i have resoldered mine several times on several different cars. it's a common problem. i'm not so sure it's vibration that causes the problem though. it may be the component on the circuit board itself. some components get warm when in use. the warming and cooling will crack the solder joint. i repaired my mig welder that had the same problem. i've also repaired 2 of my t.v. sets, same thing. no vibration on the t.v.'s. just cracked joints from the heating and cooling of the individual component. with the expansion and contraction the solder gets work hardened and fails. much like bending a piece of metal back and forth until it breaks. that's my 2 cents. J.O.