BAK 449426TS BAKFlip MX4 TS Tonneau Cover 16-23 Toyota Tacoma 5'1" T-Slot Rails

Vehicle Fitment

• 2016-2023 Toyota Tacoma (All Trims, 5 ft. 1 in. Bed, 60.5" inner bed length, Access Cab and Double Cab) - WITH OE Factory Deck Rail System - SR, SR5, TRD Sport, TRD Off-Road, Limited, TRD Pro

Fitment Notes

• This SKU is specifically designed for 2016-2023 Tacomas equipped with the factory OE Deck Rail System - trucks without the factory deck rail require a different part number
• Does NOT fit Trail Special Edition models equipped with factory in-bed storage boxes
• Fits the 5 ft. 1 in. short bed ONLY - the 6 ft. 2 in. Tacoma long bed requires a different part number
• Fits the third-generation Tacoma (2016-2023) ONLY - the 2024+ fourth-generation Tacoma and 2005-2015 second-generation Tacoma each require different part numbers
• Racks, crossbars, cargo baskets, and other T-slot accessories are sold separately - only the cover and T-slot side rails are included
• No-drill installation for this application - all required hardware and click-in clamps are included

Features

• Integrated T-slot side rails are the defining feature of the MX4 TS - allowing fast, secure mounting of aftermarket crossbars, racks, cargo baskets, carriers, rooftop tents, and a variety of cargo management accessories without additional drilling or brackets
• GEN 3 upgrade delivers 22% greater panel strength over the original MX4 design, achieved through high-density polymer-reinforced aluminum top panels and precision-engineered aluminum side rails
• Multi-Shield™ proprietary matte black coating provides 11x greater surface durability - absorbs impacts, resists dents, scuffs, and scratches, and is fully UV-resistant for years of outdoor use
• Re-engineered automatic latching system improves forced-entry resistance over the GEN 2 design - panels lock automatically as the cover closes
• Hard tri-fold design provides 100% full bed access - fold all panels against the cab, secure with heavy-duty re-engineered prop rods, and drive open with full rear window visibility
• Premium rubber bumpers protect the cab from contact when the cover is in the upright open position
• Rated to hold 400 lbs. of evenly distributed weight on top of the cover
• Upgraded EPDM rubber perimeter seals with all-new tight-fit clamps deliver superior weather resistance over the GEN 2 design
• Dual-action tailgate seal allows the tailgate to be opened or closed regardless of the cover's position, with full factory tailgate functionality maintained
• Integrated water drainage channels and tubes funnel any moisture out of the bed
• Ultra-low-profile, flush-mount design sits level with the bed rails for a clean, factory-integrated appearance
• Full 3rd brake light visibility maintained in all cover positions - open, folded, or closed
• Tested in conditions from -40°F to 180°F and 0-95% humidity for all-season reliability
• Improved click-in installation design reduces setup time by 12% over previous MX4 generations
• Bed stake pockets remain fully accessible for additional accessory installation
• Assembled in Missouri, USA with globally sourced materials, backed by a 5-year limited warranty

Specifications

• Bed Fit: 5 ft. 1 in. (60.5" inner bed length) - 2016-2023 Toyota Tacoma with OE Deck Rail System
• Generation: GEN 3 (current production)
• Panel Material: High-density polymer-reinforced aluminum
• Rail Material: Precision-engineered aluminum with integrated T-slot channels
• Finish: Multi-Shield™ matte black specialty automotive coating (11x surface durability)
• Color: Matte Black (all surfaces, panels, rails, and hardware)
• Seal Material: EPDM rubber (revised full perimeter)
• Tailgate Seal: Dual-action (allows tailgate use in any cover position)
• Weight Capacity: 400 lbs. (evenly distributed)
• Folding Style: Hard tri-fold (folds against cab for 100% bed access)
• T-Slot Rails: Integrated in both side rails for rack and accessory mounting
• Installation Type: No-drill, click-in clamp-on
• Installation Time: 30 minutes or less
• Drain System: Integrated water drainage channels and tubes
• Locking Method: Patented automatic slam latches per panel; tailgate lock
• Key Lockable: No
• Temperature Range Tested: -40°F to 180°F
• Paintable: No
• Assembly: Assembled in Missouri, USA with globally sourced materials
• Warranty: 5-Year Limited

Included Components

• 1x BAKFlip MX4 TS GEN 3 Hard Folding Tonneau Cover (5 ft. 1 in. Tacoma deck rail fitment)
• 1x Aluminum side rail set with integrated T-slot channels and click-in tight-fit clamps
• 1x Hardware and fastener kit
• 1x Integrated water drainage system components
• 1x Vehicle-specific installation instruction sheet

Product Description

The BAK Industries 449426TS BAKFlip MX4 TS GEN 3 is the premium rack-compatible evolution of the world's best-selling truck bed cover, purpose-built for the 2016-2023 Toyota Tacoma with the factory OE Deck Rail System and a 5 ft. 1 in. short bed. The defining feature of the MX4 TS over the standard MX4 is its integrated T-slot side rails - precision-engineered aluminum bed rails with built-in T-slot channels that accept aftermarket crossbars, racks, cargo baskets, carriers, rooftop tents, and a wide range of cargo management accessories instantly and securely, without any additional drilling or brackets. For Tacoma owners who want to maximize both below-cover cargo protection and above-cover hauling versatility, the MX4 TS delivers both in a single, flush-mount package that sits level with the bed rails and practically disappears into the truck's profile.

The GEN 3 upgrade brings meaningful engineering improvements throughout. High-density polymer-reinforced aluminum top panels are 22% stronger than the original MX4, and the proprietary Multi-Shield™ matte black coating delivers 11x greater surface durability against dents, scuffs, and scratches compared to a standard finish - while remaining fully UV-resistant for years of outdoor exposure. The re-engineered auto-latching system improves forced-entry resistance over the GEN 2, with panels that lock automatically as the cover closes. Upgraded EPDM rubber perimeter seals and all-new tight-fit clamps hold the cover tighter to the bed rails than any previous generation, and the dual-action tailgate seal allows the Tacoma's tailgate to open and close in any cover position without restriction. An integrated water drainage system routes any moisture that reaches the rails directly out of the bed.

The improved GEN 3 click-in installation design reduces setup time by 12% over previous generations, and the entire cover can be installed in 30 minutes or less with no drilling required. When full bed access is needed, all three panels fold flush against the cab - heavy-duty prop rods lock the cover open and rubber bumpers protect the cab finish. Bed stake pockets remain accessible at all times for additional accessory mounting. Tested in extremes from -40°F to 180°F, assembled in Missouri, and backed by BAK's 5-year limited warranty - the strongest coverage in the class - the 449426TS is the ultimate hard-folding tonneau solution for third-generation Tacoma owners who demand both security and versatility.