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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 11-20-2012, 04:17 AM
HBomb B3 HBomb B3 is offline
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Location: Boston, MA
 
Join Date: Jun 2012
Posts: 24
Mein Auto: BMW 540i
Magnaflow Cats question

Hi guys. I need to replace my cats. I live in Massachusetts. Does anyone know which cats work (model number) with my 1998 540i? I've read different posts, and are not sure which are the right ones. Thanks!
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  #2  
Old 11-20-2012, 10:07 AM
edjack edjack is offline
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Location: San Jose, CA
 
Join Date: May 2007
Posts: 9,014
Mein Auto: '97 540i 6 speed
Try the Magnaflow web site and get a recommendation. http://www.magnaflow.com/02catalytic...ayproducts.asp

I installed a pair of the CA cats. Very pleased with the construction and increased throttle response. Replace all four sensors at the same time.

http://www.realoem.com/bmw/showparts...00&hg=18&fg=10

If you choose to replace with direct fit units, you'll need eight items 4 and 5, and four item 3. You may need other parts, depending on how many parts you break removing them. Mine did require a small adjustment to fit, so you may just want to buy the weld-in units.
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Ed in San Jose '97 540i 6 speed aspensilber over aubergine leather. Build date 3/97. Golden Gate Chapter BMW CCA Nr 62319.

Last edited by edjack; 11-20-2012 at 10:08 AM.
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