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BAK Industries

BAKFlip MX4 Hard Tonneau Cover - Folding - Aluminum - Matte Finish

Part Number: BAK48126

148 Reviews | 6 Questions

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$1,199.99

Not Confirmed to Fit

2017 Ram 3500

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bak industries tonneau cover fold-up - hard bakflip mx4 folding aluminum matte finish

bak industries tonneau cover fold-up - hard aluminum

bak industries tonneau cover tailgate lock

bak industries tonneau cover fold-up - hard

bak industries tonneau cover tailgate lock bak48126

bak industries tonneau cover fold-up - hard tailgate lock bak48126

bak industries tonneau cover tailgate lock aluminum bak48126

bak industries tonneau cover fold-up - hard tailgate lock bakflip mx4 folding aluminum matte finish

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Get style and versatility with this heavy-duty, all-aluminum tonneau. Tri-fold cover sits inside your vehicle's bed rails and secures upright for unrestricted bed access. Tailgate opens and closes with cover up or down. Matte black finish. Great Prices for the best tonneau cover from BAK Industries. BAKFlip MX4 Hard Tonneau Cover - Folding - Aluminum - Matte Finish part number BAK48126 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.

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BAK Industries Tonneau Cover - BAK48126

Highlights

Custom Fit for Your Vehicle: Secures to your truck bed with model-specific clamps and hardware
Keeps Gear Protected: Hard aluminum panels lock with the tailgate to secure your cargo.
Full Bed Access: Tri-fold design flips up or folds for open bed use anytime.
Stays Dry: Matte rubber seals and a drainage system channel water away from the bed.
Built to Last: 1/2" thick, rustproof aluminum panels support up to 400 lbs evenly.
Low-Profile Look: Flush, matte-black finish resists UV, scratches, and scuffs.

Features to know about

Full Cargo Access: Tri-Fold Aluminum Panels

Some covers get in the way when you need to load large items, but this one folds up in sections so you can use all or part of the bed anytime. The tri-fold design lets you flip the panels forward or secure them upright with prop rods so you can drive with the bed completely open. Because it mounts inside the bed rails, you still have room for stake-pocket accessories or a rail-mounted rack setup.

Reliable Protection: ½" Thick Aluminum Panels with Drainage System

Rain, snow, and road grime don’t stand a chance against the MX4. Its ½" thick rustproof aluminum panels and dense foam core block out moisture while staying light and strong. Matte black rubber seals line the edges, and a built-in drainage system channels water out of the bed instead of letting it pool. The cover is rated to hold up to 400 lbs of evenly distributed weight, so it easily handles gear stacked on top without flexing.

Everyday Convenience: Opens with the Tailgate Up or Down

You don’t have to fold or unlatch this cover just to reach your gear. The rear seal is designed so the tailgate opens and closes whether the cover is up or down. Automatic latching panels lock in place as soon as they close, and when paired with a locked tailgate, your bed stays secure without extra steps or added hardware.

Long-Lasting Finish: Matte Black, Scratch- and UV-Resistant

Over time, some covers fade or show scratches from everyday use. The MX4’s matte black finish resists UV rays, scuffs, and marks to keep its clean look even after years in the sun. The aircraft-grade aluminum rails use a black powder coat that won’t rust, giving you a low-profile cover that stays looking sharp with minimal upkeep.

Simple Setup: No-Drill Clamp-On Installation

Getting it mounted is straightforward—no drilling or special tools needed. The frame rails clamp inside the bed rails and align easily, while included bolts secure the front hinge rail to complete the setup. Once installed, everything stays tight and smooth through daily use without constant adjusting.

448126 BAK Industries BAK Flip MX4 Hard Folding Truck Bed Cover

Replaces 48126

Installation Details BAK48126 Installation instructions

This Product Fits The Following Vehicles

2015 - 2022 GMC Canyon 5 Foot Bed
2015 - 2022 Chevrolet Colorado 5 Foot Bed

4.6

148 reviews

5 Stars		(110)
4 Stars		(24)
3 Stars		(10)
2 Stars		(1)
1 Star		(3)

by: Joseph Embree 05/03/2020 One Year Later

this was easy to put on, no problem.
you can see in the picture it looks great on my gmc canyon!

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by: Robert 05/03/2022 One Year Later

Easy to install, and it holds up pretty well. The straps that hold it down when partially open can get in the way and one clip got broke. You have to be careful when loading big things with the top down that you don’t snag the straps, clips or cables. The prop rods are good but can get beat up by the loading process too. Also the knobs for the prop rod keeepers can fall off in the bed when the cover is closed. You need to make sure they are tight. Over all a great product, I love that it is strong, flat and solid and makes the whole bed secure. Also handy to set things on when working around mid the truck or for carrying stuff.

by: Lee 05/08/2020 One Year Later

Fits perfect, looks great and virtually waterproof. Be careful, it can dent rather easily.

Lee N. One Year Later

5/9/2021

Still performing perfectly. Dents easily is an issue but otherwise perfect.

by: John B 07/12/2026 One Year Later

I love how this tonneau cover works. because it allows use of almost the entire bed of the truck when it's fully open. I was a little disappointed with the clamps for installing the side rails, as they didn't seem as robust as the clamps in the cover I bought for my last truck. However, I am happy with its operation, and the fact that the truck bed is a locked compartment when I lock the tailgate.

Claire H.

7/14/2026

Thanks for the great feedback! We're glad you're enjoying the tonneau cover and that being able to use almost the entire truck bed when it's open has been such a big plus. It's also nice knowing your gear stays secure when you lock the tailgate. We appreciate you mentioning the clamps too—that kind of feedback is always helpful. Thanks again, and we hope you keep enjoying your new cover!

by: Gordon 05/21/2025

2022 Ford F-350 Super Duty

Bought it used.. I asked if it was complete undamaged.. It arrived complete including a scratch on the inside cover.. I'm glad it wasn't on the outside cover. Shipping was quick. Installation was fairly straight forward

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by: Doug 12/31/2025

Ordered the BAKFlip MX4 for my son on 12/15 after calling to verify the tonneau would arrive by Christmas. Then received an email that said "Your order has been forwarded to one of our partners for direct shipment to you" and never received another shipping update or any tracking info. Finally on 12/22 I emailed Etrailer.com who told me they didn't know when I would get it. The Tonneau finally arrived on 12/29, 3 days after my son returned to California (he drove his truck, 2100 miles). He won't be back till next Christmas so I have to figure out how to return this product. I had several other buying options to get this here by Christmas, but went with Etrailer because of their reputation. This will be my last purchase from Etrailer.com.

by: Christopher 12/09/2025 One Year Later

The bed cover has been great so far. Followed the instructions and took my time adjusting it and it has been working well. Keeps the bed dry and looks good. I did have to order an extra kit to get enough rail clamps. Once I put the extra clamps on it feels much more secure. For 8ft beds they need atleast 8 to 10 clamps, not 6. The cover has been working in that I don’t have to uncover the whole bed to use it. I just need to open up as much as I need at the time.

by: David 04/10/2022 One Year Later

Overall, I am very pleased with my BAKFlip MX4. It has held up well after 1 year. It works well and looks good. It matches my matte black accessories and trim. It was fairly easy to assemble but I did have some tight fitment issues near the cab where the cover connects to the rail. I really like the security of the hardtop and access through the tailgate. Water is generally kept out, but sometimes there are water drips near the tailgate depending on the angle parked. So this cover keeps the bed *mostly* dry.
etrailer was very fast to deliver my cover, and it came in good condition.

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by: Pete 11/14/2025 One Year Later

Pontiac Trans Sport Van

BAKFlip MX4 is a great addition to any pickup. It allows for secure transport of material, keeping it dry in bad weather and yet readily accessible with the flip of a panel. It also keeps the weather away from your 5th wheel hitch. Can be left on when towing.

by: Chris B. 09/26/2020 One Year Later

So after a year I am still loving this bed cover. Had the fiberglass version for my 2013 F-150 and loved it as well, that's why I purchased this one for my 2019 Super Duty, it was also the first accessory I purchased for it because I was so used to my other one and knew I couldn't live without it. I never installed the drain tubes on either covers and still haven't had water get it my bed. Also the folks at etrailer are always awesome! Thanks again!

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by: Justin 04/23/2024 One Year Later

I have been using this cover for almost a year now, and am very pleased with it. It looks and fits great, and it is secure and keeps most of the bed dry in the rain. A couple of rubber trip bits have needed some improved securing, and I used a little RTV so it was easy. I drove it across the country round trip last summer and it was perfect. I would recommend this cover for a great-looking and pretty secure cover. Finally, it is easy to fold forward when it is time to haul loads taller than the bed rails.

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by: Rob 06/02/2024 One Year Later

Purchased this BAKFlip for my new 22 RAM Classic 1500. Installation went well, instructions were good to follow, and it fit perfectly. One of the plastic hold down clips had a manufacturer defect with excess plastic mold residue inside the clip that prevented it from properly working. I sent an online warranty claim explaining the problem, and a new clip was sent to me in a reasonable amount of time, and it worked fine. After one year of using the cover, I am very happy with it. Everything functions as it should, and it is very versatile. While it is not 100% watertight, I mostly notice a small amount of leakage around the tailgate seal after washing the truck. Under normal rainy weather, there is no leakage, and we get plenty of rain in the PNW. My four-star rating rather than a 5 star is only because of the manufacturer defect and the curling of one of the rubber cushions on the underside of one of the panels where the adhesive holding it on the edges has not held up under the hot weather (with the black color, when the sun beats down on the cover it gets pretty toasty inside the truck bed with the cover closed). I am thinking that should be an easy fix by applying some good adhesive and taping in place until the adhesive cures. Just haven't gotten around to doing it. Again, really like this cover. Would recommend it to others, and if I ever have a need for one in the future, would definitely not hesitate getting another BAKflip.

Rob One Year Later

6/4/2025

The BAKFlip after 2 years is still functioning great. I fixed the curling cushion by applying some strong adhesive to the spots that had detached, taped it in place and let cure for a couple of days. That solved that issue. Would continue to recommend the BAKFlip to others.

by: Michael 03/29/2026

Great tonneau cover. Fits as it should.

by: Gene 03/05/2026 One Year Later

dodge Ram Pickup

Great fit on a Ram 2500 long bed. Everything stays dry on the inside.

by: Tianhe 03/26/2018

2017 Dodge Ram Pickup

I installed the BAKFlip MX4 in my RAM 2500 Crewcab has the 6' 1/2 short bed, drived 300 miles now. good product, open and close the tailgate without lifting up the cover

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by: Jason V 02/28/2023 One Year Later

The cover functions ok. The tailgate leaks quite a bit. The manufactured edges that where cut were sharp and not painted or treated. The weather strip along the edges has already discolored/faded. Disappointed in the fading and less than ideal sharp edges. Somewhat expected leaks, but not this much. Average at best rating, especially for the price.

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by: S 08/13/2025

Install was smooth and got a timely note when it was completed

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by: Mike M. 11/21/2020 One Year Later

I am a huge fan of the BAKFlip. The installation was pretty straight forward and easy. Anybody with moderate mechanical ability can install. I think it took less than 2 hours. I live in a heavy snow area and had more than 24” of snow on it at one point and the product performed flawlessly.

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by: Greg 05/23/2026

Excellent product! Wait time was crazy but manufacturer is to blame on that one!

by: Douglas 08/29/2025 One Year Later

I replace a camper shell with the tonneau cover because it is easier to remove when I want to put my pickup camper on the pickup. I am very happy with the cover and am glad I made the switch.

by: Dean 04/21/2021

the bedcover finally came in.
Few pictures of it installed.

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by: Robert 09/05/2025 One Year Later

I own three of these on three different trucks. The two I purchased this year and last year are not as good quality as the one I purchased in 2023.For the price they are feeling pretty cheap now and parts are falling off. Latch covers and rubber par to rest the top on when folded up have fallen off on both of the covers. I will not be buying these brand covers again.

by: James 07/22/2020 One Year Later

I really love the bakFlip cover. It locks up all my stuff when we are on the road. I really like the looks too.

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by: Mike 03/24/2022 One Year Later

Solid performance. Only issue is with the glue holding the pads is failing

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Jenny N.

4/4/2022

You mentioned that the glue holding the pads are failing. I wanted to see if you would be able to send a picture to show the locations.

by: Sherry H 05/16/2019

Love the MX4 ...Took a little longer to install but looks great...

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Sherry H. One Year Later

5/19/2020

Its still amazing. Works just like its suppose to glad I made the purchase.

148

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See what our Experts say about this BAK Industries Tonneau Cover

Do you have a question about this Tonneau Cover?

How to Keep Folding Tonneau Cover from Sticking to Rails in Freezing Weather
Definitely one of the things I don't miss about living in the Upper Midwest! In order to keep the seals on your BAKflip MX4 # BAK48126 from freezing to the side rails you'll want to use a silicone based lubricant spray like the Roadmaster LubeMaster Dry Silicone # RM-747. Just spray this along the contact points on the bed rails every-so-often and you'll keep moisture from building up and creating situations where your seals could get destroyed. This spray is safe to use on non-metal...
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Recommended Ladder Rack For 2016 Chevy Colorado 5' Bed with BAK MX4 Tonneau Cover
Yep! Since the BAK MX4 # BAK48126 you have installed in your 2016 Chevy Colorado with the 5' bed installs inside of the bed rails there is indeed a ladder rack option for you. I recommend the Adarac # A73DJ which'll work perfectly with your tonneau cover installed, and is pretty easy to install while being a very solid rack for your truck.
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Recommended Tonneau Cover to Prevent Leaks on 2018 Chevy Colorado
The correct BAKFLip MX4 Hard Folding Tonneau Cover for your 2018 Chevy Colorado is the part # BAK48126 if you have the 5 foot bed or # BAK48125 if you have the 6 foot bed. The BAKFlip MX4 # BAK48120 that you referenced is designed to fit certain model years of the Sierra and Silverado. This particular tonneau cover will do a great job of keeping water from inside the bed. It features black rubber seals and a built-in drainage system that is designed specifically for this purpose. We have...
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Will a Tonneau Cover for a 2017 Chevy Colorado Also Fit a 2018 Chevy Colorado
Yes, a tonneau cover for a 2017 Chevy Colorado will also fit a 2018 Chevy Colorado as long as they are the same length. For example, the BAKFlip MX4 Hard Tonneau Cover part # BAK48126 will fit both a 2017 and 2018 Chevy Colorado that have a 5' bed. For a toolbox designed to work with this tonneau cover, I recommend using the BAKBox 2 Collapsible Truck Bed Toolbox part # BAK92125.
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Tonneau Cover Recommendation for 2019 Ford F-250 Long Bed that Can Partially be Open
You'd need a retracting tonneau cover for your 2019 Ford F-250 8 foot bed if you want to partially cover your truck bed while towing a fifth wheel hitch. For that you'd want the RetraxPRO MX Hard Tonneau Cover # RT80384. This also does not add significant height when retracted like folding covers do as well. This cover can be partially open like you are wanting too.
view full answer...
Ladder Rack for 2018 Chevy Colorado 5 ft Bed for Use with BakFlip Tonneau
Yes, the Adarac Aluminum Series Custom Truck Bed Ladder Rack # A4001225 is the ladder rack/droid you are looking for. This is a fit for your 2018 Chevy Colorado with a 5 foot bed and since it installs on top of the bed rails it will allow your Bakflip part # BAK48126 to remain installed and function like normal since it installs between the bed rails which will bring balance to the force...I think. This will be a great base to support the Yakima SkyRise Tent part # Y07437 too.
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Info for this part was:

Edited by:

Tyler C

Expert Research:

Jameson C

Video by:

Joshua S

Updated by:

Wilson B

Updated by:

Noah M

Written by:

Ronnie R

Video Edited:

Zach D

Installed by:

Brent H

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