Model year report

2012 Kia Optima: what breaks, and at what mileage

What breaks on the 2012 Kia Optima

On the 2012 Kia Optima, the failure owners report most often is other engine problem, and the reports cluster around 104,000 miles. The earliest to appear is parking brake failure, reported by a median of 2,500 miles. Overall it scores 74 out of 100, high risk for a 2012.

High risk for a 2012 — 82nd riskiest of the 271 2012 vehicles we can rate. 1,264 owner reports; fleet size estimated from this year's own recall paperwork.

What breaks on the 2012 Kia Optima

Owners have reported 72 named failure modes on the 2012 Kia Optima, and the three most-reported carry 37% of everything filed.

Other engine problem leads with 263 reports, about 2.0 per 1,000 vehicles and with the middle half of reports between 72k to 129,000 miles.

Other steering problem follows with 131 reports, usually reported between 19k to 90,000 miles. 1 of those report mention a fire.

Other electrical problem follows with 75 reports, usually reported between 45k to 107,500 miles. 13 of those reports mention a fire.

By system, the reports fall mostly into engine (428), steering (186) and electrical (100).

At what mileage it happens

860 of the reports on the 2012 Kia Optima came with an odometer reading, and half of those were filed before 80,000 miles.

Cumulatively, 28% by 50,000 miles, 64% by 100,000 miles and 92% by 150,000 miles of the dated reports had been filed, with 16 filed above the top of the chart.

The busiest stretch is between 0 and 10,000 miles, which alone holds 11% of the dated reports.

21% of the dated reports were filed below 36,000 miles.

In the order they tend to show up: parking brake failure around 2k, other body or interior problem around 12k, other suspension problem around 20k and other wheel or tire problem around 25k.

Median

Other engine problem

104k
Other steering problem

52k
Other electrical problem

78k
Other brake problem

120k
Complete engine failure or seizure

94k
Steering column or shaft failure

70k
No-start or intermittent start failure

99k
Other body or interior problem

12k
Other powertrain problem

73k
Sunroof failure or glass breakage

53k
Fuel pump failure

89k
Other fuel system problem

106k

Tick median reported mileage Solid middle half of reports Faint 10th to 90th percentile Colour how bad the failure is when it happens

Showing the 12 most-reported failure modes of 72. The full list is in the table below.

How reports accumulate

Share of reports filed by each mileage

half by 80k

Every report with an odometer reading, cumulative, from 0 to 200,000 miles. A further 16 reports came in above that, which is why the line stops short of the top. A curve that climbs early is a car with early problems, whatever its total.

Line share of reports filed by that mileage
Dashed the median reported mileage

How bad it is when it goes

Across the named modes, 34 mention a crash, 111 a fire and 30 an injury. Those are the words owners used in their own complaints, and NHTSA does not verify them, but they are the closest thing in this data to a measure of what a failure actually did.

The average severity weight across every report on this year is 4.83, where a stalled engine or a failed airbag weighs many times more than a rattling trim panel, and a figure this high means the reports are dominated by failures with safety consequences rather than annoyances. The weighting is set out in full on the methodology page.

What the top failures cost to put right, as editorial estimates for an independent US shop rather than figures from NHTSA: other engine problem at $300–$4,000, other steering problem at $350–$2,400, other electrical problem at $250–$2,000 and other brake problem at $300–$1,800. Dealer labour, a seized bolt or a part that is no longer made can push any of these past the top of its range.

38% of the reports on this year sit in the engine, transmission, drivetrain or cooling systems — the four where a repair bill is usually four figures.

Every reported failure mode

Mileage figures are percentiles of owner-reported readings. Click a column to sort.
Failure mode	System	Reports	With reading	25th	Median	75th	Per 1,000	Typical repair	Severity
Other engine problem	engine	263	193	72k	104k	129k	2.0	$300–$4,000	High
Other steering problem	steering	131	94	19k	52k	89k	1.0	$350–$2,400	High
Other electrical problem	electrical	75	38	45k	78k	107k	0.6	$250–$2,000	Moderate
Other brake problem	brakes	59	26	83k	120k	137k	0.5	$300–$1,800	High
Complete engine failure or seizure	engine	56	46	74k	94k	120k	0.4	$4,500–$12,000	Critical
Steering column or shaft failure	steering	42	31	54k	70k	93k	0.3	$600–$2,500	Critical
No-start or intermittent start failure	engine	38	35	60k	99k	120k	0.3	$200–$1,800	Moderate
Other body or interior problem	body	37	17	8k	12k	101k	0.3	$200–$2,000	Moderate
Other powertrain problem	transmission	33	25	45k	73k	99k	0.3	$400–$4,500	High
Sunroof failure or glass breakage	body	29	26	38k	53k	64k	0.2	$700–$4,500	High
Fuel pump failure	fuel	28	23	76k	89k	107k	0.2	$600–$2,600	High
Other fuel system problem	fuel	26	18	71k	106k	144k	0.2	$300–$2,200	High
Other speed control problem	adas	25	21	13k	63k	90k	0.2	$250–$2,000	Critical
Airbag warning light or occupant sensor fault	airbag	21	14	77k	90k	103k	0.2	$300–$1,600	High
Stalling while driving	engine	19	17	71k	80k	84k	0.1	$300–$2,500	Critical
Cruise control failure	adas	17	13	71k	74k	78k	0.1	$200–$1,400	High
Excessive oil consumption	engine	15	7	—	80k	—	0.1	$900–$6,500	High
Headlight failure or clouding	lighting	15	13	60k	113k	120k	0.1	$150–$1,800	Moderate
Other wheel or tire problem	wheels	13	10	7k	25k	34k	0.1	$200–$1,500	High
Misfire or rough idle	engine	12	6	—	150	—	0.1	$250–$1,600	Moderate
Steering rack, gear or tie rod failure	steering	11	5	—	60k	—	0.1	$700–$2,600	High
Other suspension problem	suspension	11	10	4k	20k	65k	0.1	$350–$2,000	Moderate
Other visibility problem	glass	11	9	6k	40k	60k	0.1	$150–$1,400	Moderate
Seat belt or retractor failure	airbag	10	4	—	7k	—	0.1	$200–$900	High
Parking brake failure	brakes	9	9	2k	2k	24k	0.1	$250–$1,300	Moderate
Other driver assistance problem	adas	9	7	—	68k	—	0.1	$250–$1,800	High
Oil leak	engine	8	4	—	78k	—	0.1	$250–$2,200	Moderate
Fuel leak or fuel odor	fuel	8	5	—	123k	—	0.1	$300–$2,500	Critical
Other lighting problem	lighting	8	4	—	87k	—	0.1	$120–$1,200	Moderate
Engine bay fire	engine	7	0	—	—	—	0.1	$4,000–$20,000	Critical
Ignition switch, key fob or immobilizer failure	electrical	7	6	—	109k	—	0.1	$250–$1,500	High
Airbag inflator rupture	airbag	7	7	—	60k	—	0.1	$0–$0	Critical
Paint peeling or clear coat failure	body	7	0	—	—	—	0.1	$600–$6,000	Low
Catalytic converter failure	emissions	7	2	—	168k	—	0.1	$900–$3,500	Moderate
Alternator or charging system failure	electrical	6	6	—	117k	—	0.0	$450–$1,600	High
Control module (ECM/PCM/BCM) failure	electrical	6	5	—	20k	—	0.0	$700–$3,000	High
Backup camera failure	infotainment	6	5	—	4k	—	0.0	$250–$1,200	Moderate
Shifter, linkage or stuck-in-park failure	transmission	5	4	—	14k	—	0.0	$250–$1,400	High
Audio or connectivity failure	infotainment	5	5	—	13k	—	0.0	$150–$900	Low
Loss of braking	brakes	5	5	—	110k	—	0.0	$400–$3,000	Critical
Tire blowout or tread separation	wheels	5	5	—	24k	—	0.0	$200–$1,500	Critical
Air conditioning failure	hvac	5	4	—	21k	—	0.0	$400–$2,800	Moderate
Overheating	cooling	4	2	—	80k	—	0.0	$400–$3,500	High
Complete transmission failure	transmission	4	2	—	155k	—	0.0	$2,800–$8,000	Critical
ABS module or sensor failure	brakes	4	1	—	105k	—	0.0	$500–$2,400	High
Airbag failed to deploy in a crash	airbag	4	3	—	65k	—	0.0	$1,000–$5,000	Critical
Alignment fault and uneven tire wear	suspension	4	2	—	8	—	0.0	$150–$1,200	Moderate
Tail light, brake light or signal failure	lighting	4	1	—	133k	—	0.0	$100–$900	Moderate
Electrical fire or melted wiring	electrical	3	3	—	75k	—	0.0	$1,500–$9,000	Critical
Head gasket failure	engine	3	1	—	122k	—	0.0	$1,400–$4,000	Critical
Engine knock or bearing noise	engine	3	3	—	76k	—	0.0	$2,500–$9,000	High
Radiator or coolant leak	cooling	3	2	—	130k	—	0.0	$350–$1,900	High
Transmission will not engage a gear	transmission	3	2	—	125k	—	0.0	$1,500–$6,000	Critical
Wiring harness or short circuit	electrical	3	2	—	75k	—	0.0	$400–$3,500	High
Brake line, hose or caliper failure	brakes	3	0	—	—	—	0.0	$250–$1,600	Critical
Software fault or failed update	software	3	1	—	97k	—	0.0	$0–$600	Moderate
Turbocharger or supercharger failure	engine	2	0	—	—	—	0.0	$1,500–$4,500	High
Fuel tank, filler or EVAP failure	fuel	2	0	—	—	—	0.0	$250–$1,800	Moderate
Infotainment screen failure	infotainment	2	1	—	69k	—	0.0	$400–$2,600	Low
Master cylinder or brake booster failure	brakes	2	1	—	35k	—	0.0	$450–$2,200	Critical
Loss of power steering	steering	2	2	—	113k	—	0.0	$600–$2,800	Critical
Control arm, ball joint or bushing failure	suspension	2	2	—	106k	—	0.0	$400–$2,200	High
Rust or structural corrosion	body	2	2	—	130k	—	0.0	$500–$6,000	High
Exhaust leak or fumes in the cabin	emissions	2	1	—	10k	—	0.0	$250–$2,000	High
Timing chain, belt or tensioner failure	engine	1	1	—	95k	—	0.0	$1,200–$4,500	Critical
Intake carbon buildup	engine	1	0	—	—	—	0.0	$400–$1,200	Moderate
Thermostat failure	cooling	1	0	—	—	—	0.0	$250–$900	Moderate
Instrument cluster or gauge failure	infotainment	1	1	—	89k	—	0.0	$350–$1,400	Moderate
Premature brake pad or rotor wear	brakes	1	0	—	—	—	0.0	$300–$1,400	Moderate
Strut, shock or spring failure	suspension	1	1	—	63k	—	0.0	$500–$2,000	Moderate
Tire pressure monitor failure	wheels	1	1	—	18k	—	0.0	$80–$600	Low
Other seat belt problem	airbag	1	0	—	—	—	0.0	$200–$900	High
Unclassified problem	other	75	38	68k	95k	118k	0.6	—	Moderate

Rate per 1,000 uses a fleet-size estimate derived from recall paperwork for this exact model year. It is a lower bound. Repair costs are typical independent-shop ranges for the failure, not figures from these reports.

How often, against how many were built

Scaled by an estimate of how many of these cars exist, the 2012 Kia Optima draws about 9.8 per 1,000 vehicles, which puts it in the 90th percentile of complaint rates among 2012 vehicles we can rate.

That denominator is the weakest number on the page and it is fair to say so plainly. Rate per 1,000 uses a fleet-size estimate derived from recall paperwork for this exact model year. It is a lower bound.

The working figure is 128,999 vehicles. If the true number is twice that, every rate on this page is half what it says; the ranking against other 2012 vehicles, which is what the risk score uses, is far more robust than the rate itself.

What owners wrote

Verbatim from NHTSA complaint narratives, trimmed for length. The odometer reading is the one the owner gave.

Recalls on the 2012 model year

NHTSA has issued 5 recall campaigns covering the 2012 Kia Optima, affecting an estimated 261,338 vehicles. A recall is a different kind of evidence from a complaint: it is the regulator and the manufacturer agreeing that something has to be fixed, and the fix is free for as long as the car exists.

The campaigns cover service brakes, hydraulic:antilock/traction control/electron, structure:body:roof and pillars, fuel system, gasoline:delivery:hoses, lines/piping, and fitt and air bags: air bag/restraint control module. Whether the work was actually done on the car in front of you is a question only the VIN can answer, and the manufacturer or NHTSA will answer it free.

One caution about reading these together: a recall usually raises the complaint count for the same part, because owners who read about it go and file. The mileages stay informative; the counts get noisy.

23V652000

SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:CONTROL UNIT/MODULE

1,730,192 vehicles 2023-09-25

Defect: Kia America, Inc. (Kia) is recalling certain 2010-2019 Borrego, 2014-2016 Cadenza, 2010-2013 Forte, Forte Koup, Sportage, 2015-2018 K900, 2011-2015 Optima, 2011-2013 Optima Hybrid, Soul, 2012-2017 Rio, 2011-2014 Sorento, and 2010-2011 Rondo vehicles. The Hydraulic Electronic Control Unit (HECU) may experience an electrical short, which can result in an engine compartment fire while parked or driving.
Consequence: An engine compartment fire while parked or driving can increase the risk of injury.
Remedy: Owners are advised to park outside and away from structures until the recall repair is complete. Dealers will replace the HECU fuse, free of charge. Interim notification letters, notifying owners of the safety risk, were mailed November 14, 2023. Owner notification letters were mailed March 29, 2024 through June 18, 2024. Owners may contact Kia customer service at 1-800-333-4542. Kia's number for this recall is SC284.

22V560000

STRUCTURE:BODY:ROOF AND PILLARS

257,998 vehicles 2022-08-01

Defect: Kia America, Inc. (Kia) is recalling certain 2012-2013 Optima vehicles. The right and left headliner plates may not be secured properly, which can result in the plates detaching in the event of a side curtain air bag deployment.
Consequence: A plate that detaches during a crash may strike an occupant, increasing their risk of injury.
Remedy: Dealers will secure the headliner plates, free of charge. Owner notification letters were mailed September 26, 2022. Owners may contact Kia customer service at 1-800-333-4542. Kia's number for this recall is SC245.

18V907000

FUEL SYSTEM, GASOLINE:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS

71,653 vehicles 2018-12-19

Defect: Kia Motors America (Kia) is recalling certain 2011-2017 Optima, 2012-2017 Sorento and 2011-2018 Sportage vehicles that previously received an engine replacement under recall number 17V-224, warranty, or the Knock Sensor Detection System (KSDS) Product Improvement Campaign. The high pressure fuel pipe that connects to the fuel pump outlet may have been damaged, misaligned or improperly torqued during the engine replacement procedure, possibly causing a fuel leak.
Consequence: A fuel leak in the presence of an ignition source can increase the risk of a fire.
Remedy: Kia has notified owners, and dealers will inspect and replace the fuel pipe, as necessary, free of charge. The recall began January 17, 2019. Owners may contact Kia customer service at 1-800-333-4542. Kia's number for this recall is SC172.

18V363000

AIR BAGS: AIR BAG/RESTRAINT CONTROL MODULE

507,587 vehicles 2018-06-01

Defect: Kia Motors America (Kia) is recalling certain 2010-2013 Kia Forte, Forte Koup, 2011-2013 Kia Optima and 2011-2012 Kia Optima Hybrid and Sedona vehicles. In the event of a crash, the air bag control unit (ACU) may short circuit, preventing the frontal air bags and seat belt pretensioners from deploying.
Consequence: If the frontal air bags and seat belt pretensioners are disabled, there is an increased risk of injury to the vehicle occupants in the event of a vehicle crash that necessitates deployment of these safety systems.
Remedy: Kia will notify owners. For model year 2011 Sedona vehicles, Kia will instruct dealers to verify the ACU part number and, if necessary, install an extension wire harness kit between the ACU Connector and the Vehicle Harness Connector. For all other affected vehicles, Kia will instruct dealers to install the extension wire harness kit. The recall began September 28, 2018. Owners may contact Kia customer service at 1-800-333-4542. Kia's number for this recall is SC165.

17V224000

ENGINE AND ENGINE COOLING:ENGINE

618,160 vehicles 2017-03-31

Defect: Kia Motor Company (Kia) is recalling certain 2011-2014 Optima, 2012-2014 Sorento and 2011-2013 Sportage vehicles. Machining errors during the engine manufacturing process may cause premature bearing wear within the engine.
Consequence: Bearing wear may result in the engine seizing, increasing the risk of a crash.
Remedy: Kia will notify owners, and dealers will inspect the engine assembly, and replace the engine if necessary, free of charge. The recall began June 20, 2017. Owners may contact Kia customer service at 1-800-333-4542. Kia's number for this recall is SC147.

Recall work is free at a franchised dealer regardless of the car's age. Check the VIN at nhtsa.gov/recalls before assuming it was done.

How it ranks in the 2012 field

The score at the top of the page, placed among its peers. The zones are the same thresholds the scorer applies, read out of the scorer itself, so the picture and the band word cannot disagree.

Risk score against the rest of the 2012 field

Scores are ranked within the model year, never across years, because an older car has had longer to accumulate reports.

Left fewer and less serious reports
Right more, or worse
Marker this vehicle

How 2012 compares with the other years

High risk for a 2012 — 82nd riskiest of the 271 2012 vehicles we can rate. The comparison is always within the same model year, so an older car is never penalised for having had longer to break.

Across the 20 model years of this car that carry enough reports to score, 2005 comes out best at 57 and 2019 worst at 80, with 2012 itself at 74.

If the model year is negotiable, 2005, 2003, 2007, 2006, 2004, 2002, 2010, 2009, 2001 and 2008 score lower than 2012 by a margin worth acting on. Same body, same engines, different luck — usually a supplier change or a mid-cycle fix, which the complaint data can show but never explain.

Within the 2011–2016 generation specifically, 2012 is the strongest year at 74 and 2016 the weakest at 77.

Scores compare each year against other cars of the same model year, so a low number on an older car is a real result and not an artefact of age.

Risk score by model year, out of 100

Shorter is better. Years with too few reports to score are shown without a bar rather than as a zero, because no data is not good news.

Within the 2011-2016 generation, 2012 Kia Optima scores best at 74 and 2016 Kia Optima worst at 77.

What the numbers say to check

The mileages below are where the first quarter of reports for each mode had already been filed, which makes them the point at which a fault is worth looking for rather than the point at which it happens: parking brake failure from about 2k, other suspension problem from about 4k, other visibility problem from about 6k and other wheel or tire problem from about 7k.

On a 2012 Kia Optima with more miles than that on it, the useful question to put to a seller or a mechanic is whether parking brake failure has been dealt with, and if so with what parts and at whose expense. A car that has already had the repair is in a different position from one that has not.

Treat it as where to point the inspection, not as a prediction. A well-maintained example can sail past every mileage on this page, and a neglected one can fail well before the first of them.

The limits of complaint data

1,264 owner reports; fleet size estimated from this year's own recall paperwork. Every count on this page is therefore a floor: it is the number of owners who went to the trouble of filing with a federal agency, which is a small and self-selected fraction of the owners who had the fault.

Of those 1,264 reports, 860 carried an odometer reading, so the mileages here describe 68% of the sample rather than all of it. Owners also round: readings pile up on multiples of ten thousand, which is why this site publishes "about 90,000 miles" and not "91,438".

The failure modes are assigned by software reading the owner's own words, which is accurate in bulk and wrong in individual cases. A mode with a handful of reports may contain a misfiled one.

And nothing here predicts what one car will do. These are other people's complaints, filed years apart, on cars maintained by strangers. Read the page as a map of where this model year has previously gone wrong, then have the specific car in front of you inspected.

Questions this page answers

What are the most common problems with the 2012 Kia Optima?

The most-reported failures are other engine problem (263 reports, median 104,000 miles), other steering problem (131 reports, median 52,500 miles) and other electrical problem (75 reports, median 77,500 miles). Counts come from owner complaints filed with NHTSA, which are voluntary, so they show what owners bothered to report rather than every fault that occurred.

At what mileage do 2012 Kia Optima problems start?

Parking brake failure is the earliest failure mode to show up, with a median reported mileage of 2,500 miles and a quarter of reports before 2,100 miles. Across all failure modes on this year, the median report sits at 80,000 miles.

Is the 2012 Kia Optima reliable?

It scores 74 out of 100 on our risk index, which is high — 82nd riskiest of the 271 2012 vehicles we can rate. The score is a comparison against other 2012 vehicles, not a prediction about any individual car, and it is built from complaint rates, severity and how early failures appear.

Which year of the Kia Optima is best?

Within the 2011–2016 generation, 2012 scores best at 74 out of 100 and 2016 worst at 77. Same body, same engines, different luck.

Where this comes from. Every figure above is computed from NHTSA owner complaints and recall records for this exact make, model and year. Complaints are voluntary and self-selected, so treat counts as a floor. The methodology page writes out each formula, and the same numbers are available as JSON.

What breaks at my mileage Compare with another car

Source Owner complaints and recall records published by the US National Highway Traffic Safety Administration, model years 1996–2027 Figures rebuilt 30 August 2026 Published by AtWhatMileage How every figure is computed