing what coupler locks fit any specific trailer like your Jayco (locks fit coupler types as opposed to trailers). That said, let's go over the differences. The etrailer Hitch and Coupler Lock Set - 2" Hitch - 2-5/16" Ball # e68ZR is only a fit for a 2-5/16" ball coupler, while the ball coupler can be either 2" or 2-5/16" on the Curt Trailer Hitch Receiver and Coupler...
    view full answer...
  • Compatibility of Curt C22321 Anti-Rattle Device w/ Curt C23088 Receiver and Trailer Coupler Lock Kit
    I'd recommend using a different anti-rattle solution like # RM-061, which would be compatible with the lock kit.The # C22321 Curt Anti-Rattle pin wouldn't work in conjunction with the Curt # C23088 lock set that you'd mentioned, becasue the # C222321 is actually a threaded hitch pin. If that were used, you couldn't use the hitch lock inlcuded in the lock kit. I've linked you to a video showing how the # RM-061 anti-rattle device works.
    view full answer...
  • Can Keys for Curt Trailer Locks be Duplicated
    A locksmith could duplicate the keys used for Curt trailer hitch locks # C23088. Since your business uses cargo trailers you might also be interested in tracking devices such as the Linxup GPS Vehicle Tracking Device # 300-AT3-S. So if a trailer is ever stolen you will be able to find it and bring the thieves to justice! I have linked a video for you.
    view full answer...
  • Recommended Weight Distribution and Anti-Sway System For 2004 Range Rover And 7500 GVWR
    For a weight distribution system with anti-sway, you want to look at the total tongue weight of you vehicle and trailer. The total tongue weight is the loaded tongue weight of your trailer combined with any cargo weight behind the rear axle of your towing vehicle. For your 2004 Range Rover, that would be your cargo area when loaded. Your trailer tongue weight when loaded is normally between 10 and 15% of your total trailer weight. With this in mind and considering for some cargo weight...
    view full answer...
  • Multi-Fit Coupler Lock That Can Be Ordered Keyed-Alike
    Reese Tow and Store Lock Kit # RP7014700 is not offered with the keyed-alike option but we do have many similar lock products that are, such as Fastway Universal Trailer Coupler Lock # DT25013KA. You can select the keyed-alike feature on the item's page, just above the add to cart button.
    view full answer...
  • Recommended Trailer Coupler Locks Keyed Alike for Multiple Trailers
    The Master Lock Trailer Hitch Receiver Lock and Coupler Lock Set - 1-1/4" and 2" Hitches # 3794DAT does not allow for a keyed alike option at all. For a keyed alike option, I recommend the Fastway Universal Trailer Coupler Lock for 1-7/8", 2" and 2-5/16" Couplers # DT25013KA if you just need the coupler locks. To order multiples, select keyed alike and then adjust the quantity before adding to cart. If you need coupler and trigger locks keyed alike then I recommend the Curt Trailer...
    view full answer...
  • Recommended Keyed Alike Coupler, Latch and Hitch Pin Locks
    Instead of the Curt # C23088, which is not available keyed alike with any other products, I recommend using the etrailer Hitch and Coupler Lock Set - 2" Hitch - 2-5/16" Ball - Keyed Alike # e68ZR. This comes with the coupler lock, a latch lock and a locking hitch pin. Then you can add as many additional locking hitch pins as you might need keyed alike with the etrailer Trailer Hitch Receiver Lock for 2" Hitches - Flush - 2-5/8" Span - Chrome # e98880. You will want to make sure you select...
    view full answer...

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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Michael H
Expert Research:
Michael H
Employee Dustin K
Video Edited:
Dustin K
Employee Cole B
Installed by:
Cole B
Employee Hayden R
Installed by:
Hayden R
Employee Chelsea B
Written by:
Chelsea B
Employee Wilson B
Updated by:
Wilson B
Employee Hannah L
Updated by:
Hannah L
Employee Kristina F
Updated by:
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Employee Isabelle B
Updated by:
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