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5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)

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Old 06-02-2009, 01:09 AM   #1 (permalink)
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Spark Plugs & AC Filters

I have my spark plugs & AC filters changed (on my E39-530, 2002) as detailed below:

Spark plugs ---- changed before 2 years / 50,000 KM
AC filters ----- changed before 3 years / 100,000 KM (minimum) but cleaning from time to time (every 20,000 KM)

Is that right? what are your advices?
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Old 06-30-2009, 05:19 PM   #2 (permalink)
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how r u Rashid

i think its better to change sparks at 20K KM if they are of good brand
i used on my E39 520 2003 Bosch platinum

and AC filters its about thier shape and how clean r they
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Old 07-01-2009, 12:15 AM   #3 (permalink)
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Thanks for the feedback.

My car is now approaching 350,000 KM & I need to reduce my spendings on it unless it is mandatory ... The AC is cooling well & the engine start is also ok ... Do I still need to change them?
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Old 07-08-2009, 04:33 PM   #4 (permalink)
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i think its better to change them to keep your BM healthy and dont wait sparks and filter death
and i think they r not expensive to change
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Old 07-08-2009, 10:05 PM   #5 (permalink)
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I would change them personally. I upgraded to NGK Iridiums last year and they made a huge difference. When you remove your plugs I would check to see if they have any buildup on them. If not, your engine is running well.

Cabin air filters are less important, but I change them whenever they start to get nasty looking. I don't use the air that much as I prefer to roll down the windows.
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Old 07-08-2009, 11:30 PM   #6 (permalink)
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NGK Iridiums ... not sure if I can find them here, but before I search, I want to know what different expected, comparing to stock plugs .. thanks in advance
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Old 07-08-2009, 11:44 PM   #7 (permalink)
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I can't really explain the before and after. To me, the car on startup was much better and my fuel mileage went up. My other plugs were pretty shot though so new plugs regardless would have made a difference. The Bosch Platinum +4's are also pretty darn good too.
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Old 07-08-2009, 11:57 PM   #8 (permalink)
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Many thanks ... what was the approx. price ?
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Old 07-09-2009, 12:26 AM   #9 (permalink)
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I bought 6 NGK plugs for $60. They were a little pricey but I heard good things so I paid the premium for them.
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Old 07-09-2009, 01:18 AM   #10 (permalink)
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So far I only found NGK platinum ...
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Old 07-09-2009, 02:00 PM   #11 (permalink)
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Those will probably be fine as well.
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Old 07-09-2009, 02:15 PM   #12 (permalink)
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found an other option, pulstar with price 3 times more than NGK & I am thinking seriously to try them unless someonew had bad experience with them. I shall wait for two days after this post & if no negative feedback received then I will buy them & will keep you updated on the performance .. thanks for your help again.
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Old 07-09-2009, 02:19 PM   #13 (permalink)
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I've not heard good things about Pulstar plugs...read this thread in Corvette Forums and look at post #3. It pretty much sums up why I won't use them.

Click Here To Read Thread
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Old 07-10-2009, 09:46 AM   #14 (permalink)
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Many thanks, I shall go for NGK then.
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Old 07-10-2009, 10:22 AM   #15 (permalink)
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Your welcome. I've liked them a lot since I put them in last year.
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