What does this thing do?

It's designed to make your mechanic richer as he charges you several hours labor to identify that "weird suspension noise at the back of the car, innit".
 
I think this says it all :D

GlMOS.jpg
 
I read POS exactly the same way. Ive just taken up cardsave for my processing, and whenever they mention POS terminal, POS system etc, I really have to supress a snigger!
 
If this thing actually did what it claims to do it would be fitted as standard by the car manufacturers, good mpg figures sell cars these days.
 
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