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2021 Mazda CX-5: engine and transmission complaints

VERY HIGH COMPLAINT SIGNAL
63%
87 of 139 relevant owner complaints are about the engine, transmission or fuel system

63% of relevant owner complaints filed with NHTSA on the 2021 Mazda CX-5 are about the engine, transmission or fuel system. Well over half of everything owners reported is the drivetrain. That is a severe model-level pattern; every model year we track at this level has a documented failure behind it.

Worse than 83% of the 1,230 model years we track (2010–2023).

Excludes 5 airbag, lighting and seat-belt recall complaints that would otherwise mask the signal (unadjusted: 60%).

NHTSA data checked September 13, 2026
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Drivetrain complaints
87
engine, transmission, fuel
Total complaints
144
this model year
Fires reported
0
owner-reported
Recall campaigns
0
9 crashes · 7 injuries

Complaints by component

ENGINE77 · 53%
UNKNOWN OR OTHER17 · 12%
POWER TRAIN16 · 11%
ELECTRICAL SYSTEM12 · 8%
FORWARD COLLISION AVOIDANCE11 · 8%
SERVICE BRAKES11 · 8%

The years either side

2010
no data
2011
no data
2012
too few complaints
2013
36%
70 of 194
2014
23%
84 of 377
2015
27%
33 of 133
2016
30%
99 of 510
2017
23%
32 of 148
2018
93%
109 of 117
2019
59%
153 of 269
2020
28%
27 of 106
2021
63%
87 of 144
2022
39%
15 of 63
2023
23%
25 of 125

Manufacturers fix things mid-generation. A bad year next to a clean one is common; the fix usually arrived in between.

Cleaner alternatives

Same car, a better year

Other compact SUVs with no elevated signal in 2021

The percentage is each model year's drivetrain complaint share. No elevated signal describes the model year, not any one car; a well-kept example of a flagged model can still be the right buy, and any of these still needs an inspection.

What owners reported

VEHICLE SPEED CONTROL,SERVICE BRAKES,FUEL/PROPUL04/27/2022CRASH2 INJURED
On April 16, 2022, around 6:45PM, I drove my new Mazda CX5 (@ 3500 miles) into our church parking lot and turned right down the first row of cars. It was light out and the weather was pleasant. I turned right into a parking space with my foot on the brake. The car was facing and perpendicular to a sidewalk that was …
ELECTRICAL SYSTEM,STRUCTURE,ENGINE07/28/2025CRASH1 INJURED
..... ON AT LEAST 5 SEPERATE OCCASIONS OUR 2021 MAZDA CX5 SUV ACCELERATED TO A HIGH RATE OF SPEED (ON IT'S OWN). IT HAS DONE IT TO MY WIFE AND I BOTH. I CONTACTED TWO DIFFERENT MAZDA SERVICE CENTERS AND WAS ADVISED THEY HAVE NO KNOWLEDGE OF THIS AND THAT THERE ARE NO OPEN RECALLS OR TSB's AND AS INTERMITTENT AS IT IS I…
ENGINE07/27/2026
The vehicle developed an engine oil leak from the timing cover due to what appears to be premature seal failure. Engine oil was leaking externally and could drip onto hot engine components, creating a potential fire hazard while the vehicle is in operation. The leak also increases the risk of low engine oil levels, whi…

Three of 87 drivetrain complaints. The full report shows more, with quotes about the engine in the car you are looking at first.

Before you buy a 2021 Mazda CX-5

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Experimental model-level information. This is not a vehicle inspection, vehicle-history report, financial advice or purchase recommendation. It describes patterns across a model year, not the condition of any individual vehicle.