jlfents;c-141341 wroteFrom what you guys are saying it sounds like the 850 tanks use a crappy plastic. Either way I don't see what the big deal is - its just a plastic tank. If it holds liquid it still has life in it. When it gives in clean up the mess and replace it.
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It's more than 20 years old.....
When it fails it takes the head gasket with it, guaranteed 95% of the time. End of car then.
A brand new genuine one is under 150. Why risk your car?