Spark Plugs & AC Filters - BMW Forum

rashid · 06-02-2009, 01:09 AM

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?

warrior spirit · 06-30-2009, 05:19 PM

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

rashid · 07-01-2009, 12:15 AM

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?

warrior spirit · 07-08-2009, 04:33 PM

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

BimmerE39 · 07-08-2009, 10:05 PM

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.

rashid · 07-08-2009, 11:30 PM

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

BimmerE39 · 07-08-2009, 11:44 PM

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.

rashid · 07-08-2009, 11:57 PM

Many thanks ... what was the approx. price ?

BimmerE39 · 07-09-2009, 12:26 AM

I bought 6 NGK plugs for $60. They were a little pricey but I heard good things so I paid the premium for them.

rashid · 07-09-2009, 01:18 AM

So far I only found NGK platinum ...

BimmerE39 · 07-09-2009, 02:00 PM

Those will probably be fine as well.

rashid · 07-09-2009, 02:15 PM

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.

BimmerE39 · 07-09-2009, 02:19 PM

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

rashid · 07-10-2009, 09:46 AM

Many thanks, I shall go for NGK then.

BimmerE39 · 07-10-2009, 10:22 AM

Your welcome. I've liked them a lot since I put them in last year.