2012 KIA Optima Power Train Problems

Source: NHTSA · Updated Oct 9, 2026 · 54 complaints analyzed

Owners have filed 54 complaints with NHTSA about power train problems on the 2012 KIA Optima, 6% of all complaints for this model year. Half of the reports with a mileage happened before 78,993 miles.

At what mileage do power train problems happen?

Based on 42 complaints that reported the odometer reading.

Under 10k miles4 · 10%
10k–25k miles3 · 7%
25k–50k miles4 · 10%
50k–75k miles8 · 19%
75k–100k miles12 · 29%
100k–150k miles10 · 24%
150k+ miles1 · 2%

How serious are the reports?

Of 54 complaints, 1 mention a crash, 1 a fire.

KIA Optima power train complaints by model year

Peak: 2016, with 74 complaints
2001: 122001122002: 662003: 8200382004: 882005: 3200532006: 14142007: 132007132008: 18182009: 332009332010: 24242011: 252011252012: 54542013: 642013642014: 20202015: 492015492016: 74742017: 212017212018: 18182019: 172019172020: 2727

n = 508 complaints · Source: NHTSA

Model yearPower Train complaintsShare of that yearMedian miles
2020 Optima2718%—
2019 Optima178%19,600
2018 Optima188%26,475
2017 Optima218%36,500
2016 Optima7410%50,000
2015 Optima495%82,794
2014 Optima203%93,242
2013 Optima645%64,837
2012 Optima546%78,993
2011 Optima254%36,000
2010 Optima2432%73,000
2009 Optima3328%62,000
2008 Optima1813%130,000
2007 Optima138%72,000
2006 Optima149%61,100
2005 Optima32%34,000
2004 Optima84%22,100
2003 Optima86%33,000
2002 Optima66%86,020
2001 Optima128%11,750

When owners reported it

Peak: 2021, with 12 complaints
2012: 5201252013: 3201332014: 1201412015: 3201532016: 3201632017: 3201732018: 3201832019: 7201972020: 5202052021: 122021122022: 3202232024: 1202412025: 3202532026: 220262

n = 54 complaints · Source: NHTSA

Related recalls (0)

No safety recall lists power train for the 2012 KIA Optima. A pattern of complaints does not always lead to a recall.

What owners report

Short excerpts of recent complaints, with personal details removed. Full reports are on NHTSA.gov.

Sudden engine failure while driving with no warning. Vehicle began jerking, shaking, and losing power. RPMs dropped unexpectedly and the engine stalled intermittently. Multiple misfire codes were present (cylinders 1, 3, and 4), and the engine was found to have low or no compression in cylinder 1…

Received Apr 30, 2026 · NHTSA complaint 11734770

The contact owns a 2012 Kia Optima. The contact stated that while parking the vehicle, the gear shifter was shifted into park; however, the message to shift to park was displayed. In addition, the contact stated that there was a delay while shifting gears. The vehicle was taken to the dealer…

Received Jan 28, 2026 · NHTSA complaint 11714024

The failure involves the component covered under the active safety recall campaign. The affected part/system is still installed on the vehicle and is available for inspection upon request by the manufacturer, dealership, or NHTSA. Recall number : 23V6552 While driving in traffic, the vehicle…

Received Dec 13, 2025 · NHTSA complaint 11704849

Frequently asked questions

Do all 2012 KIA Optimas have power train problems?

No. NHTSA has 54 owner complaints about power train for the 2012 KIA Optima (6% of the 920 complaints for this model year). Complaint data shows that the problem is reported, not how many of all cars sold are affected.

Was there a recall on the 2012 KIA Optima power train?

No recall currently lists power train for this vehicle.

At what mileage do power train problems start?

The median reported mileage is 78,993 miles: half of the reports with a mileage came before that.

Other 2012 KIA Optima problems

See all 2012 KIA Optima problems or power train problems across all Optima years.