Essential/Non-essential servicing for 2017 CX-9 108k km

[megaman123]

Hey all.

I got this 2.5 years ago used from a dealership with 56k kms on it and I'm up to 108k now. I've kept up to do date with the oil changes. I also replace the cabin air filters every year. I got a new battery 1.5 years ago. Two years ago I got the cracked cylinder head replaced. Just got back from dealer to do the tire swap and had the stabilizer links replaced in the front as they were apparently broken. I could hear clunking for a while. Brake pad levels are still fine.

Anyway, I'm looking at Schedule 2 for Canada here: https://www.mazda.ca/en/digital-owners-manual/2017/cx-9/contents/07020300.html. I see that it says to replace spark plugs at 64k kms. I haven't done that.

On the invoice today it mentions the below recommendations or deferred maintenance. I'm wondering if any of you do these or the spark plugs as mentioned above.

16MAZZALIGN 4 WHEEL ALIGNMENT
PERFORM 4 WHEEL ALIGNMENT. ROAD TESTED TO VERIFY STEERING WHEEL ANGLE,
ALIGNMENT MEASURING HEADS WERE ATTACHED TO EACH WHEEL/RIM ASSEMBLY AND
COMPUTER LASER READER TAKES MEASUREMENTS OF ALL WHEELS AND CALCULATES
ADJUSTMENTS REQUIRED TO RE-ALIGN ALL 4 WHEELS. $159.95 + TAX

16MAZZBRAKEFLUS BRAKE FLUID SERVICE
PERFORM BRAKE FLUID SERVICE - RECOMMENDED EVERY 2 YEARS OR 40,000 KM $169.95 +
TAX

16MAZZDIFF DIFFERENTIAL SERVICE
PERFORM DIFFERENTIAL SERVICE (48,000KM INTERVALS) WITH FULL SYNTHETIC FLUID AS
PER MAZDA SPECIFICATIONS $209.95 + TAX

16MAZZSKYTRAN SKY TRANS SERVICE
SKYACTIVE TRANSMISSION SERVICE $347.95 + TAX

16MAZZTHROTTLE THROTTLE & INTAKE
THROTTLE BODY AND COMBUSTION CHAMBER CLEANING ADDITIONAL PROTECTION WITH AIR
INTAKE CLEANING AND DECARB SERVICE ON ENGINE VALVES $169.95 + TAX

16MAZZTRANSCASE TRANSFER CASE FLUID
TRANSFER CASE FLUID CHANGE $209.95 + TAX

22MAZZ19 DRIVE BELT(S)
cracked & worn, recommend replacing - $ (I had an independent mechanic look at this a few months ago and he said it was fine. Dealer specifically told me during my last tire swap or oil change or whatever that I should replace it. This time for current tire swap they didn't say anything)

30MAZZFUELINJEC MAJOR FUEL/INJECTION
MAJOR FUEL AND INJECTOR CLEANING SERVICE, RECOMMENDED EVERY 56,000KM'S OR
EVERY 2 1/2 YEARS. $169.95 + TAX

 

[Lazy2.5]

The only thing you actually need is a transmission fluid/ strainer (filter) service. The dealer likely will not do that. go to a transmission shop.

You're due soon for new spark plugs.

The throttle body cleaning wouldn't hurt.

You can run a fuel system cleaner through your tank.

Don't go to the dealer.

 

[sm1ke]

Definitely no need to go to the dealer. Consider an independent mechanic from now on, rates and costs may be cheaper. Get OEM parts and fluids (use OEM fluids for transmission and differential services) from the dealer for sure. Change your spark plugs as soon as you can and follow the change interval going forward.

I would skip the throttle and intake cleaning and the fuel injection cleaning - those can be done at home with over-the-counter products from places like Canadian Tire or NAPA Auto Parts. Follow your independent mechanic's recommendations for drive belts. Alignment may be a good idea if they had to work on suspension.

Everything else is good to do at the intervals they recommend, but I would get quotes to have them done at an independent or DIY. Speak to your mechanic to find out what they would charge for those services if you provided the parts/fluids, then contact the dealer for part/fluid prices. The difference (or lack thereof) in prices between dealer and independent should help you decide where to go.

 

[megaman123]

Thanks guys. I have inquired about the spark plugs. The mechanic I've been using the past couple years for my Accord said something like $120 CAD maybe more when I told him about my 2017 CX-9. It sounded to me like that was the all in price plus tax but I can't be sure. He told me he's booked up for the next three weeks.

Got a quote from the dealer and I think it was like $450.

Just talked to another mechanic to get a quote and he said the plugs are almost $60 a piece from the dealer and he would only put in OEM. His labour would be $140. He said $380 with tax on top. This guy said he could do tomorrow.

And just called another and he said he'd put in NGK laser iridium and could do a couple days from now. $210 for the plugs and labour and then tax on top.

Spoke to another and he said $290 plus tax. They use NGK double platinum.

It is recommended to use OEM or is something like the NGK fine?

 

[sm1ke]

NGK 90288 (DILKAR7M8) - Laser Iridium High Ignitability; Pre-Set Gap: 0.030"

I've been using the above plugs for my 2018. I'm currently on my second set of NGKs - car has 132k kms on it now. I change them every 60k kms. They're currently $19 each on RockAuto.com, shipping and taxes will vary depending on province. These plugs are great, and more reasonably priced than the OEM Mazda ones. I've never had any issues with them. I've also replaced them myself, but any reputable independent shop can replace them for you if you supply the plugs.

 

[Lazy2.5]

NGK is OEM.

Those are all ridiculous prices. You can get good spark plugs for $10 each. installation is very easy.

 

[sm1ke]

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@megaman123, I would caution against using cheap plugs based on the above, but if you really wanted to save money, at least use these plugs: PY8V-18-110-MV. These are Mazda branded, "Value Line" spark plugs, made in Mexico. Here are a couple of links:

https://www.mazdapartsconnect.com/oem-parts/mazda-vpm-spark-plug-turbo-py8v18110mv

https://www.mazdaswag.com/oem-parts/mazda-vpm-spark-plug-turbo-py8v18110mv

Here's a link to the Reddit comment regarding these plugs from less than 2 weeks ago.

Here's an alternative if you don't like NGK for whatever reason. Denso 3523. Same price as the NGKs and they should work fine, though I'm not sure if anyone here with a 2.5T has used them yet.

 

[megaman123]

Appreciate the feedback. I'm pretty busy for the next several days and then next weekend going out of town for Easter. So I'll be putting several hundred kms on my vehicle that already has 108k on it. Wondering if it's an urgent thing or if I can wait.

I see that if I order the NGK laser iridium from Rockauto (under $100 CAD total) today I can get them 2-3 business days later with the quicker option being only a few bucks. And I can provide them to a mechanic even if I don't DIY. Anyway, I was contemplating doing it myself between 10-14 days from now but wondering what's involved. I will be out for a few hours before I come home and can research further but did you have to order a special kit for doing your own spark plugs? I have a socket set but it's not the most comprehensive. I can certainly youtube it.

I also have a 2009 Accord with 200k on it that I got used in 2018 where I haven't done it, though we haven't put a tremendous amount of mileage on it. Don't know if previous guy did but I'd assume no.

Also, I was one of the guys who had a cracked cylinder head repaired. Still hoping that we in Canada get the same relief the US guys got on being compensated for it. I have been keeping all my receipts for all work done as usual. But for services where the dealer is not much more than a mechanic, I take it to the dealer in case the dealer needs to go to bat in my case to try to get something out of Mazda Canada for a claim. Following that logic, I keep receipts from professional mechanics to show proof in case the dealer wants to present that to Mazda Canada on my behalf as well.

 

[megaman123]

Okay, so haven't watched a tutorial yet but was looking over the engine bay with a neighbour who has done his plugs in his 2013 Sonata. He has the deep socket tool and the gap tool. I think I'll just order the plugs now and try and tackle this mid week before I leave for the long weekend.

And if I'm not able to get around to it, it sounds like this can wait for a little while and I can do it the following week.

 

[sm1ke]

I think that aside from a basic ratchet/socket set, all you really need is a good 14mm spark plug socket, one that is magnetic or has retaining clips to hold the socket. I personally avoid the ones with rubber grommets/inserts because I had a bad experience with one (the insert fell out of the socket and into the spark plug hole).

A torque wrench is really nice to have to make sure you torque the plugs to spec (12-15 lb-ft, or 144-180 in-lb). Since my only other torque wrench is a 1/2 in drive and it's lowest torque setting is 50 lb-ft, I used a 1/4 in torque wrench with a 3/8 in adapter for the spark plug socket and it worked great.

Here's a link to the vid I used when I did mine.

 

[sm1ke]

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@megaman123, I would caution against using cheap plugs based on the above, but if you really wanted to save money, at least use these plugs: PY8V-18-110-MV. These are Mazda branded, "Value Line" spark plugs, made in Mexico. Here are a couple of links:

https://www.mazdapartsconnect.com/oem-parts/mazda-vpm-spark-plug-turbo-py8v18110mv

https://www.mazdaswag.com/oem-parts/mazda-vpm-spark-plug-turbo-py8v18110mv

Here's a link to the Reddit comment regarding these plugs from less than 2 weeks ago.

Here's an alternative if you don't like NGK for whatever reason. Denso 3523. Same price as the NGKs and they should work fine, though I'm not sure if anyone here with a 2.5T has used them yet.

Just adding another potential low-cost spark plug option. Autolite XP5682 installed by another user here in January. Reporting 21 mpg in mostly city driving.

Thread 'Spark plug replacement on 2020 CX-9'

Jan 14, 2025

I did a spark plug replacement on my 2020 CX 9 with 53K miles. Here's a picture of the plugs. Not fouled, but was surprised at how beat-up they looked. I used an aftermarket plug, Autolite XP5682. $27 for four of them on Amazon. Car runs like a top.

Get some dielectric grease and put on the sparkplug boot before you reinstall. Had best luck, wiggling back and forth while pushing down on it. Takes a little finesse to get them to click back down onto the plug end.

• Veroguy
• Replies: 7
• Forum: CX-9 Powertrain

Note: Autolite does not list the CX-9 or any model with the 2.5T engine as an applicable option for these spark plugs on their product page. They appear to be direct replacements for the non-turbo 2.5L and 2.0L engines.

 

[megaman123]

Well I got the spark plugs with the intention of DIYing it but I just don't have time. I got a dozen other things to take care of at the moment. So I had booked an appointment with the mechanic and he said one of the plugs is seized. Don't know if it's the first one he tried or another but he said he doesn't want to risk overpowering it and breaking it. He said to make another appointment to drop it off in the morning in a couple of weeks for when he's not so busy so he can spray some penetrating oil on it and let it sit for a few hours. He also said it's not all that necessary. Like a if it ain't broke don't fix it.