According to an article in Cheatsheet.com, Ford Motor Company recalled 747, 000 Fords and Lincolns on April 29th, in an 
action affecting four models. The media.Ford.com page it refers to, however, seems to indicate the recall affects only a little over 500,000 vehicles and three models. Writing for Cheatsheat.com, Micah Wright says in his May 3rd article:
On April 29, Ford issued another recall, covering four different models in the Ford/Lincoln lineup, and one that directly effects more than 747,000 vehicles. It’s news we hate to hear, especially on the coattails of a series of recent rollouts, but for the sake of safety, it must be done. We’ve seen what happens when potential defects get swept under the carpet, only to reemerge later as a series of lawsuits and court hearings. All told, 518,313 of the vehicles affected are badged under the 2013-2015 Ford Fusion and Lincoln’s MKZ models, along with the new 2015 Edge. This widespread Ford Fusion and Lincoln recall is directly related to corroded bolts that thread into the steering-gear motor. Corrosion from salted roads can lead to bolts shearing off, causing the steering system to default as the vehicle becomes tough to keep under control. The bolt-corrosion recall also involves vehicles sold in seven Canadian provinces. In its official statement, Ford says that “customers located in non-corrosion states or provinces will be covered by extended warranty if they experience similar concerns.”
Here’s Ford’s version of the story:
Ford is issuing a safety recall for approximately 520,000 2013-15 Ford Fusion and Lincoln MKZ vehicles and certain 2015 Ford Edge vehicles in corrosion states and provinces in North America (actual 518,313) for steering gear motor attachment bolts that may fracture due to corrosion cracking. If the steering gear motor bolts fracture, the steering system may default to manual steering mode, making the vehicle more difficult to steer, especially at lower speeds. This would not result in a loss of steering, but could result in an increased risk of a crash. Ford is not aware of any accidents or injuries related to this condition. Affected vehicles include certain Ford Fusion vehicles built Feb. 3, 2012 to March 19, 2015 at Hermosillo Assembly Plant; certain Ford Fusion vehicles built Feb. 3, 2012 to March 13, 2015 at Flat Rock Assembly Plant; certain Lincoln MKZ vehicles built Feb. 3, 2012 to March 20, 2015 at Hermosillo Assembly Plant; and certain Ford Edge vehicles built Feb. 26, 2015 to Feb. 28, 2015 at Oakville Assembly Plant. There are 487,301 vehicles in the United States and federalized territories and 31,012 in Canada. Vehicles included in this recall were either originally sold in, or are currently registered in Connecticut, Delaware, District of Columbia, Illinois, Indiana, Iowa, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Vermont, West Virginia and Wisconsin. Also included are the Canadian corrosion provinces of Ontario, Quebec, Prince Edward Island, Newfoundland and Labrador, Nova Scotia and New Brunswick. Customers located in non-corrosion states or provinces will be covered by extended warranty if they experience similar concerns. Dealers will replace steering gear motor attachment bolts on customer vehicles with new bolts, seal them, and replace damaged steering gears at no cost to the customer.
One thing every can seem to agree on is this: Bolts can rust, and rusty bolts can lead to dangerous driving situations. The best way to prevent rusty bolts is to give your car a modern rustproofing treatment. In New Hampshire, advanced-technology rustproofing is available from The Rust Stop Pros.
Here is the first part of our 2017 workshop series.
What’s covered in this video; Part 1
1) introduction into NH Oil Undercoating® Oil-based Rustproofing
2) surface preparation and inspection
3) the science behind Oil-based Rustproofing ( how it works )
4) equipment and maintenance
Covered in next video Part 2; Application