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  1. Tonneau Covers
  2. BAK Industries
  3. Fold-Up - Hard
  4. Flush Profile - Inside Bed Rails
  5. Rack Compatible
  6. Aluminum
BAKFlip MX4 Hard Tonneau Cover - Folding - Aluminum - Matte Finish

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

Item # BAK48331
Retail:$1,500.00
Our Price: $1,249.99
You Save: $250.01
Tonneau Covers

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Shipping Weight: 71 lbs
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Get style and versatility with this heavy-duty, all-aluminum tonneau. Quad-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 covers from BAK Industries. BAKFlip MX4 Hard Tonneau Cover - Folding - Aluminum - Matte Finish part number BAK48331 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (102)
  • Q & A (0)
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BAK Industries Tonneau Covers - BAK48331

  • Fold-Up - Hard
  • Flush Profile - Inside Bed Rails
  • BAK Industries
  • Rack Compatible
  • Aluminum
  • Matte
  • Opens at Tailgate

Get style and versatility with this heavy-duty, all-aluminum tonneau. Quad-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.


Features:

  • Custom-fit tonneau cover protects your cargo and your vehicle's bed from the elements
    • Aerodynamic style reduces wind drag, improving gas mileage
  • Quad-fold design allows for partial or full truck bed access in seconds without having to remove cover
    • Prop rods let you secure folded cover in upright position so you can drive with truck bed completely open
    • Integrated buckle system lets you secure the cover in the folded, flipped up, or closed position
  • Low-profile cover sits inside your truck bed rails
    • Compatible with stake-pocket-mounted accessories and raised side rails
  • Automatically latching panels create a secure truck bed when tailgate is closed and locked
    • Rear seal lets you open and close tailgate with cover open or closed
  • Matte black rubber seals and built-in drainage system help to keep water out of bed
  • 1/2" Thick, rustproof aluminum panels are sturdy and durable
    • Premium density foam core adds strength
    • Cover rated to hold up to 400 lbs of evenly distributed weight
  • Matte black finish is resistant to scratches, scuffs, and UV rays
  • Aircraft-grade, rustproof aluminum rails with black powder coat finish create base for tonneau
  • Easy, no-drill installation
    • Frame rails clamp to the inside of your truck bed side rails
    • Included bolts secure front hinge rail to frame rails
  • Compatible with BakBox2 (sold separately)
  • Made in the USA
  • 5-Year warranty


448331 BAK Industries BAK Flip MX4 Hard Folding Truck Bed Cover

Replaces 48331

Installation Details BAK48331 Installation instructions

This Product Fits The Following Vehicles



California residents: click here


Customer Satisfaction Score:


Customer Reviews

BAKFlip MX4 Hard Tonneau Cover - Folding - Aluminum - Matte Finish - BAK48331

Average Customer Rating:  4.6 out of 5 stars   (102 Customer Reviews)

Get style and versatility with this heavy-duty, all-aluminum tonneau. Quad-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.

by:

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.



by:

Well made cover. A lot sturdier than I thought it would. Its not full proof so water does get in the bed but it's minimal. The cover partially blocked my tool box which sit in the bed, so I removed the tool box cover for easy access.



by:

This is the second BAKFlip i've owned they vare great,going thru etrailer is an easy process



by:

Installation was easy, although it has never aligned perfectly. It has worked well, although it has been designed to be usable in the open position with the last panel (closest to cab) closed and the folded portion strapped into position. I bought it specifically for that so I could access my 5th hitch and tow, with a portion covered. It seems to be stressful on the cover to use it this way…all of the foam bumpers have worn off and have even put some dents in the cover. It’s a great concept, but could use some design tweaking.



by:

All is well....except, the caps at the joints of the folds keep popping out of place. leaving unsightly bludges in the top. With some work you can pop them back in place, sometimes easily sometimes not. Overall pleased, this is our 2nd BAKFlip and would purchase again.



by:



by:

I have owned this cover for over a year and it has been excellent. It keeps the bed fairly dry as expected and I have had no mechanical issues with it as it still performs like new. I would say the only improvement I would suggest is better foam weather striping for the front of the bed as the original never stuck to the spray in liner very well and eventually came lose and then I just swapped with some similar weather striping I bought locally.



by:

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.



by:

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.



by:

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!



by:

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



by:

Easy to install. Doesn't leak. Easy to clean, and seems to have improved my fuel mileage a bit. I am happy and would highly recommend this cover. Fits my 2018 Silverado perfectly.



by:

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.



by:

Cover went on easy and looks good on the truck. We put it on our 2020 Colorado which we tow with our motor home. It works great for extra secured storage. The only problem was with the rubber bumpers on the bottom and the two on top , fell off as soon as I opened the box. Not a big deal just had to use a little gorilla glue on them and all has been good.



by:

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



by:

This tonneau cover can be installed by one person. It works great. It is water proof in the rain.



by:

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



by:

This is the third MX4 that I have owned. This one is on Ford’s Maverick. The first two fit well but not perfect. I don’t really know if the slight issues were the fault of the truck or the cover. This cover is the best yet. Absolutely no leaks!! The fit to the tailgate is very uniform!! When ever I need a cover, I don’t even look at te competition. These are great covers.



by:

After a year of using the cover I found that there are a few things that could be improved and you can do some of these yourself.
The knobs for the cover that actually hold it into the bed-vibrate loose. I added my own lock washers. The poles that you use to hold the cover up when the cover is raised up against the back window-they also vibrate loose-so often that I just removed them and keep them under my seat. The little u-clip pole holders for the poles when not in use-they are too weak-often letting the poles jump out or fall out during normal road driving.
The cover itself is not waterproof --it sheds water away mostly however enough gets into the bed that you can not trust your items to be dry. Bag important stuff to keep it dry.
The rear weather seal slides back and forth too easily--sometimes working itself out about 2 inches until you see it and slide it back into place--i addenda small amount of silicone to stop this from moving.
The cover is strong, looks good and is mostly what I was looking for. Unfortunately I would not buy this again-even more because you have to relocate the bed accessory rails-which then limits the items you can buy for your truck because they are designed for the rails to be in the factory positions.
My next cover will be a roll up so that it allows visibility out of the back window. When this cover is flipped up to its final position it completely blocks the rear window. When I was looking at covers-my thought was well its the coolest looking cover and I can deal with not seeing out the back window--well that has changed. It is not practical. The price is high and there are many other options out there that are. My soft roll up tonneau cover was great-waterproof and I could have bought 6 of them for this price. If one was damaged it would have been better to just throw it away and order a replacement. Sorry guys-look elsewhere for a better cover.



by:

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



by:

I love the cover, very sturdy and has held up very nice for 1 year. The one issue is, I have a long bed Ram and when I fold it up against the cab, it covers the camera for the bed. This is a design flaw and if you use the bed camera when you have a load in the bed and the cover is folded all the way up, you can't use it.



by:

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



by:

I've had the cover for one year now and the cover has gone through the worst California winter weather for the last 3o years. It kept my stuff 99% dry! It's not 100% leakproof and that was expected but given the conditions esp during rainy season, it has performed above expectations.



by:

It's a straight forward assembly but photos of the assembly steps would be better than the illustrations.
NOTE: This model allows you to open and close the tailgate without lifting up the cover. The other models require you to lift the cover so the tailgate won't damage it.



by:

I am very happy with my BAKFlip MX4 Hard Tonneau Cover - Folding - Aluminum - Matte Finish - BAK48203.
Really.
And the service I received in its regard was top-notch. It did arrive with a non-functioning blemish but I was compensated by the company, immediately. Also, a part broke shortly after I installed it and again, the company stepped up.
As for the tonneau cover itself:
•it folds open and closed easily as advertised,
•I can stand on it if needed,
•it keeps out the rain (I've run it through car washes too, and the contents of the bed remain dry,
•it was easy to install
•I love that concern for locking the bed by closing before/after tailgate is not an issue.


25
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See what our Experts say about this BAK Industries Tonneau Covers

  • Front Panel and Folding Panel Length of Bak Tonneau BAK48331 For 2022 Ford F-250 Long Bed
    The front header panel of the Bak tonneau cover part # BAK48331 that fits your 2022 Ford F-250 long bed is about 6 inches long and each of the folding sections is about 22-1/2 inches long.
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  • Will The BAK Revolver X4s for a 2023 Ford F-350 8' Long Bed Cover The Front Portion Of Bed Only?
    The BAK Revolver X4s Hard Tonneau Cover # BAK49ZR which fits your 2023 Ford F-350 8' long bed has to be in either the fully rolled up or fully covered position. If you go with a cover like the BAKFlip MX4 Hard Tonneau Cover # BAK48331 you will be able to have the panels folded up on the front of the bed partially covering your bed.
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  • Will Extang EnCore Fit with 5th Wheel Trailer on a 2018 Ford F-350 Long Bed
    You should be able to install a 5th wheel hitch and couple up to your 5th wheel trailer with the Extang EnCore Hard Tonneau Cover # EX62430 installed and in the folded up position on your 2018 Ford F-350 Super Duty but it will definitely reduce your turning clearance. I have some similar recommendations for you though. I recommend going with the BAK Revolver X4s Hard Tonneau Cover # BAK49ZR instead. This combines the sleek look of a soft tonneau with the durability of a hard tonneau due...
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  • What Ladder Rack Will Work with the BAKFlip MX4 Tonneau Cover on a 2020 Ford F-350 Super Duty
    We do have a ladder rack solution for your 2020 Ford F-350 Super Duty with the BAKFlip MX4, part # BAK48330 for short bed or # BAK48331 for long bed, but you are correct that the vast majority out there use a clamping system which makes them incompatible with most tonneau covers. For your application you can use the Adarac Pro Series Ladder Rack, part # A4000952 for short bed or # A4000958 for long bed, because it uses an anchoring system with the stake pockets instead of a clamping system...
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  • Recommended Retractable Tonneau Cover And Storage Box For A 2022 Ford F-450 Super Duty
    The UWS Truck Bed Chest - Secure Lock Under Tonneau Series # UWS08297 has a few different tonneau covers in the product pictures. One being a hard roll up cover like the BAK Industries # BAK39331 and one hard folding cover like the BAK Industries # BAK48331. As for the retractable cover, the pictures are a little too generic to determine the exact model. For a hard retractable tonneau cover for your 2022 Ford F-450 Super Duty I recommend the RetraxPRO XR Hard Tonneau Cover - Retractable...
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  • Could BakFlip Tonneau Cover Close Over B and W Companion Fifth Wheel Hitch in 2019 Ford F-250
    We do install fifth wheel hitches and rail kits here at our location in Wentzville, MO and it is possible a BakFlip Tonneau can fit over a fifth wheel hitch but the hitch would need to have a handle that does not point up like the B and W Companion part # BWRVK3500. To install this in your 2019 Ford F-250 long bed you'd need the rail kit part # BWGNRK1116. I attached an install video for this for you to check out as well. In case you didn't have the tonneau already the correct part number...
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  • Best Type of Tonneau Cover for 2021 Ford F-350 Long Bed with Gooseneck Hitch and OEM Camera
    For a tonneau cover to use with a gooseneck trailer the BAKFlip MX4 won't be your best option as it's either going to fold up against the back glass and block total view or it's going to fold down on the last panel and be thick enough that it would cause interference issues with the overhang of your trailer. In the picture I attached you can see it would block the camera as well. A better option for your long bed 2021 Ford F-350 would be a retractable tonneau cover that stores down in...
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    Image 1 for
  • Will BAKBox 2 Work with RetraxPRO MX Tonneau Cover for 2017 Ford F-350 Long Bed
    The BAKBox 2 Collapsible Truck Bed Toolbox # BAKBX92333 is designed to work with rails on the BAK Revolver X2/X4s, Roll-X (discontinued), and BAKFlip tonneau covers. Although the BAKBox 2 has not been tested for compatibility with the RetraxPRO MX Hard Tonneau Cover for your 2017 Ford F-350 long bed, part # RT80384, from what I can see, it's highly unlikely that they would work together. Below are the correct part numbers for the available tonneau cover options that do work with the #...
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  • What Ladder Rack will Work with the BAKFlip MX4 Hard Tonneau Cover on a 2018 Ford F-350
    I do have options for you but the Thule TracRac SR Sliding Truck Bed Ladder Rack part # TH43003XT-000 won't work with the BAKFlip MX4 Hard Tonneau Cover part # BAK48331 on your 2018 Ford F-350. The reason for this is because the uprights on the ladder rack are angled inward and the folding slats on the MX4 would come into contact with the uprights when lifted. You may be able to open the first slat if you moved the rear upright all of the way forward but this is surely not ideal. Instead,...
    view full answer...
  • Compatible Ladder Rack and Tonneau Cover for 2018 Ford F-350 Super Duty Long-Bed
    Often tonneau covers and ladder racks interfere with each other when they require common mounting points on the truck bed rails. But there is a compatible combination that we know from experience will work well on your long-bed F-350. BAK Revolver tonneau cover # BAK39331 mounts inside the bed rails which allows use of the TracRac SR sliding ladder rack which mount on top of the bed rails. Several versions of the SR are shown on the linked page. For your long-bed you can use either the...
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  • Stake Pocket Compatible Ladder Racks for 2019 F-350 With Tonneau
    The Thule TracRac Contractor Truck Bed Ladder Rack - Side Mount - Steel - 250 lbs # TH14750 gets the support it needs from the floor which is why there isn't a similar rack compatible with stake pocket use. You can get a full ladder rack that will use the stake pocket and utilize the full side to side bracing for support like the Adarac # A70450. IF you let me know your specific vehicle, I can give you a compatible rack option. To not interfere with a folding cover you would need to...
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Do you have a question about this Tonneau Cover?


Info for this part was:

Employee Tyler C
Edited by:
Tyler C
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Dustin K
Video Edited:
Dustin K
Employee Zach D
Video Edited:
Zach D
Employee Hayden R
Test Fit:
Hayden R
Employee Wilson B
Updated by:
Wilson B
Employee Jason W
Updated by:
Jason W
Employee Noah M
Updated by:
Noah M
Employee Ronnie R
Written by:
Ronnie R

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