So, the links are definately more likely to wear out faster when driven on rougher roads, every bump, even cracks in the road, are an impact on the joints in the end link. Also there’s the possibility that the factory links were replaced with lower quality aftermarket links that just wear out easier

 

My Moog end links have been on the car for many years now, I grease them yearly.

 

Sway bar links typically go bad when the rubber sealing boots fail/get damaged, let water in, contaminates the internal grease, and allow rust to form around the pivots. Usually results in a clunking noise when going over uneven bumps in the road as the joint surfaces wear from the lack of lubrication. I've installed cheap (ungreaseable) links before which have only lasted 1-2 years so it's definitely possible they may need to be replaced often if regularly used on rough roads. The greaseable links (Moog), in theory, will last much longer if grease is added regularly. I add a pump of waterproof marine grease to mine twice a year (car lives in the rust belt) and have had them installed for about 2 years now with no issues.

 

Not on dirt roads. Mine lasted 50k.

 

thanks!
My mechanic comped by about 50% of the parts / work even though they were 1 year out of warranty. Good of him.
I put Moog's on my first Subaru (legacy) 6 years ago and they were great. Current mechanic doesn't love my bringing my own parts, but I'll request they bring them in next time I need any end link work and get them greased with every service!

cheers,
Dave

 

Do you know what brand the replaced end links were?