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E12, E28, E34, E39, E60 General discussion and technical help for all year 5 series cars.

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Unread 08-27-2009, 03:24 PM   #1

Name: jkork
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Your Ride: 1999 540i

I own a 1999 540i w/ 83,000 miles; the check engine light came on, stayed on for a day then went off. 4-5 start ups/shutdowns it hasn't "re-lit"

At 76,000 miles the light went on and stayed on- diagnosis resulted in replacing the MAF sensor.

Do I need to to be concerned? Does this require another trip to the local de3aler?

Your comments are appreciated
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Unread 08-27-2009, 04:30 PM   #2
Big Evil
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Name: Big Evil
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Your Ride: 1994 BMW 525i, 1987 325is, 1986 325
A lot of times a loose gas cap will cause an evap emissions failure. You stop fill up, tighten the cap and within a few run cycles it goes away. Is that what happened? maybe. But if the light went out and you're not having any other problems I wouldn't get to concerned until it comes back on........if it ever does. By the way this needs to be moved into the right category, you'll get more, better responses.
Big Evil, The BMW driving monster of the American Southwest (Currently on BMW #5)

Last edited by Big Evil; 08-27-2009 at 04:40 PM..
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