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E60 M5 (2006 - 2010)

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  #1  
Old 08-13-2013, 01:56 PM
Ebaye60 Ebaye60 is offline
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Location: Cedar hill MO
 
Join Date: Aug 2013
Posts: 4
Mein Auto: 06 M5
Rear cats removed now error code

This is my First time posting I Just joined yesterday. I purchased a 2006 m5 from eBay a few months ago And it has a few bugs I'm trying to work out. One of them is the increased emissions code, supposedly it came on when the rear cats were taken off, But after talking to the dealer and Turner Tuner there should be no issue since the cats are after the O2 sensors. I was just curious if anyone else has had this problem.
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  #2  
Old 08-20-2013, 09:06 PM
imae34driver imae34driver is offline
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Location: Orange County , CA
 
Join Date: Feb 2013
Posts: 1,899
Mein Auto: 1995 540i SPORT /6 spd
Bbl post sry
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  #3  
Old 11-07-2013, 06:30 PM
08M5V10 08M5V10 is offline
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Location: miami
 
Join Date: Oct 2013
Posts: 20
Mein Auto: 2008 M5
Had the same issue, but the reason I had the increased emissions is because I had a bad coil, therefor gas was not being burned off and the fuel was dumping into the cat. I replaced the coil and cleaned the mess, a had a mechanic clean the sensors and reset the error codes. All is good for now.
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  #4  
Old 11-07-2013, 08:46 PM
Ebaye60 Ebaye60 is offline
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Location: Cedar hill MO
 
Join Date: Aug 2013
Posts: 4
Mein Auto: 06 M5
Did diagnostic show bad coil or was it trial and error? I have now had two dealers diagnose it and both say its primary cats. But it does cut out every once in a while when it is warming up.
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  #5  
Old 11-08-2013, 03:13 PM
08M5V10 08M5V10 is offline
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Location: miami
 
Join Date: Oct 2013
Posts: 20
Mein Auto: 2008 M5
Diagnostic codes were for cylinder #9 bad coil. The dealership wanted to charge 1,500.00 to change the spark plugs and replace "1" coil. If your car is under warranty then you have nothing to worry about, if not try to find a repair shop that specializes in BMWs. Did you search you tube for the same issue? Try DIY to see if you can figure out that it's not a sensor... I'm not mechanic, just trying to save you some cash. Best of luck!!
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  #6  
Old 11-08-2013, 04:27 PM
Ebaye60 Ebaye60 is offline
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Location: Cedar hill MO
 
Join Date: Aug 2013
Posts: 4
Mein Auto: 06 M5
My cats should be under warranty but previous owner removed secondary cats and resonator therefore modifying exhaust. I was just hoping they were wrong about the primary being bad. There is no way I'm buying new cats so now I will see if I can just gut them and buy a tune that eliminates error code.
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  #7  
Old 12-02-2013, 07:12 PM
bimmertech113 bimmertech113 is offline
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Location: TN
 
Join Date: Sep 2012
Posts: 51
Mein Auto: a car
Rear cats removed now error code

I've had a few m5's need cats. Only the front ones are monitored. Goo luck getting it warranted though. Best bet is to buy or borrow another m5's rear exhaust, install it, and take it to the dealer.


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