[NorthernCAE90]

Hello all im at 57,xxx miles and gonna do the spark plugs on 06 325i. So i know they say 100k but i think 60,000 miles is the maximum for plugs in my mind so im gonna change them out now. I was wondering what the consensus was here on the most popular used plug for the 325 (unless its all the same for all e90's). Also Do you guys change out the Coils at the same time of spark plug swap or no? I didnt think i should but i remember seeing a post along time ago some one was telling another person that they should of changed out there coils at the same time with there plugs, thats why there coils failed.


All Advice & Information is greatly appreciated!!

Thanks all

[hockeyplayer]

I believe OEM plugs will cost you about $60 at any Autozone, etc.

Just my opinion but no need to change out a coil unless it is bad.

[floydarogers]

Originally Posted by hockeyplayer

I believe OEM plugs will cost you about $60 at any Autozone, etc.

Just my opinion but no need to change out a coil unless it is bad.

++

non-oem has been known to cause problems.
You need a special thin-walled plug socket IIRC. Pay attention to torque requirements.

All this has been gone over many times, search for them.

[Meeni]

No need to change the coils if they run strong. And the plugs could stay a lot longer (changed mine at 80k, looked like new, I think the 100k interval is actually conservative already).

You do not need the thin wall socket on a 325. Do not grease the thread. Torque to spec., not more.

[Efthreeoh]

The above two posts are good advice. I've changed my plugs at 99,000 and again at 195,000 miles. I used OE plugs both times that I purchased on line at getbmwparts.com (Tischer). IMO there is absolutely no need to change the plugs early on the N52. A standard Craftsman plug socket works fine. Torque using a beam-type torque wrench.

No need for coils unless one fails. I'm on my original coils at 240,000; I think the '06 cars had good coils. To play it safe you should by a few extra coil lock-down clamps (the device on coil that locks it into place and is also used to pull the coil off the plug). They can break if you apply force to them incorrectly. They are Item No. 2 in the drawing below, P/N 12131437986. They are inexpensive and cheap insurance in case one breaks while you are working on the plugs. If one does break the coil will work fine, but you'll have to go in and replace it later, which means pulling all the crap off again to get to the coil. I have 3 spares.

Good luck with the DIY.

[NorthernCAE90]

Yeah ive done alot of research sorry about this, but it so damn confusing with these 4 different spark plug Part Numbers popping up and not sure whats better than what. lol Thanks all for the advice and what not, i believe im going to just go with the original plugs (iridium) that came with the 325i, since i guess that's what people are using now (not the platinum's).

[Efthreeoh]

Originally Posted by NorthernCAE90

Yeah ive done alot of research sorry about this, but it so damn confusing with these 4 different spark plug Part Numbers popping up and not sure whats better than what. lol Thanks all for the advice and what not, i believe im going to just go with the original plugs (iridium) that came with the 325i, since i guess that's what people are using now (not the platinum's).

Looking at the info I posted, BMW has only two part numbers for plugs for the N52; two of the P/N are obsoleted. One is a NGK plug and the other is a Bosch. Either plug will do fine. However, I still think you are changing your plugs about 40,000 miles too early. Honestly, the N52 only needs plugs every 100,000 miles. I'd save the money and effort for when the water pump goes.

[BashShah]

eBay seller: Germanautosupply
Also when putting plugs in; DO NOT put any Type of Anti-Seize on them. Even Coper type.
This adds to the torque required.

DN

[NorthernCAE90]

Originally Posted by Efthreeoh

Looking at the info I posted, BMW has only two part numbers for plugs for the N52; two of the P/N are obsoleted. One is a NGK plug and the other is a Bosch. Either plug will do fine. However, I still think you are changing your plugs about 40,000 miles too early. Honestly, the N52 only needs plugs every 100,000 miles. I'd save the money and effort for when the water pump goes.

Yes your correct about the two other part Numbers being ended, BUT there is big debate here on the forum and others about whether the newer Platinum NGK are better than the Iridium. And from what the latest info says is that the older plug( original that came with the 06) the Iridium( one of the ended part #'s) is actually better than the platinum.

Every single person i seen who posted a pic of there plugs on here that changed it "early" (right around my mileage) the plugs were roasted. Especially with these motors "normal" oil consumption the plugs were just gone.