BAKFlip MX4 for Toyota Tundra | Hard Folding Truck Bed Cover
Our BAKFlip MX4 is engineered specifically for Toyota Tundra owners who demand the perfect balance of security, style, and versatility. This premium hard folding tonneau cover features marine-grade aluminum panels with a rugged matte finish that complements your Tundra’s factory lines.
The four-panel design lets you fold the cover forward in sections, giving you instant access to your cargo while maintaining up to 90 degrees of bed coverage when partially opened. Whether you’re hauling lumber, securing tools, or protecting gear from the elements, the MX4 adapts to your workday.
We designed the MX4 with exclusive AutoLatch™ automatic locking that secures your bed at the tailgate with no clamps, straps, or Velcro. Installation takes about an hour with basic hand tools and our detailed instructions. The cover sits flush with your Tundra’s bed rails for a clean, integrated appearance that improves aerodynamics and fuel efficiency.
What Makes the MX4 Stand Out
Aluminum Panel Construction & Finish
We build every MX4 panel from marine-grade aluminum that resists corrosion, dents, and UV damage season after season. The panels feature a powder-coated matte black finish that matches your Tundra’s texture and hides fingerprints, scratches, and everyday wear better than glossy alternatives.
Each panel measures approximately 90 mm thick at the hinge points, providing structural rigidity while maintaining a low profile above your bed rails. The aluminum construction keeps the entire cover lightweight enough for one person to operate while delivering the security of a hard cover. Our proprietary hinge system allows panels to rotate smoothly through their full range of motion without binding or requiring lubrication.
Folding Configurations & Cargo Access
The four-panel design gives you multiple opening positions to match your hauling needs. Fold the first panel for access to items near the tailgate. Fold two panels to create approximately 90 cm of bed access from the rear. Continue folding all four panels forward against the cab for complete bed access when transporting tall cargo or using your Tundra for landscaping projects.
Each panel locks in the upright position as you fold it forward, so you don’t need to hold the cover while loading or unloading. When you’re ready to close the cover, simply unfold the panels rearward until they lie flat. The AutoLatch™ system automatically engages when the final panel reaches the tailgate.
Installation Process for Tundra Models
We designed the MX4 for straightforward clamp-on installation that preserves your Tundra’s factory bed and doesn’t void warranties. The system includes pre-assembled side rails that clamp to your bed rails using adjustable hardware—no drilling, cutting, or permanent modifications required.
Start by positioning the side rails along your bed rails and hand-tightening the clamps. Our included spacers ensure proper fit across different Tundra generations and bed rail profiles. Once the rails are aligned, tighten the clamps to the specified torque. The cover panels arrive fully assembled, so you simply set them onto the installed rails and secure the front header.
Complete Your Tundra Bed System
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Common Questions About the MX4 Tundra
We manufacture the MX4 for Toyota Tundra 5.5-foot and 6.5-foot bed lengths across model years 2007 to present. Each cover is engineered for specific generation bed rail profiles to ensure precise fit.
When ordering, you’ll need your Tundra’s year, cab configuration, and exact bed length. The MX4 works with Double Cab and CrewMax configurations. Our fit guide verifies compatibility with your specific Tundra during the configuration process.
Yes, you can safely drive with the MX4 in any folded position. Many owners drive with one or two panels folded forward to haul longer cargo while maintaining coverage over items stored near the cab.
Each panel locks securely in the upright position, so there’s no risk of panels falling during highway driving. The aerodynamic design minimizes wind resistance even when panels are folded. We recommend securing any cargo that extends beyond the bed with appropriate tie-downs per your Tundra’s load capacity.
The AutoLatch mechanism automatically engages when you close the cover’s final panel at the tailgate—no manual latching required. The system locks the cover securely and can only be released from outside the bed when your Tundra’s tailgate is unlocked.
This provides integrated security with your truck’s factory lock system. When you unlock and open your tailgate, you can release the AutoLatch with a simple lever pull to access your bed. The design prevents access to the latch from inside the bed or by reaching through the tailgate.
The MX4 is fully compatible with Toyota’s factory deck rail system and most aftermarket track systems. The cover’s side rails mount to your bed rails above the track system without interfering with tie-down points.
You’ll maintain full access to your track’s sliding cleats and anchor points for securing cargo. The MX4 also works with most bed mat installations. For specific accessory compatibility questions, our product specialists can verify fit with your exact setup before you order.
Both covers share the same four-panel folding design and AutoLatch system, but the G2 features a gloss black finish instead of the MX4’s matte finish. The G2 also includes an upgraded seal system with additional weather stripping.
The MX4’s matte finish better hides scratches and fingerprints for work truck applications, while the G2’s gloss finish offers a show-truck appearance. Both covers provide the same security, load capacity, and installation process. Your choice comes down to finish preference and budget.
The MX4 sits approximately 90 mm (3.5 inches) above your Tundra’s bed rails when closed, maintaining a low profile that doesn’t obstruct your rear window view. The flush-mount design means the cover sits level with the bed rails rather than adding bulk above them.
This low profile preserves most of your bed depth for cargo. When you need maximum vertical clearance, fold all four panels forward against the cab—you’ll have full bed height available from the cab back to where the folded panels rest.
Yes, our BAKBox 2 tonneau toolbox is specifically designed to integrate with the MX4. The toolbox mounts between the cover and your Tundra’s cab, providing secure storage for tools and valuables without taking up bed space.
The BAKBox installation requires no modifications to your MX4—the cover’s front panel simply rests on top of the closed toolbox. You can access the toolbox independently of the cover, and you maintain the full folding functionality of all four MX4 panels.