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  1. Replacement spark plugs for a 2012 skyactiv?

    2010-2013 Mazda 3 & Skyactiv How-To Guides
    What are the best spark plugs for a 2012 skyactiv?
  2. LFJD-18-110-9U spark plugs right ones for a 2008 speed3?

    New Member Introduction & Forum News/Guide
    I just bought these spark plugs listed above and I have a 08 speed 3 with a Mazda 2.3 07-13 turbo eng(27 mm turbo). I also have two CEL of PCM P0442 and IC U2064. Anyone know about spark plugs that are healthy for this motor and also anyone that knows anything about these codes? Thanks
  3. Spark Plugs After 60k Miles

    2014-2018 Mazda 3 Skyactiv Engine and Performance
    Here's a pic of all 4 spark plugs on my '14 2.0L Mazda3. Looks a bit worn, obviously, but there was no performance drop or any other indicator that led me to change these. I simply had the extra money and wanted to stay on top of maintenance. I replaced them with the suggested Laser Iridium NGK...
  4. 2014 3 Spark plugs

    2014-2018 Mazda 3 Skyactiv Engine and Performance
    Need to do my 100,000 service which is only spark plugs. Man is this car cheap to maintain.... So i would normally just go with OEM but there may be better spark plugs out there. Not too sure if it makes a difference anymore like it used to. Dealer wants $40 for each which is a rip off but...
  5. I think my car came with the wrong plugs?

    2004-2009 Mazda3 Discussion
    We recently bought a 2006 Mazda3 hatch (2.3L) with 186k miles. It idles a little rough but overall runs well but I am going through various maintenance tasks since I am not sure exactly what has been done in the past other than what is on the Carfax. Today is replacing the spark plugs. I went to...
  6. should I check for carbon deposits before changing spark plugs?

    2014-2018 Mazda 3 Skyactiv Engine and Performance
    So it's that time for new spark plugs. It's actually 3k miles past the recommended interval (75k). My main concern is carbon deposits on the intake valves. After searching, I've learned that the best way to know you have carbon deposits is to take off the intake manifold and the best way to...
  7. How do these plugs look?

    2014-2018 Mazda 3 Skyactiv Engine and Performance
    So my 2014 Mazda3 has 37,450 miles currently on it. I finally took a look at the spark plugs. They seem a bit black and smell like melted crayons (fouled?). I took these out while the engine was still pretty hot. How do these look to you guys?
  8. 2013 Mazda 3 Spark plugs

    New Member Introduction & Forum News/Guide
    Hello, I went to change the spark plugs on my 2013 Mazda 3 sky active. However, all the sparks i bought didn't fit. I went to my local Mazda dealer and they said the Sky Active motor requires a high heat spark plug that can only be bought at the dealership. They cost approx $41 per plug. Has...
  9. Cracked Paint Around Side Sill Plugs + Mystery Pegs In Rear Doors

    2014-2018 Mazda 3 Skyactiv Discussion
    Hi everyone, I just picked up a 2016 3, and have noticed that a few of the plastic plugs in the underside of the side sill/rocker panels have already started to show paint cracking around them (since Mazda install the plugs before they paint the car). I can only assume the cracking of the...
  10. HKS spark plugs

    2010-2013 Mazda 3 Engine and Performance
    Anybody here tried it yet on their SKYACTIV engine?
  11. How to change your spark plugs 2010-2013 Mazda 3

    2010-2013 Mazda 3 & Skyactiv How-To Guides
    Very simple to do. Requires a few tools: 1) 8mm wrench 2) 15mm wrench 3) 1/4 in ratchet 4) 5/8in spark plug socket with 6in extension 4 beautiful new spark plugs. I posted a video of how to do it here: https://www.youtube.com/watch?v=GCcWZrsevGc It is very simple. 1) Remove engine cover 2)...
  12. Spark plugs?

    New Member Introduction & Forum News/Guide
    I have a new 2016 Mazda 3. I put in a Kn air intake and got a noticeable difference in sound and a little more pickup as well. i Also had a magna flow exhaust system put on. I've heard mixed reviews about performance spark plugs and am wondering if it will help my car in any way whether it be...
  13. Denso Iridium TT Spark Plugs

    2010-2013 Mazda 3 & Skyactiv Discussion
    I know it's probably too soon for changing spark plugs, but I am anal about better performance, economy, etc. Has anyone tried Denso Iridium TT Spark Plugs in a SkyActive engine? RockAuto has them for my Mazda3 SkyActive (VIN engine code 7), but wondered if they would make much of a difference...
  14. 2012 Mazda3i SkyActiv Spark plugs

    2010-2013 Mazda 3 Engine and Performance
    Good day to all, joined the forum since there seems to be a lot of knowledgable people here that could help me out with my "new" 2012 Mazda3i SkyActiv. I got it three weeks ago, and found that the car for some reason was simply not economical. It was doing 22 mpg, with conservative driving, in...
  15. Gas Mileage Drop After New Spark Plugs

    2010-2013 Mazda 3 Engine and Performance
    I have a 2010 Mazda 3i. I replaced the spark plugs with NGK Iridum 4344's at around 88k miles (a little late, I know). These plugs come standard with a .043" gap but the manual suggested a range of .049" - .053" so I gapped them to .051". After installing the spark plugs, my gas mileage...
  16. Spark plugs

    2014-2018 Mazda 3 Skyactiv Engine and Performance
    So, anyone have a clue of what fits. Apparently Mazda OEM runs around 38 per plug which I'll gladly jump to brisk long before I pay that kind of money for plugs. :shocked013:
  17. 09 Mazda 3 BL Head Unit Plugs...

    2010-2013 Mazda 3 & Skyactiv Audio & Electronics
    Hi All !! I have just pulled out the factory touch screen head unit from my Jap import Mazda 3/Axela to replace it with the more traditional unit and I have come across a couple of plugs that the new/common factory head unit doesnt have, and that I cant seem to find any info on. The touch...
  18. Best spark plugs

    2010-2013 Mazda 3 Engine and Performance
    Hello Mazda world. My 3 is at about 38000 and have not changed the spark plugs yet. Not sure when I should either. I have the CS SRI and the CS exhaust with raepipe. Those are the only mods to the engine. First question is when should you change the plugs? Second question is what are the best...
  19. Magnetic oil drain plugs?

    2014-2018 Mazda 3 Skyactiv Engine and Performance
    Hey guys, I'm looking around the internet to see if anyone sells a magnetic oil drain plug for the 2014 2.0L Skyactiv motor. Anyone can chime in on this? Thanks! Edit: Actually, I just thought of this; would a magnetic drain plug also attract potentially magnetic oil additives like...
  20. 2010 5AT 50K Mile service - Which trans fluid and spark plugs!?

    2010-2013 Mazda 3 Engine and Performance
    Im doing a service on my 2.0 5AT Mazda3 soon since I have stopped bringing it to shops for servicing and I want to have good records on when everything was last done. I plan to do: Automatic Transmission Fluid Drain & Fill - Mazda M5 ATF Oil change - Pennzoil Platinum 5w20 Oil filter - M1-102...