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      03-29-2013, 05:14 PM   #1
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Thumbs up Spark Plug Change

Just changed my plugs at 46k miles. They didn't look too bad, but the car definitely runs smoother now, and maybe slightly stronger. Definitely a nice compliment to my recently installed bpm stage 2 tune. I ordered my plugs from amazon for about $10 each with free shipping.

For anyone thats looking at doing this, its not too difficult if you have a variety of ratchet extensions and adapters. The front 6 are fairly easy, about 10 mins each, the rear two were a b*tch, took me about 45 mins each, so about 2 1/2 hours total. I basically just removed the two 10mm bolts that hold the coolant reservoir and moved it put of the way, then Popped off the black plastic cover over the valve cover. One at a time, I removed the coil harness, used a wire hanger to pull the coil off, then removed the plug with a 5/8 plug socket. If your socket doesn't have a rubber grommet to grab the plug, you will need a magnet to fish it out. I used a magnetic drill bit socket. For the rear two coils, it helps to use a long screwdriver to pry up the coil as well as the hanger since you can't pull on it straight up due to the firewall. For the driver side you just need to remove the airbox to gain access, two 10mm bolts and a 6mm screw on the air hose clamp.

Feel free to shoot me any questions...
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Last edited by M3amigos; 03-29-2013 at 05:35 PM.
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      01-04-2015, 01:58 PM   #2
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Good to hear, thanks for the report
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      01-04-2015, 02:25 PM   #3
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Were the plugs changed before?
2011 e90 M3 Space Grey DCT ZCP- black eAs gills/grilles, eAs H8 LED Corona bulbs, BMW carbon fiber mirror caps, Agency Power CF elbow, MS 12f/12r spacers, Alex@AlpineMSS DCT Flash, iND reflectors, Milltek slip-on, F10 M5 front brakes, BMW Perf. steering wheel
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      01-04-2015, 04:23 PM   #4

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By the way, 4-packs of they correct NGk's are for sale on Amazon right now for $39 each and free shipping, cheapest price I've seen in a while, anything under $10 per plug is pretty good
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      01-09-2015, 06:46 PM   #5
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Debating whether I have patience to do it myself
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      01-09-2015, 07:38 PM   #6
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Originally Posted by Flying Ace View Post
Debating whether I have patience to do it myself
I think it comes down to whether that's your only car or not.

I've done the job and it's not THAT bad, but it took me a couple of days working 30 mins at a time. The first 6 I did in no time, but the last 2 in the back can be a pain to get to, especially if you don't know what combination of tools to use.

If I had to do it again, it would be so much quicker because I'd know exactly what to do. It's really not a bad job to be honest
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