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Old 01-16-2013, 12:10 AM
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07 E63650i 07 E63650i is offline
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Location: Southern California, USA
 
Join Date: Jan 2013
Posts: 2,963
Mein Auto: 2007 BMW E63 650i
Quote:
Originally Posted by Yorgi View Post
Yes, the petrol cap that you need to remove every time you fill up the car.

There is a rubber seal on this cap that dries out over time and compresses after hundreds of removals, resulting in a less-than-air-tight seal. All modern (OBDII) emission systems pressurize the fuel/petrol tank. Any loss in pressure triggers a check engine light - the assumption being if pressure is leaking from the tank so are fuel vapours into the environment.

Germans are notorious for using low silicon content plastics and rubbers because they are very environmentally conscious. They want the plastics used in cars to eventually break down once the car is retired. The problem is that the plastics start breaking down too soon, within 8 to 10 years, and you start getting all sorts of electrical connection issues and plastic hoses/tanks failing.

The Asians are not afraid to use high silicon plastics and this is one of the reasons they have greater reliability over the Germans.
Ah, that explains why Asian vehicles tend to have better reliability. My theory is that BMW is very good at 'planned obsolescence'.
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