Originally Posted by Imp4
And as for what causes it to leak, we are talking about a 12 year old vehicle here with 130k+ on the clock. There's 127 reasons why it's started to leak now.
Interesting that the plastic top radiators in every older German vehicle Ive owned (81, 82, 83, 85, 2x91) have all been original, a number of them having >>200k on top of the decades old age.
Meanwhile, the radiator on my parents 94 Previa was the only thing that failed more than once on that van, which was super reliable and great until Hurricane Sandy caused its demise with >230k.
I think I'd argue Toyota (and Honda, personally encountered two integrals with hairline cracks in the radiator tops) don't make their radiators thick or robust enough.