Toyota Repair: 2005 4Runner leaking struts, 2005 toyota 4runner, toyota 4runner

Question
I have 2005 Toyota 4Runner that I purchased new.  I felt lots of vibration on the highway less than a year from my purchase date so I took it back to the dealer to get it check and the mechanic told me everything was fine and he did balance the tire.  The vibration didn't go away but I thought it was normal. I rotate my tire several times and had a alignment done as well because the vibration didn't go away.  On my last tire check, the mechanic found out that all of my struts were leaking and he said it was way too early to have strut leaking and a chance of having all four leaking at the same time was rare.  I asked two other mechanics for second opinion and they both told me the same thing. I currently have 51,000 miles on my SUV and I think the struts started leaking at 45,000 miles but not obvious.  Do you think is normal for struts to leak at 50K miles? Could it be defected struts? Do you know any recall concerning 2005 4Runner struts?  Thanks for your help.

Answer
It does seem to early for struts to be leaking but if they are then they should be replaced. Struts normally don't cause a vibration such as your'e describing and by the way, if the struts are just seeping a little on the top it's considered normal, a leak is defined as fluid leaking down the struts to the spring seats. Back to the vibration, does it seem to be in the steereing wheel or does the whole car vibrate, can it be felt in the seats?