Quote:
Originally Posted by russv
I would classify it as abnormal because fuel pumps don't make intermittent loud chirping noises. The fact that Toyota and Subaru have issued TSB's indicates they think it is abnormal as well. And could it not be an indicator of a future failure and consequent fire? THAT would be undesirable.
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Highlighted the most important part of that statement there. And yes, they do, as has been stated multiple times from a dozen different sources.
The TSB itself says that the noise isn't abnormal, it's undesirable. A TSB isn't admission of a faulty part. There's been plenty of TSBs for undesirable characteristics on vehicles that aren't broken or damaged, or have any impact on the car outside a bruised ego. Abnormal indicates there is an actual problem, which there is 0 evidence of in this case.
Also, the "consequent fire" you are referring to was a result of poor workmanship and shoddy mechanics. It has nothing to do with the chirping being discussed here.