2018 Mazda CX-9 Other or unknown Problems
- Complaints
- 20about this part
- Share
- 16%of 128 total for the year
- Median mileage
- 13,058miles
- Trend
- StableComplaints filed in the last 3 full calendar years are within 25% of the 3 years before.
NHTSA recorded 20 complaints about the other or unknown of the 2018 Mazda CX-9, 16% of the 128 complaints for this model year. Where a mileage was given, the median is 13,058 miles. 1 of these say a crash was involved, according to the filers.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“Happened to me two times in past three weeks, where I am coming to a stop, or hardly moving, and car suddenly accelerates. Had my foot on the brake and the car was still trying to accelerate. Yesterday, 4/24/21 it took all my strength on the brake to keep the car from pulling into oncoming traffic. I have been driving for 39 years and have owned many cars, and something like this never happened to me. I will be bring the car dealership tomorrow, the car has only 10k miles on it as we don't do a lot of driving with it as we owe two cars. …”
NHTSA complaint #11413732, filed 2021-04, 10,300 miles“On friday (june 29th, 2018) around 9:29 pm, my car broke down while my family and I were traveling from rochester ny to boston massachusetts. I was driving down the massachusetts turnpike when all of a sudden my check engine light turned on and my car just started to slow down in the middle of the highway. I was able to pull over in time and called Mazda roadside assistance because after the car stopped, it wouldn't turn back on. Since we were on a restricted highway, my car had to be towed and we were taken to a safer location. …”
NHTSA complaint #11111474, filed 2018-07, 15,816 miles“I purchased a new Mazda CX-9 in sept 2017 because it had the highly touted smart city braking system for which I paid thousands extra. I had had a previous rear end collision and wanted to be sure this system would at least warn me. I set up some cardboard boxes wrapped in aluminum foil. I slowly (10 MPH) drove the car into them without touching the brake or accelerator. The car did not slow down or warn me.(I tried sending a video to you from my iphone which may not go through) I made an appoint to repair this obvious factory defect and significant safety issue. …”
NHTSA complaint #11053492, filed 2017-12, 946 miles“Car showed ignition on when the car was turned off. Same day while driving on highway car engine revved for no reason. Also when someone got out of parked car it said no key detected but car was still turned on and key was right beside me.”
NHTSA complaint #11233692, filed 2019-07, 18,500 miles“The infotainment screen has spider like frost inside the screen. I've checked and other models have had this same issue and have been recalled and repaired. My model year 2018 is suffering the same issue and MAZDA has lagged on this problem. Please put out a recall on this as it is a hazard when you rely on your navigation system and other components the screen assists with.”
NHTSA complaint #11592673, filed 2024-06Related service bulletins
- 11032104Apr 30, 2026DESCRIPTION Some vehicles may require the replacement of a damaged VIN plate or vehicle certification label. To obtain a replacement VIN plate (bulkhead-mounted and visible…
- 11032103Apr 21, 2026This Service Alert supersedes the previously issued SA listed below: The changes are noted in Red. SA-011/24 02/12/24, 06/06/24, 07/29/24 DESCRIPTION Mazda has developed factory…
- 11028133Jan 26, 2026There are currently 2 methods for cutting a new auxiliary key blank. A. Auxiliary Key Trace Cut Method • B. Auxiliary Key Code Cut Method 2019 and newer models require a 10-digit…
- 11028127Jan 5, 2026Some customers may report an odor or water in the HVAC system and upon inspection, the cabin air filter may be found to be wet.
- 11026904Dec 10, 2025A musty/mildew type odor may come from the vents when the air conditioning (A/C) system is operating. It is most noticeable when the A/C is first turned ON. This odor is the…
- 11023703Sep 30, 2025Some vehicles may have one of the following DTCs stored in memory along with a system status notice on the Multi-information display OR display a system status notice with no…
- 11023702Sep 30, 2025Interior parts made of resin have antistatic coating to prevent dust from sticking on the surfaces, and depending on the conditions of use, the antistatic components may…
- 11022742Aug 22, 2025Some vehicles may experience exterior trim heat damage such (melted, separating, etc.) when parked near a glass building or Low-E windows. This may be caused by the sun's…
- 11022728Aug 15, 2025When replacing the MAZDA CONNECT tuner and amp unit (TAU) with a replacement tuner for any reason, a call must be made to inform SiriusXM of the existing Radio ID and the…
- 11021502Jul 14, 2025CSP13 - CUSTOMER SERVICE PROGRAM - MAZDA CONNECT INFOTAINMENT SYSTEM LIMITED WARRANTY EXTENSION As a result of a Mazda Connect Infotainment Class Action settlement, Mazda Motor…
Other or unknown: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2023 | 6 | 46% |
| 2021 | 6 | 15% |
| 2020 | 3 | 16% |
| 2019 | 14 | 26% |
| 2018 | 20 | 16% |
| 2017 | 9 | 15% |
| 2016 | 6 | 6% |
| 2015 | 9 | 26% |
| 2014 | 9 | 17% |
| 2013 | 9 | 13% |
| 2012 | 6 | 3% |
| 2011 | 6 | 4% |
| 2010 | 7 | 4% |
| 2009 | 2 | 3% |
| 2008 | 13 | 8% |
| 2007 | 6 | 7% |
Other parts of the 2018 Mazda CX-9
76 complaintsElectrical system
15 complaintsTransmission and drivetrain
13 complaintsBrakes
11 complaintsFuel system
7 complaintsForward collision avoidance
4 complaintsBack-over prevention (rear camera)
3 complaintsSteering
3 complaintsVisibility (wipers, defrost, mirrors)
3 complaintsAir bags
2 complaintsEngine cooling
2 complaintsSeats
2 complaints
← All problems reported for the 2018 Mazda CX-9
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 29, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology