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2021 Kia Sportage: engine and transmission complaints

VERY HIGH COMPLAINT SIGNAL
60%
29 of 48 relevant owner complaints are about the engine, transmission or fuel system

60% of relevant owner complaints filed with NHTSA on the 2021 Kia Sportage 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 80% of the 1,230 model years we track (2010–2023).

Excludes 2 airbag, lighting and seat-belt recall complaints that would otherwise mask the signal (unadjusted: 58%).

NHTSA data checked September 13, 2026
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Drivetrain complaints
29
engine, transmission, fuel
Total complaints
50
this model year
Fires reported
7
owner-reported
Recall campaigns
2
3 crashes · 4 injuries

Complaints by component

ENGINE21 · 42%
UNKNOWN OR OTHER14 · 28%
ENGINE AND ENGINE COOLING6 · 12%
ELECTRICAL SYSTEM6 · 12%
POWER TRAIN3 · 6%
FUEL/PROPULSION SYSTEM2 · 4%

The years either side

2010
too few complaints
2011
60%
101 of 181
2012
88%
341 of 392
2013
85%
320 of 380
2014
63%
75 of 122
2015
66%
91 of 146
2016
54%
66 of 130
2017
67%
250 of 399
2018
65%
103 of 163
2019
65%
41 of 69
2020
56%
87 of 160
2021
60%
29 of 50
2022
52%
23 of 46
2023
35%
95 of 284

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

Cleaner alternatives

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

ENGINE AND ENGINE COOLING,ELECTRICAL SYSTEM10/02/2025FIRE2 INJURED
The contact owns a 2021 Kia Sportage. The contact stated that her mother was driving at an undisclosed speed on the freeway and had stopped on the shoulder of the road to access the navigation system. The contact stated that after the driver shifted to park(P), the driver noticed smoke. The contact's grand-mother who w…
ENGINE AND ENGINE COOLING,VEHICLE SPEED CONTROL08/20/2026
See attached document for complaint.
ENGINE08/11/2026
The hose connected on the antifreeze leak into the engine compartment

Three of 29 drivetrain complaints. The full report shows more, with quotes about the engine in the car you are looking at first.

Recall campaigns on this model year (2)

SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:CONTROL UNIT/MODULE
Kia Motors America (Kia) is recalling certain 2017-2021 Sportage and Cadenza vehicles. The electrical circuit in the Hydraulic Electronic Control Unit (HECU) may short-c…
TRAILER HITCHES
Kia America, Inc. (Kia) is recalling certain 2016-2022 Sorento, 2021-2022 Sorento Hybrid (HEV), 2022-2023 Sorento Plug-In Hybrid (PHEV), and 2017-2022 Sportage vehicles e…

This does not say whether a particular car has an open, unrepaired recall. That depends on the VIN.

Before you buy a 2021 Kia Sportage

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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.