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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 # BAK48120
Retail:$1,725.76
Our Price: $1,199.99
You Save: $525.77
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. 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 covers from BAK Industries. BAKFlip MX4 Hard Tonneau Cover - Folding - Aluminum - Matte Finish part number BAK48120 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 - BAK48120

  • 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. 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.


Features:

  • Custom-fit tonneau cover protects your cargo and your vehicle's bed from the elements
    • Aerodynamic style reduces wind drag, improving gas mileage
  • Tri-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


448120 BAK Industries BAK Flip MX4 Hard Folding Truck Bed Cover

Replaces 48120

Installation Details BAK48120 Installation instructions

This Product Fits The Following Vehicles



California residents: click here



Customer Reviews

BAKFlip MX4 Hard Tonneau Cover - Folding - Aluminum - Matte Finish - BAK48120

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

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.

by:

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:

Great product.
Holding up well after
1 year. Easy to install and still fits great. Had a buckle crack under warranty and it was replaced free of charge and quickly. Great customer service.



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:

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:

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:

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 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:

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:

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



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:

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:

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



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.



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.


25
102
Show More Reviews

See what our Experts say about this BAK Industries Tonneau Covers

  • Ladder Rack Compatible With MX4 Tonneau Cover For Carrying 2 Kayaks With a 2017 Chevy Silverado 1500
    With the BAKFlip MX4 Hard Tonneau Cover # BAK48120 installed on your 2017 Chevrolet Silverado 1500 5-1/2' Bed you will need the Adarac Pro Series Custom Truck Bed Ladder Rack # A4000963. This ladder rack is mounts to your bed rails via the stake pockets in the top of the bed rails. It does not use clamps on the inside of the bed rails as many other ladder racks require. With the Adarac Rack you will be able to carry up to 500lbs of cargo or in your case Kayaks. The etrailer J-Style Kayak...
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  • Which Tonneau Cover Is Recommended to Fit with TracRac Sliding Ladder Rack on 2016 Chevy Silverado
    Some people have had luck installing a sliding Thule TracRac like the part # TH43002XT-782 with the BackFlip MX4 like the part # BAK48120 that you have installed on your 2016 Chevy Silverardo 1500 5-1/2 foot bed. That said the issue isn't so much the folds interfering with the uprights as much as it is the base rails of the rack not allowing the cover to fold. This is due to the tonneau covering a small part of the bed rail cover like what you have in your picture. The only tonneau we...
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  • Compatibility Of Adarac Ladder Racks With BAKFlip Tonneau Cover On A 2017 Chevy Silverado 1500
    BAKFlip tonneau covers like the BAKFlip MX4 Hard Tonneau Cover - Folding - Aluminum - Matte Finish # BAK48120 sit inside of the bedrails which will allow Adarac ladder racks like the Adarac Pro Series Custom Truck Bed Ladder Rack - Aluminum - 500lbs # A4000963 to mount into the stake pockets of your 2017 Chevy Silverado 1500's bedrails. I've attached some videos below that will offer some additional information on these products as well as the installation process.
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  • Will BakFlip Folding Tonneau Cover Fit 2017 Ram 2500 Short Bed and Allow Access to 5th Wheel Tow
    I attached a picture that shows the Bakflip G2 part # BAK26203 installed on a very similar 2017 Ram 3500 short bed and you can see that with the last panel folded down the fifth wheel hitch head is accessible. This means you'd also have access to the Andersen Ultimate adapter as well.
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  • Is Thule TracRac SR Ladder Rack Compatible w/ Tonneau Cover on 2017 GMC Sierra w/ 5-1/2 Foot Bed
    While the Thule TracRac SR Sliding Truck Bed Ladder Rack # TH43002XT-782 will technically fit your 2017 GMC Sierra 1500 with a 5-1/2 foot bed and the BAKFlip MX4 # BAK48120, the issue is functionality. If you take a look at the accompanying photo, the arrow I added shows the flap of the BAKFlip MX4 and how it extends onto the bed rails. What this means is that you may have difficulty when trying to fold the MX4 up or back down and it may rub against the rails of the ladder rack. What...
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  • Ladder Rack for 2018 Chevy Silverado 1500 5 ft 9 in Bed with BAK BAKflip MX4 Tonneau Cover
    We do offer ladder racks that will fit with tonneau covers that attach to the inner edge of the bed side rails like the # BAK48120 BAKflip MX4. The best option is the Adarac ladder rack, because it features uprights that are perpendicular to the bed sides, and will not interfere with your ability to fully open the tonneau cover so it's folded against the rear of the truck cab. For your 2018 Chey Silverado 1500 with the 5 foot 9 inch bed (which everybody refers to as the '5-1/2 foot...
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  • How To Open the BAKFlip MX4 If Locked Out of the Truck Bed
    The BAKFlip MX4 Hard Tonneau Cover part # BAK48120 which is a fit for 2014 - 2018 GMC Sierra/Chevrolet Silverado 1500's with the 5-1/2' bed is very secure. In order to access the release string for the cover you would need access to inside the bed which could only be done with the tailgate down. However, I suppose it would be possible to bend a coat hanger and somehow pull the release string but I cannot recommend this as it would likely damage the weather seal. I spoke with BAKFlip and...
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  • Replacement Rails and Hardware Kit for BAKFlip MX4 Tonneau for 2015 GMC Sierra 1500 5.5 ft Bed
    Since the BakFlip MX4 you'd have on your 2015 GMC Sierra 1500 5-1/2 foot bed is the part # BAK48120 the correct replacement rail kit you'd need is the part # BAKRAILS-48120 and you'd be set. Then the correct hardware kit you'd need is the part # BAKBK-306KIT.
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  • Will A Tonneau Cover From A 2013 Silverado Fit A 2015 Sierra?
    It looks like there may be some tonneau covers that fit both the 2013 Sierra and the 2015 Sierra, however, GM made some changes to the 2013 year so you will want to measure both truck beds and verify that they are the same exact dimensions. For example, the BAKFlip MX4 Hard Tonneau Cover - Folding # BAK48100 fits the 2013 Sierra/Silverado 5-1/2' bed but it does not fit the 2015 models. And the BAKFlip MX4 Hard Tonneau Cover - Folding # BAK48120 fits the 2015 Sierra/Silverado 5-1/2' bed...
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  • Ladder Rack or Roof Rack To Use with Ski Racks and Cargo Boxes wFolding Hard Tonneau Cover
    I have a solution for you, but finding a cargo rack that installs on the bed rails that can also be used with a tonneau cover and vice versa presents a unique set of challenges. Some tonneau covers overlap onto the bed rails (see the attached picture) and you can't use a rail system on a tonneau cover since the rails would need to be drilled into the cover. That really leaves you with 2 options: a roof rack kit that sits on the truck cab, or a ladder rack that mounts on the rails paired...
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  • How Does BAKFlip MX4 Hard Tonneau Cover # Bak48120 Lock to Truck Bed
    The BAK Tonneau part # BAK48120 has a passive locking system. Basically once your tailgate is closed and locked on your 2016 GMC Sierra 1500 5-1/2 foot the tonneau would be locked since the only way to access it's latching mechanism is with the tailgate open. So keeping the tailgate locked will keep the tonneau cover locked. This is nice too because it doesn't require you to keep track of an additional key for it.
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  • How Much Does The BAKFlip MX4 Hard Tonneau Cover BAK48120 Weigh?
    The BAKFlip MX4 Hard Tonneau Cover # BAK48120 weighs in at 70 pounds.
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  • Comparing Extang MX4 and Xceed for a 2014 Chevy Silverado 1500 with 5-1/2' Bed
    The BAKFlip MX4 Hard Tonneau Cover part # BAK48120 and Extang Xceed Hard Tonneau Cover part # EX85445 are both great options for a 2014 Chevrolet Silverado 1500 with 5-1/2' bed. The Xceed is a quad fold whereas the MX4 is a tri fold. The extra fold means each part is lighter. This is the most notable feature but there are also improvements to the Xceed in regards to durability (enduracoat), water management, and the latch mechanism. I recommend the Xceed because of the added features and...
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  • Rapid Switch Pro Sport Ladder Rack that Fits 2018 GMC Sierra 5.5 ft Bed with Bakflip MX4 Tonneau
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  • How Secure is the BAKFlip MX4- Can It Be Pried Open When the Tailgate is Closed and Locked
    Just like anything that we leave out in the open, if someone really wants to get into it, they'll find a way. With that being said, the BAKFlip MX4 Hard Tonneau Cover # BAK48120 comes with automatically latching panels to create a secure truck bed when tailgate is closed and locked. The MX4 has latches under the cover that cannot be accessed with the truck's tailgate closed and locked and each panel individually latches down when you fold the cover to the closed position. Since this mounts...
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  • Truck Bed Tool Box for the BAKFlip MX4 Hard Tonneau Cover 2017 GMC Sierra 1500
    I do have a truck bed tool box designed to work with the BAKFlip MX4 Hard Tonneau Cover part # BAK48120 for your 2017 GMC Sierra 1500 but the TruXedo TonneauMate Truck Bed Toolbox part # TX1117416 will not work as it is only designed to be used with TruXedo tonneau covers not BAKFlip tonneau covers. For a toolbox that is confirmed to work with your BAKFlip MX4 Hard Tonneau Cover, I recommend the BAKBox 2 Collapsible Truck Bed Toolbox part # BAK92120. This toolbox is 10" wide x 10" deep...
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    There are going to be a lot of options for a Tonneau Cover for a 2023 Toyota Tacoma with a 6' bed. Ultimately it will come down to what style of cover you want, and how much you want to spend. In recent years, the retractable covers have been a very popular option. They are easy to install, and have a very smooth opening/closing. One of our most popular retractable covers is the Pace Edwards Switchblade # 311-SWTA13A37. Aluminum panels give the cover a seamless look, which will help to...
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    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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  • Ladder Rack Compatibility with 2018 Chevy Silverado 1500 Crew Cab Short Bed
    The BAKFlip MX4 Hard Tonneau Cover - Folding - Aluminum - Matte Finish # BAK48120 for a 5-1/2 foot box is compatible with the Adarac Pro Series Custom Truck Bed Ladder Rack - Aluminum - 500 lbs # A4000963. If you have the standard 6-1/2 foot box that some still refer to as short bed, then you will want to use # A4000948 and # BAK39121.
    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 Joshua S
Video Edited:
Joshua S
Employee Jacob T
Video Edited:
Jacob T
Employee Dustin K
Video Edited:
Dustin K
Employee Zach D
Video Edited:
Zach D
Employee Hayden R
Test Fit:
Hayden R
Employee Shane H
Test Fit:
Shane H
Employee Robert C
Test Fit:
Robert C
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
Employee Michael B
Video by:
Michael B

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