KiaOptima Hybrid2012Overview/kia/optima-hybrid/2012/base/

2012 Kia Optima Hybrid

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2012 Optima Hybrid.

Body PASSENGER CARTransmission Automatic 6-spd

The 2012 Kia Optima Hybrid is a passenger‑car sedan that uses a 4.8‑qt engine oil capacity with a 5W‑20/5W‑30 API specification and is mated to an automatic six‑speed transmission, delivering EPA‑rated fuel economy of 34 mpg city, 38 mpg highway and 36 mpg combined. With 107 total owner complaints—most frequently concerning the engine—and three recalls recorded for the model year, its reliability sits well below the peak of 202 complaints seen in 2019 but above the single complaint logged for the 2020 Optima Hybrid. This places the 2012 example toward the lower‑end of the complaint range for the 2011‑2020 Optima Hybrid lineage.

Model year20182017201620152014201320122011

Quick specs

Fluid capacities, tune-up values and fuel economy at a glance.

Engine oil capacity4.8 qtOEM · verified
Engine oil type5W-20 / 5W-30 APIOEM · verified
Lug nut torque65-80 ft-lbsOEM · verified
EPA fuel economy34/38/36 mpgEPA · verified

Fitment & sizes

Replacement part sizes and factory part numbers — battery, bulbs, filters and belts.

From the factory this vehicle uses a BCI 124R · 600 CCA battery. Each part links to every other vehicle that shares it, so a part you already stock may fit more of your fleet than you'd expect.

Battery groupBCI 124R · 600 CCAOEM · verified
Tail / brake / turnOFFOEM · verified

Full specifications

Engine, drivetrain, dimensions and economy.

Engine & drivetrain NHTSA vPIC

TransmissionAutomatic 6-spd

Dimensions & weight NHTSA vPIC

Overall length190.6 in
Overall width72 in
Overall height57.1 in
Wheelbase110.2 in
Curb weight3490 lb
Track (front / rear)62.2 / 62.2 in
Weight distribution (front / rear)60/40

Ratings & economy EPA / vPIC

EPA city / highway / combined34 / 38 / 36 mpg
DrivetrainFront-Wheel Drive
Passenger volume102 cu ft
Cargo volume10 cu ft
Recommended fuelRegular Gasoline

Service quick specs OEM factory data

Capacities, torques and tune-up values from the factory service manual.

This engine holds 4.8 qt of 5W-20 / 5W-30 API engine oil, DOT 3 · DOT 4 brake fluid. Torque lug nuts to 65-80 ft-lbs, the oil drain plug to 29.0 ft-lbs. The firing order is 1-3-4-2. Note the cylinder-head bolts finish on a torque angle (torque-to-yield) — they stretch permanently and should be replaced, not reused, during any head service.

Lubricants & capacities

Automatic Transmission FluidATF
Automatic Transmission Fluid Capacity8.2
Automatic Transmission FluidATF
Automatic Transmission Fluid Capacity7.5
Automatic Transmission FluidATF
Automatic Transmission Fluid Capacity7.7
Brake FluidDOT 3 · DOT 4
Engine CoolantETHYLENE GLYCOL

Engine torques

Crankshaft Pulley and/or Damper Bolts123-130 ft-lbs
Crankshaft Pulley and/or Damper Bolts123-130 ft-lbs
Engine Flywheel Bolts87-94 ft-lbs
Engine Flywheel Bolts87-94 ft-lbs
Engine Flywheel Bolts87-94 ft-lbs
Intake Manifold to Engine Bolts14-17 ft-lbs
Exhaust Manifold to Cylinder Head Bolts36-40 ft-lbs
Engine Oil Pan Drain Plug29.0 ft-lbs

Chassis torques

Lug Nuts65-80 ft-lbs
Front Wheel Hub159-188 ft-lbs

Ignition

Cylinder Firing Order1-3-4-2
Ignition Coil Primary Resistance.56-..68 ohms
Ignition Coil Secondary Resistance5950-8050 ohms
Ignition Coil Primary Resistance.59-.68 ohms
Ignition Coil Secondary Resistance5950-8050 ohms
Ignition Timing6, Not adjustable degrees
Ignition Timing Acceptable Variance10 degrees
Ignition Timing Reference RPMIdle rpm

Battery & A/C

RefrigerantR134a
Refrigerant Capacity1.15-1.27 lbs
Oil GroupPOE
Oil Capacity3.70-4.40 oz
RefrigerantR134a
Refrigerant Capacity1.15-1.18 lbs
Oil GroupPAG
Oil Type46

Service checks

Pressure Test14-18 psi
Radiator Cap Pressure Relief14-18 psi
Thermostat Opening Temperature190 °F
Regulated Fuel System Pressure (With Vacuum)70.0-75.0 psi
Regulated Fuel System Pressure (With Vacuum)72.0-73.0 psi
Injector Primary Resistance1.25 @ 68 degreesF ohms
Injector Primary Resistance1.18-1.31 @ 68 degreesF ohms
Engine Compression135-156 PSI. 15 Maximum variation PSI

Brakes

Torque Caliper to Bracket16-23 ft-lbs
Torque to Knuckle58-72 ft-lbs / 47-54 ft-lbs
Minimum Pad Thickness0.078 in
Rotor Max Parallel Variation0.0004 in / 0.0002 in
Rotor Nominal Thickness From0.393 in / 1.102 in
Rotor Nominal Thickness To0.393 in / 1.102 in
Rotor Discard at or Under0.33 in / 1.039 in

Multi-step torque procedures OEM · verified

Connecting Rod (Large End) Bearings — tightening sequence 1 stages
113-16 ft. lbs., Step 2: 9013–16 ft. lbs
Connecting Rod (Large End) Bearings — tightening sequence 1 stages
113-16 ft. lbs., Step 2: 9013–16 ft. lbs
Connecting Rod (Large End) Bearings — tightening sequence 1 stages
113-16 ft. lbs, Step 2: 9013–16 ft. lbs
Cylinder Head — tightening sequence 3 stages

Prep Do not reuse old bolts. Do not allow oil on cylinder head bolts. Apply Loctite 5900H or equivalent on the front edge of the cylinder head gasket. Both the upside and the down side. Assembly of the cylinder head must be completed within five minutes of applying the liquid gasket compound.

124.0-27.0 ft. lbs.24–27 ft. lbs
290 degrees-95 degrees90 degrees
390 degrees-95 degrees90 degrees
Main Bearings — tightening sequence 1 stages
111 ft. lbs., Step 2: 20-23 ft. lbs., Step 3: 120-12511 ft. lbs
Main Bearings — tightening sequence 1 stages
111 ft. lbs., Step 2: 20-23 ft. lbs., Step 3: 120-12511 ft. lbs
Main Bearings — tightening sequence 1 stages
111 ft. lbs., Step 2: 20-23 ft. lbs., Step 3: 120-12511 ft. lbs

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the engine oil and filter at 3,000 mi; coolant every 30,000 mi. The big-interval services (every 30,000 mi for coolant, and the transmission fluid) are the ones owners most often skip — on a lower-mileage example, assume the original fluids are still in it and check them first.

At 3,000 miEngine Oil (drain & refill) · Engine Oil Filter (replace)
Every 5,000 miEngine Oil (drain & refill) · Engine Oil Filter (replace)
At 7,500 miBody Fasteners (inspect) · Brake Drum Assembly (inspect) · Brake Hydraulic System (inspect fluid level) · Brake Linings (inspect) · Brake Rotor (inspect) · Suspension System (torque)
Every 7,500 miAccessory Drive Belt (inspect) · Engine Air Filter Element (inspect) · Engine Oil (drain & refill) · Engine Oil Filter (replace) · Fuel Tank (add fluid conditioner) · Tire & Wheel Assembly (rotate)
Every 15,000 miAccessory Drive Belt (inspect) · Air Conditioning System (inspect) · Body Fasteners (inspect) · Brake Drum Assembly (inspect) · Brake Hydraulic System (inspect fluid level) · Brake Line (inspect)
At 30,000 miBody Fasteners (inspect) · Brake Drum Assembly (inspect) · Brake Hydraulic System (inspect fluid level) · Brake Linings (inspect) · Brake Rotor (inspect) · Suspension System (torque)
Every 30,000 miEngine Coolant System (drain, flush & refill) · Fuel Evaporative Canister Filter (inspect) · Fuel Filter (inspect) · Fuel Line (inspect) · Fuel System (inspect) · Hybrid Inverter (drain, flush & refill coolant)
Every 37,500 miTransmission Assembly (inspect fluid level)
At 60,000 miAccessory Drive Belt (inspect)

Reliability & federal safety record

Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.

The 2012 model recorded 107 complaints, which exceeds the 34 complaints in 2011 and the 51 complaints in 2013. Recalls remained at 3, matching 2011 but higher than the zero recalls in 2014‑2016, while investigations rose to 7, comparable to 2013. Engine‑related issues accounted for 52 of the complaints, making it the dominant complaint area for that year. Crash and fire complaints each numbered five, indicating isolated safety reports but not a systemic pattern. Given the spike in complaints yet stable recall count, the 2012 Optima Hybrid presents a moderate risk and may still be a viable purchase if the vehicle’s service history is clean.

3
Open recalls
NHTSA campaigns
134
Service bulletins
Manufacturer communications
7
ODI investigations
Office of Defects Investigation
107
Owner complaints
5 involved a crash · 5 a fire
NHTSA crash-test rating federal NCAP · out of 5 stars
Overall★★★★★
Frontal★★★★★
Side★★★★★
Rollover★★★★★
Owner complaints by model year NHTSA · this generation & adjacent

Owner complaints filed with NHTSA, by component

All 107 complaints on record, top 8 components.

Engine52
Electrical System,Engine7
Steering5
Power Train,Electrical System,Engine4
Service Brakes4
Unknown Or Other3
Power Train3
Service Brakes, Hydraulic2

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 2 of 3 campaigns on record for this vehicle.

20V750000EngineReported 02/12/2020

Kia Motors America (Kia) is recalling certain 2012-2013 Sorento, 2012-2015 Forte and Forte Koup, 2011-2013 Optima Hybrid, 2014-2015 Soul, and 2012 Sportage vehicles. An engine compartment fire can occur while driving. Remedy: Kia will notify owners, and dealers will inspect the engine compartment for fuel and/or engine oil leaks, perform an engine test and make any repairs, including engine…

18V363000Air Bags: Air Bag/Restraint Control ModuleReported 01/06/2018

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… 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…

Technical service bulletins NHTSA · verified

Showing 5 of 134 bulletins on record with NHTSA.

BulletinDateComponentSummary
PS7972025-12-09Back Over PreventionPITSTOP: TECHNICAL OPERATIONS: EXTERNAL DAMAGE TO ULTRASONIC SENSOR: This Pitstop…
TSB_TRA046_R52025-04-17Power TrainTECHNICAL SERVICE BULLETIN: TRANSMISSION FLUID APPLICATION GUIDE - This bulletin has been…
PI2002YZ_TSB_R32024-11-07EngineTECHNICAL SERVICE BULLETIN: PRODUCT IMPROVEMENT CAMPAIGN: ENGINE REPLACEMENT INSTRUCTIONS…
TSB_TRA046_R42024-05-16Power TrainThis bulletin provides information relating to the correct transmission fluid type and…
TSB_CLI049_R12023-06-26Electrical SystemTECHNICAL SERVICE BULLETIN: PARTIAL REPAIR - ELECTRICAL A/C COMPRESSOR - This bulletin…

Common OBD-II trouble codes

The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.

P0420
Catalyst system efficiency below threshold — Bank 1
P0300
Random / multiple cylinder misfire detected
P0171
System too lean — Bank 1
P0455
Evaporative emission system leak detected — large leak
P0128
Coolant thermostat below regulating temperature
P0442
Evaporative emission system leak detected — small leak

VIN tools

Decode factory build data for a specific vehicle by VIN.

VIN
Decode a VIN to confirm the transmission and build data for a specific Optima Hybrid. OEM
Build data
Plant, GVWR class, engine and body data for any 17-character VIN.
Recalls
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Vehicles with shared specs

Find every vehicle that shares this one's battery, bulbs, oil capacity, platform or parts.

Reference guides

Cross-vehicle references for the kinds of data on this page.

Frequently asked

How much oil does the 2012 Optima Hybrid take?

4.8 qt of 5W-20 OR 5W-30 API SM, per the factory manual.

Does the 2012 Optima Hybrid have open recalls?

NHTSA lists 3 recall campaign(s) for this model year. Check your specific vehicle by VIN.

What gas mileage does the Optima Hybrid get?

EPA figures are 34 city / 38 highway / 36 combined mpg.