8.0

pretty bad
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
4,900 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2021 Mazda CX-9 engine problems

engine problem

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2021 Mazda CX-9 Owner Comments

problem #10

Feb 102023

CX-9

  • miles

A D V E R T I S E M E N T S

2021 Mazda CX-9 Low Oil Light came on at around 18,900 miles (2/10/2023 and 2/11/2023). Took to Mazda, and they said there was defective valve stem seals that can allow oil to leak into the engine-€™s combustion chamber. Vehicle is currently with Mazda service department to be fixed.

- Fredericksburg, VA, USA

problem #9

Dec 062022

CX-9

  • 49,000 miles
The contact owns a 2021 Mazda CX-9. The contact stated that while driving at 60 MPH or exceeding 60 MPH, the vehicle would lose motive power and stall without warning. The contact stated that he would coast to the side of the road and the vehicle would restart after 2-3 attempts and regain normal functionality. The vehicle had not been diagnosed or repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 49,000.

- San Antonio, TX, USA

problem #8

Nov 162022

CX-9

  • miles
A lot of engine oil consuption, 1 quart per 2500 miles.

- Miami, FL, USA

problem #7

Aug 122022

CX-9 4-cyl

  • miles

A D V E R T I S E M E N T S

My 2021 Mazda CX-9 uses excessive engine oil as reported in the Mazda "M-Tip" bulletin MT-005/20 and this manufacturer's defect is reportedly caused by defective valve stem seals as claimed in the class action lawsuit U.S. District Court for the Central District of California, Southern Division: [XXX] v. Mazda Motor of America, Inc. The valve stem seal problems allegedly cause excessive oil consumption between regular oil change intervals, which increases the risk of engine damage and failure. I believe Mazda must address this issue as soon as possible and repair my affected vehicle before I suffer catastrophic engine failure or long-term engine damage. INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).

- Erie, PA, USA

problem #6

Oct 202022

CX-9

  • miles
1000 miles before first ever oil change was needed (according to window sticker provided by Mazda) the low engine oil light came on. The oil was low and needed to be toped off and brought directly to dealer for oil change. The same thing happened again 1300 miles before second oil change was required. It became obvious that the brand new vehicle was burning oil for some reason. The dealership tried to tell us that it was because the car was a turbo. We weren-€™t buying it and told them we wanted it looked at. After brining it into the dealer they mentioned that Mazda had a bulletin for a valve seal fix that might help it stop burning oil. So they admitted that yes it was burning oil. After googling the bulletin I realized that our vehicle is having the same problems that many others with 2021 Mazdas (certain production period) are having. There is currently no recall however there is proof that these problems are damaging our vehicle, putting my wife and children at risk every time they get in the car and Mazda is doing nothing about it. There is also proof that these gases from the burnt oil are damaging other engine systems further increasing the likelihood of an engine failure. Down the road. Chances are this damage is already done, despite this valve seal repair.

- North Andover, MA, USA

problem #5

Jun 212021

CX-9

  • miles
Massive oil consumption. Uses 1 quart or more of engine oil at around 3,000 miles after oil change. Low oil light comes on...

- Westmont , IL, USA

problem #4

Jul 182022

CX-9

  • miles

A D V E R T I S E M E N T S

The low engine oil light is coming on every 3500 miles. When checking oil level it indeed is low and requires a quart of oil. There is an active TSB out as this is a known issue but no recall issued yet.

- Arena, WI, USA

problem #3

Dec 292021

CX-9

  • miles
New Mazda vehicle engine is consuming approximately 1 quart of oil, approximately every 3,500 miles. No recall for this yet, however Mazda technical service bulletin TSB # 01-012/21 admits this is a common and known issue for this vehicle which may eventually lead to the vehicles engine and parts no longer functioning.

- Holiday, FL, USA

problem #2

Jun 092022

CX-9

  • miles
Every 4,000 miles my engine oil warming light comes. When the dealership checked my oil level, it was about a quart low.

- Bel Air, MD, USA

problem #1

Jun 012022

CX-9

  • miles
I purchased this vehicle June 5 2021. The vehicle has approximately 9150 miles at this time. I changed the oil the first time at 3222 miles just because it was new and I wanted to have a starting point on oil changes. The car has an app you load on your cell phone for messages. The first time I received a massage that the engine was low of oil was around 6700 miles. I checked it and it was low with at the add oil mark with 3500 miles driven. I received a second message from the app stating the oil was low. Again, I checked the oil and it was to the add oil level with 9014 miles or only been driven 2300 miles. I have contacted Mazda and will take it to the dealership in a few days, but I am having to add and check the oil ever day or so. There seems to be an oil consumption issue with this engine.

- Tupelo , MS, USA

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