Fiat Chrysler Automobiles is recalling about 1.1 million Ram 1500, 2500, and 3500 pickup trucks from six model years because the tailgate limiter tab may fracture and cause the tailgate to unlatch and open while driving, according to federal documents.

If the tailgate opens while the vehicle is in motion, cargo may fall out and create a road hazard, increasing the likelihood of a collision.

Specifically, the recall includes certain 2015 to 2017 Ram 1500, 2500, and 3500 pickup trucks equipped with an 8-foot bed and a power locking tailgate. In addition, it includes all 2013 to 2014 and 2018 Ram 1500, 2500, and 3500 pickup trucks built before April 1, 2018 with a 6 or 8-foot bed and a power locking tailgate. On Aug. 29, FCA expanded the recall to include an additional 693,128 model year 2013 to 2014 Ram 1500, 2500, and 3500 pickup trucks.

The automaker notes that 2015 to 2017 Ram 1500 pickup trucks with truck beds other than 8 foot, are currently covered under NHTSA recall 18V-486 for this issue.

To fix the problem, Chrysler will notify owners, and dealers will repair the tailgate latch, at no cost to owners.

The recall began May 23. Chrysler plans to notify owners of the expanded population on Oct. 18. Owners can reach FCA customer service at (800) 853-1403. FCA's reference number for this recall is V44.