2014 Touring FWD - Spark Plug Model Number?
- Thread starter SA Bill
- Start date
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- San Antonio, Texas
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- '15 CX-5 Miata AWD
OEM PE5R18110 NorthPark Mazda will price match other dealer price (I/e zoomzoomnationparts.com). The non OEM plugs don't perform as well you will notice.
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- Denver, CO
Thanks, going to be doing mine soon too. Stupid question: 4 of them right? (scratch)
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- State of Jefferson
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- 2017 CX-5 GT AWD+
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- Plano, Texas, USA
Firstly, Mazda's maintenance schedule says you need spark plug replacement at 75,000 miles. It's a bit too early at 50,000 miles.
Secondly, Mazda OEM PE5R-18-110 spark plug is very expensive, at $32.27 each MSRP! Some people believe NGK's ILKAR7L11 spark plug is exactly the same as Mazda OEM but with much cheaper price ($12? each). Personally I may still insist very expensive OEM plugs based on what the owner's manual says: "This (Mazda Genuine) spark plug provides the SKYACTIV-G engine with optimal performance" and Chris_Top_Her's comment above. And my common sense would also say if NGK plug is truly the same as OEM, why the price difference is so much?
Thirdly, make sure to have s 9/16" spark plug or deep socket for the plugs.
Fourthly, for our SkyActiv-G 2.5L / 2.0L I4, yeah we need 4 spark plugs.
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- San Antonio, Texas
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- '15 CX-5 Miata AWD
1 plug per cylinder so 8 plugs for the v8.
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- San Antonio, Texas
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- '15 CX-5 Miata AWD
Just because the manual says 75k doesn't mean much. Driving habit, fuel quality etc.. you can probably go 100k with no misfires but you're still getting less performance
Or 4 plugs to input into engine and 4 tests plugs mailed to me. I need to test if they came from good manufacturing batches
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- Denver, CO
Spirited driver here. 66k miles. Feel like I want to just go ahead and get it done.
I ordered these OEM Mazda spark plugs for my ride online and they work great!. I had them shipped conveniently to my door too. Here's the page to the OEM spark plugs https://www.mazdapartsprime.com/oem/mazda~pe5r18110~plug-spark.html
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Thx for all the info!
I know it's a little early to change them but I'll probably wait another 2-3,000 miles. I don't mind changing early. I've been doing a lot of 85mph cruising lately so maybe it's time.
I'll go with official OEM plugs because I saw somewhere that OEM plugs provide feedback to the system that non OEM plugs do not...leading to performance problems for those who used non OEM plugs.
Bill
I know it's a little early to change them but I'll probably wait another 2-3,000 miles. I don't mind changing early. I've been doing a lot of 85mph cruising lately so maybe it's time.
I'll go with official OEM plugs because I saw somewhere that OEM plugs provide feedback to the system that non OEM plugs do not...leading to performance problems for those who used non OEM plugs.
Bill
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- Plano, Texas, USA
No, swivel joint socket is not needed, but a 9/16” spark-plug deep socket with a rubber grabber inside is more convenient to grab the plug out and put the new plug back in.
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Spark plug replacement
I went ahead and replaced them on our 2014 Grand Touring AWD after almost 5 years and 60k miles. I know the manual says 75k miles but I figure it was time given the high compression ratio SkyActiv engines and the lots of stop and go seen by this car (my spouse's hour long city commute).
I got the Mazda OEM plugs (PE5R-18-110) despite their high cost, given the experience of others on this forum. $25.82 each! https://www.shopmazdaparts.com/oem-parts/mazda-spark-plug-each-this-is-one-spark-plug-pe5r18110
You'll definitely need a 9/16" spark plug socket - the one size I did not have. I got a nice magnetic one with a swivel joint (GearWrench 3938) but it was too shallow for the Mazda plugs; I tapped in the magnet a bit and made it work (see my comment on Amazon). The plugs are pretty deep in the engine block so make sure you also have an extension for your wrench.
Very straightforward job: remove the cover, remove the bolts holding the ignition coils, unplug connector for each coil, and remove and replace plugs. Here is a pic of the old plugs. The electrodes looked in good condition with only some carbon on them. I expected some oil on the threads (no big deal) but the ceramic insulators had a bit too much crud (oil?). You can see where the rubber boot of the ignition coil fits on the ceramic insulator:
After seeing them I'm glad I replaced them.
I went ahead and replaced them on our 2014 Grand Touring AWD after almost 5 years and 60k miles. I know the manual says 75k miles but I figure it was time given the high compression ratio SkyActiv engines and the lots of stop and go seen by this car (my spouse's hour long city commute).
I got the Mazda OEM plugs (PE5R-18-110) despite their high cost, given the experience of others on this forum. $25.82 each! https://www.shopmazdaparts.com/oem-parts/mazda-spark-plug-each-this-is-one-spark-plug-pe5r18110
You'll definitely need a 9/16" spark plug socket - the one size I did not have. I got a nice magnetic one with a swivel joint (GearWrench 3938) but it was too shallow for the Mazda plugs; I tapped in the magnet a bit and made it work (see my comment on Amazon). The plugs are pretty deep in the engine block so make sure you also have an extension for your wrench.
Very straightforward job: remove the cover, remove the bolts holding the ignition coils, unplug connector for each coil, and remove and replace plugs. Here is a pic of the old plugs. The electrodes looked in good condition with only some carbon on them. I expected some oil on the threads (no big deal) but the ceramic insulators had a bit too much crud (oil?). You can see where the rubber boot of the ignition coil fits on the ceramic insulator:
After seeing them I'm glad I replaced them.
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- Denver, CO
Well I'm at 67k miles on my 2014. Guess I should go ahead and replace mine too.
