BAKFlip MX4 Tonneau Cover for Toyota Tundra
Our BAKFlip MX4 for Toyota Tundra delivers industrial-grade bed protection without sacrificing access. The four-panel aluminum design folds completely open for full-bed hauling, then locks flat when you need a low-profile seal. We engineered every hinge and seal to withstand highway speeds, ice, and direct sun — the matte finish resists UV degradation season after season.
Whether you’re securing tools on a job site or protecting weekend cargo, the MX4 installs in minutes using factory stake pockets — no drilling, no permanent modification. The cover sits flush against your Tundra’s bed rails, and the dual-action tailgate seal keeps dust and water out even on washboard roads. When winter hits, the panel design sheds snow and ice without cracking or warping.
Core specs & construction
Panel construction & weatherproofing
Each of the four panels is formed from extruded aluminum — the same alloy profile we use across the BAKFlip MX4 lineup — then powder-coated for UV and scratch resistance. The matte black finish won’t flake or fade after years of sun exposure, and the rigid panel core resists denting from hail or falling branches.
Panel edges meet with rubber-sealed hinges that flex through hundreds of open/close cycles without cracking. The dual-action tailgate seal is a continuous EPDM gasket that compresses when you latch the cover, blocking rain and dust whether the tailgate is up or down. We’ve tested every seal joint in freeze-thaw cycles and highway wind tunnel runs — water intrusion stays below 1% even in sustained 70 mph rain.
Folding positions & bed access
Positions 1 through 4
The MX4 opens in four distinct positions. Position 1 folds the front panel back against panel 2 — you gain access to the front third of the bed while keeping the rear two-thirds covered. Position 2 stacks panels 1 and 2 together, opening half the bed. Position 3 folds three panels forward, leaving only the tailgate panel flat. Position 4 is a complete 180° fold — all panels rest against the cab, and the entire bed is open for oversized cargo or a fifth-wheel hitch.
Automatic tension
Every hinge includes an internal coil spring that adjusts tension as you fold. You never need to manually reset panel alignment — the cover self-levels each time you latch it closed. This feature prevents sagging and ensures the matte surface stays flush with the bed rails regardless of how many times you cycle between positions.
Installation & fit for Tundra models
The clamp-on rail system bolts directly into your Tundra’s factory stake pocket holes — no drilling into the bed or cab. We include stainless-steel clamps and hex-head bolts sized for 2007–2024 Tundra short bed (5.5 ft, 66.7 in) and standard bed (6.5 ft, 78.7 in) configurations. Installation takes about 20 minutes with a basic socket set.
Bed rail height varies slightly between Tundra generations, so we ship adjustable clamp spacers that account for 2007–2013 and 2014–2024 rail profiles. The cover sits 1 inch above the bed rails when closed, creating a low-drag profile that doesn’t interfere with cab sight lines or add wind noise at highway speed.
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Common questions about the BAKFlip MX4 for Tundra
Yes. We manufacture MX4 covers specifically for the Tundra short bed (5.5 ft / 66.7 in) and standard bed (6.5 ft / 78.7 in). The part number differs between bed lengths, so confirm your bed size before ordering. Both versions use the same clamp-on rail system and install in factory stake pockets without drilling.
Yes. The dual-action seal allows the tailgate to open and close independently of the cover. When the cover is latched flat, you can drop the tailgate to access cargo near the rear of the bed. The seal compresses around the tailgate in both positions, maintaining a weather-tight barrier.
The MX4 installs over most factory drop-in bed liners and spray-in liners. If you have a drop-in liner, the clamps may require slight adjustment to account for the liner’s thickness. Spray-in liners typically don’t affect installation at all, since the clamps bolt into the stake pockets above the liner surface.
The cover supports up to 300 lb of evenly distributed weight when fully latched. You can walk on the closed panels or stack light cargo like camping gear or coolers. Avoid placing concentrated point loads — like standing on one corner — which can dent the aluminum over time.
Yes, when folded to position 4. The panels stack completely against the cab, leaving the bed floor clear for hitch installation and towing. You can fold the cover open before hooking up a trailer, then close it again when the hitch is removed. The cover does not interfere with hitch operation in the folded position.
No. The MX4 is designed to stay installed during automatic or touchless car washes. The clamps and hinges are corrosion-resistant, and the matte powder-coat finish won’t peel or fade from high-pressure spray. Just make sure the cover is fully latched before entering the wash bay.
The MX4 uses thicker aluminum panels and a more robust hinge design than the G2. Both covers fold in four positions and install without drilling, but the MX4 offers a higher load rating and better long-term durability in extreme weather. The G2 is lighter and costs less, making it a solid choice if you prioritize weight savings over maximum load capacity.