"How reliable is the 2020 Mazda Cx-9?"

"Based on 23 NHTSA complaints, the 2020 Mazda Cx-9 has a median complaint mileage of 0 miles. The most common issue is ENGINE."

"What are common problems with the 2020 Mazda Cx-9?"

"The most frequently reported component in NHTSA complaints for the 2020 Mazda Cx-9 is ENGINE, accounting for a significant portion of the 23 total complaints filed."

2020 Mazda Cx-9: Reliability Data

Source: NHTSA — 23 complaints

Total Complaints

ENGINE

Top Issue

Crash Reports

What Fails?

Most reported component issues from NHTSA complaints.

ENGINE

ELECTRICAL SYSTEM

UNKNOWN OR OTHER

POWER TRAIN

FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING

SERVICE BRAKES

STRUCTURE:BODY

VISIBILITY/WIPER

FUEL/PROPULSION SYSTEM

TIRES

Severity Assessment

Crashes

Fires

Injuries

Deaths

Sample Complaint Reports

"THE MAZDA CX-9 UNCOMMANDED ENGINE ACCELERATION REPORTED HEREIN DID NOT RESULT IN ANY DAMAGE PRIMARILY BECAUSE IT COMMENCED SEVERAL SECONDS AFTER I BEGAN LIGHT BRAKING WHILE APPROACHING A RED TRAFFIC LIGHT. MY IMMEDIATE RESPONSE WAS TO INCREASE BRAKE PRESSURE; THERE WAS NO NEED FOR ME TO MOVE MY LEG..."

"FUEL CAP LIGHT ON IN DEC 2020. OUR CAR MILEAGE ~14,000 MILES . WE BOUGHT BRAND NEW CX9 2020 IN AUGUST. DEALER INSPECTED IT AND FOUND NOTHING WRONG. DEALER REPROGRAMMED IT. A MONTH LATER JAN 1,2021, FUEL CAP LIGHT IS ON ON AGAIN. WE IGNORED IT THINKING IT IS ANOTHER PROGRAM ISSUE. CAR STARTED TO JER..."

"The 2020 Mazda completely shut off following an exit from an expressway, turn under a bridge and slow down for a red light. The Mazda electrically shut off and coasted to a braked stop in the center lane of a 3 lane road. The entire electrical system went dead, no exterior lights, signals, instrumen..."

Source: NHTSA ODI Complaints Database. Names and identifying details omitted.

When Were Complaints Filed?

Number of complaints by the year the issue occurred.

Where Are Complaints Coming From?

Top states by complaint count.

CA: 4 FL: 3 MO: 3 VA: 3 NY: 2 DE: 2 MN: 1 WA: 1 SC: 1 TX: 1

Mazda Cx-9 — Other Years

See how this model compares across different model years.

Year	Complaints	Median Mileage	Top Issue	Crashes
2007	98	94,500	SUSPENSION	3
2008	229	104,000	SUSPENSION	14
2009	65	80,000	SERVICE BRAKES	2
2010	193	71,000	SERVICE BRAKES	6
2011	206	75,200	SERVICE BRAKES	10
2012	263	55,000	SERVICE BRAKES	14
2013	79	53,000	ENGINE	7
2014	73	52,789	ENGINE	1
2015	45	65,000	ENGINE	1
2016	140	32,200	ENGINE	6
2017	76	33,500	ENGINE	0
2018	162	18,500	ENGINE	6
2019	69	28,000	ENGINE	1
2021	41	51,093	ENGINE	10

Data source: View this vehicle on NHTSA.gov | NHTSA ODI Complaints Database. Public domain.

Methodology: Complaint counts and mileage distributions are computed directly from consumer-reported NHTSA complaints. This data represents reported issues, not failure rates — vehicles without complaints are not represented. Full methodology.

Data through: 2026-03-28