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  • Saturday: Closed
  • Sunday: Closed


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Undercover Flex Tonneau Cover FX51005

Product Information
List Price:
Our Price:
5 (1 review)
Part #:
2004-2015 Nissan Titan w/o Utili-Track System, 5'7" Bed
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Ships Mar 29th - Apr 3rd


Measure Your Truck Bed for a Tonneau Cover

Does your truck have a track system?

  • Ultra low profile fit enhances your truck's looks
  • Unique folding design allows for full access to the bed
  • Fiberglass reinforced panels are light and very strong
  • Can support up to 400lbs on top of cover
  • Cover can't be opened when tailgate is locked
  • Folding section can be easily removed if needed
  • Drain system keeps water out of the bed
  • Mounting is easy since there is no drilling involved
  • Comes in a UV protected textured black finish
  • Proud supporter of Building Homes for Heroes
  • Made in the USA - Rogersville, MO

Choosing a tonneau cover for your truck can be extremely difficult given the number of choices available in today's market. Most covers will require you to compromise on either security or access to your truck bed. If you're the kind of truck owner that needs a secure cargo area, but also needs the full truck bed, then an UnderCover Flex tonneau cover may be the right choice for you.

The Flex truck bed cover is made from fiberglass reinforced panels with an aluminum frame. UnderCover chose to go with this type of panel since they are stronger, lighter, and very resistant to dents or scratches. The cover clamps onto the rails of your truck bed, giving the Flex a super low profile appearance. UnderCover has also added prop rods to hold your cover in the upright, folded position which allows you to use the full truck bed. The folding section can even be removed without any tools if you are hauling a load you need to keep an eye on.

Mounting your UnderCover Flex cover will be one of the easiest thing you could possibly do on your own. The only thing necessary for installing the cover is a 9/16" wrench. Trucks without drain holes or with a bed liner may need to do some minor trimming or drilling to get everything installed properly. Once you have this tonneau cover installed correctly, the rubber seals and drain tubes should keep your bed nice and weather resistant. No cover can be 100% watertight but the Flex is pretty close!

With the number of different tonneau covers out there, there are a lot of factors to consider. UnderCover has always been a leader in the tonneau cover industry and all of their bed covers are made in the USA and backed by a 3 year warranty. Once you weigh all the functionality, security, and manufacturer history that comes with it, choosing an UnderCover Flex tonneau cover should be an easy decision for you to make!

Manufactured by UnderCover, a Truck Hero company.

View Available Part Numbers For This Product Line


Watch This VideoUnderCover Flex l Hard Tri-Folding Bed Cover Overview
Watch This VideoUnderCover FLEX Installation on Toyota Tacoma | The Mountain Project


Product Reviews Summary

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Part #: UDC-FX51005 Posted on
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- Nissan Titan (San Antonio, TX)
Price / Value
Ease of Installation
I hesitate a lot as when I started seaeching, the price scared me. But finally decided to purchase. Received it 2 days earlier and installed myself without any help in less than 30 mins.

My Titan looks great and I'm very happy !


3 Year Warranty

UnderCover Flex truck bed covers are backed by a 3 year warranty against defects in materials or workmanship


Installing the Flex model bed cover from UnderCover is easy and simple enough to do right at home. Your tonno has been designed to mount using common hand tools without any drilling or cutting needed. Some models may need to have some drilling done to properly install the drain tubes. We are always happy to answer any questions you might have about any UnderCover product. Feel free to call us at 1-877-216-5446 or 701-253-5906 for any additional information.

Watch This VideoUnderCover FLEX Installation on Toyota Tacoma | The Mountain Project