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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 12-13-2014, 07:29 AM
bmwbob51 bmwbob51 is offline
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Location: Hpllister, CA
 
Join Date: Sep 2007
Posts: 19
Mein Auto: 2000 BMW 540i 6 speed
Coil Replacement

I have about 170K miles on my 2000 540i 6 speed and I've had 2 coils go bad. Replace all or replace as they go bad? Best replacement coil other than OEM.
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  #2  
Old 12-13-2014, 07:34 AM
poolman poolman is offline
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Mein Auto: 525i station wagon
Replace as they go bad---with Bosch
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  #3  
Old 12-13-2014, 08:41 AM
bobdmac bobdmac is offline
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Location: Back in Oaktown, Yay Area
 
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Mein Auto: 2001 540i/6, '90 BMW k75s
I agree with Poolman, replace them as they go bad. The coils seem to fail gradually, and once they do fail, they won't leave you stranded, especially with the V-8, which has seven other cylinders to keep the car moving. If you're concerned about the possibility of failure, just buy one spare to install as needed. It's a quick, painless process.

I replaced one on my cross-country road trip last year, after the stumbling or misfire became more frequent and pronounced. I haven't had another failure since then, and it's not as if there's a shortage of other things to spend money on with this car.
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  #4  
Old 12-13-2014, 08:42 AM
jordon jordon is offline
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Location: saskatoon, canada
 
Join Date: Jul 2011
Posts: 66
Mein Auto: E39 M5, E60 530i
Audi is famous for having coil issues. I used to drive audis with a spare coil in the trunk. I wish i was joking. But yes, as stated above, i would replace as they go bad. 8 coils would be pricey. You could always take the audi approach and keep one good one on hand. Good luck!
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  #5  
Old 12-13-2014, 01:57 PM
bmwbob51 bmwbob51 is offline
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Location: Hpllister, CA
 
Join Date: Sep 2007
Posts: 19
Mein Auto: 2000 BMW 540i 6 speed
Quote:
Originally Posted by bobdmac View Post
I agree with Poolman, replace them as they go bad. The coils seem to fail gradually, and once they do fail, they won't leave you stranded, especially with the V-8, which has seven other cylinders to keep the car moving. If you're concerned about the possibility of failure, just buy one spare to install as needed. It's a quick, painless process.

I replaced one on my cross-country road trip last year, after the stumbling or misfire became more frequent and pronounced. I haven't had another failure since then, and it's not as if there's a shortage of other things to spend money on with this car.
That's what I've been doing. I saw a set of OEM coils on ebay from a low milage 540 for $100
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Old 12-13-2014, 03:47 PM
cn90 cn90 is offline
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Location: Omaha NE
 
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Posts: 13,203
Mein Auto: 1998 528i 5-sp 140K+
I have some BMWs and Volvos, so this is what I do. I buy used OEM ignition coils for cheap (about $10/each). Buy in bulk, such as lot of 3 or 4 on ebay.
Keep them in your garage and replace as you go along. This is the most economical way to handle these expensive items, which may last 2 years or 20 years.
The coils in my 1998 528i with 150K are still stock.

On long trips, bring some ignition coils in the trunk.
Ignition coils are so easy to replace so "don't sweat the small stuff".

So far so good.

PS: Remove the cosmetic cover (2 plastic caps, and 10-mm bolts) and store it in your garage. This way you have immediate access to the spark plug coils.
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