2016~2023 CX-9 Common Repairs Thread

[Fruitwolf]

Here’s a chance to share your repair misery.
Any 2016+ CX-9 owners have a significant repair? This should’t include common TSB items (such as faulty infotainment screens) or the dreaded cylinder head crack.

- Water pump replaced 65k
- Brake booster replaced at 117k.

Just curious to see if there are certain common repairs to these vehicles. Thanks in advance.

 

[sm1ke]

2018 CX-9:
Rear diff replacement at about 110k kms (~68k mi)
Front passenger side LCA and both front struts replaced at around 120k kms (~74.5k mi) - this was due to hitting potholes with 285/35/22 tires while being lowered on CorkSport springs.
Upcoming thermostat and ECT replacement at about 139k kms (~86.3k mi)

 

[hw4ng3r]

2022 CX-9
Oil control valve (small leak) replaced at about 45k kms. I think this is a common issue on these motors?

 

[sm1ke]

2022 CX-9
Oil control valve (small leak) replaced at about 45k kms. I think this is a common issue on these motors?

Is that the one at the top of the engine (passenger side, near the firewall, under the engine cover)? I have a small leak there as well, very minor.

 

[hw4ng3r]

Is that the one at the top of the engine (passenger side, near the firewall, under the engine cover)? I have a small leak there as well, very minor.

Yes.

They replaced the entire OCV and the plastic engine cover (didn't feel like cleaning it?).

Was never enough to see any changes (significant an otherwise) to the oil levels between change intervals, but just visual (I, like probably many others on the forums, actually look inside the engine bay every so often).

 

[roundle1979]

Navigation screen has internal cracking. May be a DIY given dealer quotes.

 

[DustyB]

Here’s a chance to share your repair misery.
Any 2016+ CX-9 owners have a significant repair? This should’t include common TSB items (such as faulty infotainment screens) or the dreaded cylinder head crack.

- Water pump replaced 65k
- Brake booster replaced at 117k.

Just curious to see if there are certain common repairs to these vehicles. Thanks in advance.

2018 cx 9 gt. Just replaced rear diff @ 157KM. $4800 cnd. Dealership advisor also quoted some crazy prices for brake jobs. $850 cnd for rear brakes. Picked up and installed Akebono ProActs for $112 cnd. Quoted fronts as well stating they were worn. Inspected myself and they are likely not even 50% worn. $750 cnd for fronts. These prices didn't include brake fluid flush. Also tell me both front control arms need replacement. $1750 cnd. I'll be getting a second opinion in the spring. It drives and rides nice with no squeaks so I'll get them looked at in spring.

 

[BoomerZoomr]

@sm1ke
@DustyB
Was the rear differential replacement just due to excessive wear? And was the oil ever changed, to your knowledge?
Asking because that seems like a premature failure.

 

[MichalP]

Yes.

They replaced the entire OCV and the plastic engine cover (didn't feel like cleaning it?).

Was never enough to see any changes (significant an otherwise) to the oil levels between change intervals, but just visual (I, like probably many others on the forums, actually look inside the engine bay every so often).

I am debating if I should go to the dealer with this leak. It's not even a leak, more like seeping. The area around the sensor looks a little moist. I have this on my cx5 and this car is already 10 years old and now on my cx9. I would usually give it a good wipe every other year and be done with it.

I have read that even despite the repair the leak tends to reappear. Did you notice anything after the repair?

 

[sm1ke]

@sm1ke
@DustyB
Was the rear differential replacement just due to excessive wear? And was the oil ever changed, to your knowledge?
Asking because that seems like a premature failure.

In my case, I think it was due to either a manufacturing defect or an underfilled diff from the factory. The oil had not been changed until I did it at 113k(ish) kms, and by then it was too late. No idea if changing the oil when I had planned to at 90k would have made any difference. IMO it definitely was not due to excessive wear as I had never towed anything, and didn't push the AWD system especially hard, like going uphill on an icy road, or pushing the car hard enough to get the AWD warning light to come on. It was absolutely a premature failure.

With my current car (2022 CX-9), I'm planning to change the diff oil at ~75k km intervals.

 

[BoomerZoomr]

In my case, I think it was due to either a manufacturing defect or an underfilled diff from the factory. The oil had not been changed until I did it at 113k(ish) kms, and by then it was too late. No idea if changing the oil when I had planned to at 90k would have made any difference. IMO it definitely was not due to excessive wear as I had never towed anything, and didn't push the AWD system especially hard, like going uphill on an icy road, or pushing the car hard enough to get the AWD warning light to come on. It was absolutely a premature failure.

With my current car (2022 CX-9), I'm planning to change the diff oil at ~75k km intervals.

You would think that every time you had the engine oil changed, that they would have checked all the vehicles fluid levels. That’s how it was done a generation ago… not sure what they do today.

 

[sm1ke]

You would think that every time you had the engine oil changed, that they would have checked all the vehicles fluid levels. That’s how it was done a generation ago… not sure what they do today.

It's funny because after I had the diff replaced, I asked the dealership how often I should be changing the diff fluid to prevent this from happening again. They told me that when they do oil changes, they "check the fluid" by opening the fill bolt and sticking a finger in. Based on that, they'll know what the fluid level is and whether to change the fluid or not. I am very skeptical that any of their techs actually do this for any of the cars they service.

 

[Silly Wabbit]

It's funny because after I had the diff replaced, I asked the dealership how often I should be changing the diff fluid to prevent this from happening again. They told me that when they do oil changes, they "check the fluid" by opening the fill bolt and sticking a finger in. Based on that, they'll know what the fluid level is and whether to change the fluid or not. I am very skeptical that any of their techs actually do this for any of the cars they service.

I too am extremely skeptical if they even bother to check at all. Even then, they can't tell the oil quality with such a small sample

 

[DustyB]

@sm1ke
@DustyB
Was the rear differential replacement just due to excessive wear? And was the oil ever changed, to your knowledge?
Asking because that seems like a premature failure.

Bearing wear. Fluid changed at 130Km