Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
I have 2011 EL LIMITED that i use for limousine service and door gets open 50 times per day and they still work. We have 2007 Lincoln Navigator with 300K plus miles and they still work. What is the key? Every oil change lubricate the hinges with white lithium grease. What breaks them? Usually ice and frozen snow stuck between hinges which makes motor work harder and they fail.
I had one side replaced after an accident. The Ford part is $2500 for the full step assembly (the only way it is available).