1.8T ball and socket tensioner

[Go Cubs]

Help! The ball and socket tensioner of my A4 1.8T (57,000 miles) has failed. 
My mechanic said he can put it back together but that there is a chance that it will fail again and could potentially cause serious damage. 
He is suggesting I replace this with a new improved timing belt tensioner.
Advice?
Thanks.
 

		
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