BAKFlip MX4 (Gen 3) Hard Folding Tonneau Cover for Tundra (2022+)

Upgrade your truck bed security and weather protection with the BAKFlip MX4 (Gen 3) hard folding tonneau cover. Built with reinforced aluminum panels and a high-density polymer core, this latest-generation MX4 is stronger, more secure, and easier to install than previous versions. It delivers a flush, low-profile look while maintaining full bed access and theft-resistant protection.

This Gen 3 design features upgraded auto-latching panels, improved perimeter seals, tighter-fit clamps, and a faster click-in installation system — making it one of the most refined hard folding covers available for the Toyota Tundra.

Important note

• Vehicle fitment: Toyota Tundra 2022+
• Bed length: 5'7" / 66.7" bed only
• Part numbers: 448440, 448441
• Trail Special Edition: Will not work with Trail Special Edition storage boxes
• Tie-down cleats: Must be removed if equipped and cannot be reinstalled
• Install type: No-drill clamp-on installation for most applications

Features

• Gen 3 upgrade: More secure and more durable than Gen 2 design
• 22% stronger panels: Aluminum top panels with high-density polymer core
• Auto-latch security: Patented automatic latching system with improved lock components
• Weather protection: Upgraded EPDM seals and tight-fit clamps help keep water out
• Flush profile: Sits level with bed rails for a clean OEM-style appearance
• Tri-fold access: Fold toward the cab for partial or full bed access
• Full bed use: Drive safely with cover folded fully upright and secured
• Extreme-condition tested: Validated from -40°F to 180°F and high humidity
• Matte black finish: Textured, scratch-resistant surface
• Cab protection: Premium rubber bumpers protect cab when folded upright
• Brake light visibility: Third brake light remains visible in all positions

Construction and performance

• Panel material: Heavy-duty aluminum with polymer core
• Frame and rails: Precision-engineered aluminum
• Finish: Textured matte black
• Weight capacity: 400 lbs evenly distributed
• Drainage: Integrated water management and drainage system
• Seals: Re-engineered perimeter and extended tailgate seals

Installation

• Install time: 30 minutes or less
• Difficulty level: Level 1 – simple installation
• Design: New click-in rail system — about 12% faster than previous version
• Tools: Basic hand tools only
• Drilling: Not required for most applications
• One-person install: Designed for solo installation

What’s in the box

• Hard folding tonneau cover
• Side rails
• Clamp set
• Hardware kit
• Installation guide

Warranty

• Coverage: 5-year limited warranty
• Eligibility: Original purchaser only with proof of purchase
• Scope: Covers structural defects in materials and workmanship
• Exclusions: Damage from misuse, improper install, modification, or normal wear