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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E39 (1997 - 2003)

E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 02-07-2013, 03:36 PM
rpurkiss rpurkiss is offline
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Location: Visalia, CA
 
Join Date: Jan 2013
Posts: 6
Mein Auto: 2003 BMW 525i
P0720 Code

I pulled codes and it read P0720. After two weeks I took it into the shop. They tried replacing the batter due to low voltage and that didn't change anything. Next step he said was to replace the transmission. I asked him to replace the output speed sensor first. I don't understand how the transmission needs to be replaced if it running/shifting fine with no issues. Any suggestions?
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  #2  
Old 02-07-2013, 03:48 PM
5series92 5series92 is offline
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Location: Maryland
 
Join Date: May 2012
Posts: 86
Mein Auto: 540i sport
It could be the wiring going to the transmission position switch. I'm going through this problem right now, it only happens when the gears I'm in don't show on the instrument cluster turning the car off and back on solves the problem but then it comes again I'm taking it to a BMW indie to have it checked out I hope it's not the switch as it an expensive part.
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Old 02-07-2013, 04:49 PM
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dtadrian dtadrian is offline
BMW's are like women. $$$
Location: miami
 
Join Date: Jul 2012
Posts: 460
Mein Auto: 1999 BMW 528i T Wagon
What year and model is your e39? Reason they said replace it because the zf transmissions are known to fail more than the old GM transmissions.
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Old 02-08-2013, 10:31 AM
rpurkiss rpurkiss is offline
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Location: Visalia, CA
 
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Posts: 6
Mein Auto: 2003 BMW 525i
It's a 2003 525i with 159k miles. Ordered the output sensor for installation next week. Looking at $600.
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