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And yet something very basic is wrong here that we've seen repeated failures.
1) Incompatible materials composition. Seems unlikely (especially twice...) given that we are not dealing with a totally new system. It's oil & known blow-by combustion gases.
2) Build specification. Not related to quality - as in an engineering specification problem that results in an underrated construction for the pressures, temperatures, etc.
3) Construction quality - as in a bad supplier. Either for chemical resistance or build consistency, the hose is riddled with defects.
4) Fatigue - movement / vibration that damages even a good product.
Items 1-4 should have been addressed in Toyota's internal reliability and stress-testing regiment.
5) Installation issue - maybe the act of pushing it on and siding it down over the two metal ends, it is getting kinked, crushed or otherwise damaged.
To me, the biggest disappointment is not that failures occur, because we all know S**t happens. It's how Toyota is handling the occurrences that appalls me.
New add after reading some of the other forum comments:
6) Fraud... As in the dealer claims to have changed out the defective line, but never actually did. He pockets the warranty money and you are left with a defective part. You would think that this will eventually come back to bite the dealership when the old line blows and a district investigator questions why/how this could have happened. Maybe nobody cares, and National hasn't caught on yet.
If #6 was actually the predominant cause of failure, then all concerns about new replacement rubber going bad is highly overblown, and we have nothing to worry about going forward. Just check and be sure that you have the "Yellow Stripe" and all will be well. Believe it? We need more data......
Last edited by Fibber2; 03-14-2013 at 04:25 PM.
Reason: Item #6