If you're asking is it terminal, no it's not..
If you're asking is it 'spensive, yes it is.
The hoses that serve it turn to junk, causing the secondary air pump to fail.
I have been driving around with it broken for my trip east. Sooner or later it will cause damage to the emissions system, but stealer said no worries for a couple K, so doing it in Fall, me.
(300, dancer avatar here)

__________________
carpe` cevesi
knf

01 topaz e53 3i 5m 120k mi =
$9.7K + $2.4K when seller says "needs nothing" (131K)

Drew Cary: I love driving stewpid in hella thunderstorms.. I roll stop-signs.. get pulled over, the high-school cop says, "Do you know why I pulled you over?"
I say, "Sure.. do you know why I did it?"

2012 Election: Congress has determined that government beatings of all taxpayers must continue until morale has improved

Gone: '67 Galaxie LTD 2D aqua, 72 Pinto, 76 Elite, e12 track.. long road