That's probably a question you should ask a lawyer. With all the technical jargon who knows. However, if it was a recall and that particular car never received the work I would think they would be responsible for it. It kind of depends on whether or not the recall had an expiration date.
manifold or downpipe gaskets may be leaking gases or worse, cracked manifold
A cracked/warped head, Blown head gasket, cracked cylinder wall, or cracked/warped intake manifold.
It must be REPLACED with another 1.
IT depends on if IT's an INTAKE or EXHAST MANIFOLD.
if it is the intake manifold YES, exhaust manifold NO.
what is the cost of repair of Toyota 4runner exhaust manifold
Depending on the location and size of the crack, you may be able to have it welded shut or you may have to replace the manifold.
Blown head gasket and/or cracked head.
The head gasket or actual cylinder head is cracked.
Cracked intake manifold...
Probably a cracked cylinder head.
An exhaust leak is usually the result of a bad gasket or a cracked manifold. For a proper fix, either the gasket or both the manifold and the gasket must be replaced.