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  1. Tonneau Covers
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  3. Fold-Up Tonneau
  4. Matte Black
  5. Rack Compatible
  6. Flush Profile - Inside Bed Rails
BAKFlip MX4 Hard Tonneau Cover - Folding - Aluminum - Matte Finish
$125 MIR with purchase of BakFlip MX4 Cover - 7/1/22 to 7/31/22

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

Item # BAK48331
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Retail:$1,302.28
Our Price: $1,140.88
$1,015.88 after $125.00 Mail-In Rebate
Tonneau Covers

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Tonneau Covers BAK48331 - Rack Compatible - BAK Industries
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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. Lowest 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 (62)
  • Q & A (0)
  • Photos
  • Why etrailer?

BAK Industries Tonneau Covers - BAK48331

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

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 Reviews

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

Average Customer Rating:  4.6 out of 5 stars   (62 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:

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.


Comments
I have gotten in contact with one of our installers and they suggested that if those components are popping out, they should be able to be glued in place.
-- Etrailer Expert Katrina B - 04/08/2022

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:

Review from a similar BAKFlip MX4 Tonneau Cover in Tonneau Covers


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:

Review from a similar BAKFlip MX4 Tonneau Cover in Tonneau Covers


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


Comments
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.
-- Etrailer Expert Jenny N - 04/04/2022

by:

Review from a similar BAKFlip MX4 Tonneau Cover in Tonneau Covers


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:

Review from a similar BAKFlip MX4 Tonneau Cover in Tonneau Covers


It was very easy to install even though I had never installed a tonneau cover before. One year later, the finish is still excellent. I never installed the drain tubes to divert any water from the outside but very little water ever infiltrates past the cover even when I wash the cover with my hose. One minor thing that can be an issue is when unlatching and latching the middle of the five panels, the end cap on the hinge near the bedrails sometimes disengages. The cover still closes if I didn't notice the disengagement but I'll just flip back and tuck the end cap back in to the hinge, no big deal. Overall very sturdy and durable. My neighbor wants one now.



by:

Review from a similar BAKFlip MX4 Tonneau Cover in Tonneau Covers


This is my second purchase from etrailer. I have purchased two hard Tonneau covers for two separate trucks. I have been very happy with both purchases and have nothing but excellent service from etrailer.



by:

Review from a similar BAKFlip MX4 Tonneau Cover in Tonneau Covers


I like the tonneau cover a lot! It's sturdy and helps keep belongings out of sight, out of mind. I had to cut the rail as it was about an inch too long for my truck but besides that the install was easy.


Comments
I reached out to the manufacturer and they said if you install the rails with the tailgate closed then the rails would sit on top of the tailgate, which is correct.
-- Etrailer Expert Sierra K - 01/20/2022

by:

Review from a similar BAKFlip MX4 Tonneau Cover in Tonneau Covers


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:

Review from a similar BAKFlip MX4 Tonneau Cover in Tonneau Covers


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:

Review from a similar BAKFlip MX4 Tonneau Cover in Tonneau Covers


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



by:

Review from a similar BAKFlip MX4 Tonneau Cover in Tonneau Covers


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



by:

Review from a similar BAKFlip MX4 Tonneau Cover in Tonneau Covers


One of the best things I have done and the BAK flip is great


Comments
Great I love it. Best thing I have done for my f150
Gary - 08/18/2021

by:

Review from a similar BAKFlip MX4 Tonneau Cover in Tonneau Covers


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:

Review from a similar BAKFlip MX4 Tonneau Cover in Tonneau Covers


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:

Review from a similar BAKFlip MX4 Tonneau Cover in Tonneau Covers


Excellent tonneau, easy install, quality product. Installed a year ago, no problems, still looks like new



by:

Review from a similar BAKFlip MX4 Tonneau Cover in Tonneau Covers


Works great and 5th wheel hitch fits underneath and when folded up I can hitch up my trailer without removing cover. Only issue is the corner pieces on the end section came off and I can’t get manufacturer to help me get replacement.



by:

Review from a similar BAKFlip MX4 Tonneau Cover in Tonneau Covers


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.


Comments
Im sorry to hear about the issues youve had with your BAKFlip MX4. If youre looking to go back to a more traditional style, soft roll-up cover, I recommend checking out the Access TonnoSport # A22050279
Access TonnoSport Soft, Roll-Up Tonneau Cover
$300.03
because it checks a lot of the boxes of things you liked about your previous cover. The TonnoSport is a soft roll up cover that is on the affordable end of the spectrum. It also includes brackets to mount into the OEM rails while they are in their original location.
-- Etrailer Expert Victoria B - 01/22/2020

by:

Review from a similar BAKFlip MX4 Tonneau Cover in Tonneau Covers


Good quality and relatively easy to install !!
Good value for the money too !!



by:

Review from a similar BAKFlip MX4 Tonneau Cover in Tonneau Covers


I am so happy I purchased this BAKFlip. The installations were perfectly understandable which is a big deal to me and the actual installation was easily completed. I did need my wife to help tighten two screws but otherwise I completed the job without assistance in about one hour. After using the BAKFlip for approximately one year I haven't needed to make any adjustments to the product and it works perfectly and looks new. I believe having the BAKFlip has made my personal property in the truck bed more secure in addition to being out of sight. This product has exceeded my expectations and made me very happy. I would purchase this again without hesitation.



by:

Review from a similar BAKFlip MX4 Tonneau Cover in Tonneau Covers


Really nice addition to the truck bed. Softens the sound and keeps objects from moving around.



by:

Review from a similar BAKFlip MX4 Tonneau Cover in Tonneau Covers


Keeps out the water well. However if you do a lot of dirt roads like I do a lot of dust still gets in. No regrets buying it.



by:

Review from a similar BAKFlip MX4 Tonneau Cover in Tonneau Covers


I really like my cover. I do have some water leakage, but I would buy again.


Comments
After a year The weather strip has come unglued and one off theElevator bolts w-large flat headis rusty. I have not contacted BakFlip at this time. The rest of it is still working great!
Tim - 09/21/2021

by:

Review from a similar BAKFlip MX4 Tonneau Cover in Tonneau Covers


Love the BAKFlip. Well-built and easy to work. I did notice, however, that I need to be careful with the foam padding that is attached with sticky tape. It does not always hold. As a result, I have to stick it back on. Will have to figure out a way to make them stick better. Otherwise, I love it!



by:

Review from a similar BAKFlip MX4 Tonneau Cover in Tonneau Covers


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.


Comments
Great cover holds up really well, no problems
Martin Z - 09/19/2018

25
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Ask the Experts 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.
    view full answer...
  • 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 X4 Hard Tonneau Cover # BAK79331 instead. This combines the sleek look of a soft tonneau with the durability of a hard tonneau due...
    view full answer...
  • 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...
    view full answer...
  • 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...
    view full answer...
  • 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...
    view full answer...
  • 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/X4, 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 #...
    view full answer...
    Image 1 for
  • 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...
    view full answer...
    Image 1 for
  • Ladder Rack and Tonneau Cover Options for a 2019 Ford F-350 Super Duty
    The Thule TracRac SR Sliding Truck Bed Ladder Rack part # TH43003XT-000EX will fit on your 2019 Ford F-350 with the tonneau cover that you have now. However, the rearmost rack would need to be slide forward in order to open the panels on the tonneau cover because the uprights on the rack are angled in which is not ideal. Therefore, a better option for you if you wanted to use the above is the BAK Revolver X4 Hard Tonneau Cover part # BAK79331. This cover will not interfere at all with the...
    view full answer...
    Image 1 for
  • 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 Series tonneau covers # BAK79331 and # BAK39331 mount 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...
    view full answer...
  • 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...
    view full answer...
  • 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...

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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:
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