HyundaiSonata Hybrid2012Overview/hyundai/sonata-hybrid/2012/base/

2012 Hyundai Sonata Hybrid

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

Body PASSENGER CARTransmission Automatic 6-spd

The 2012 Hyundai Sonata Hybrid is a passenger‑car built on Hyundai’s mid‑size platform and powered by a hybrid powertrain paired with an automatic six‑speed transmission, drawing 4.8 qt of 5W‑20/5W‑30 engine oil. Its EPA ratings of 34 mpg city, 39 mpg highway and 36 mpg combined positioned it among the more fuel‑efficient sedans of its class at launch. Reliability data show that 2012 recorded the highest number of owner complaints—153, primarily centered on the engine—and was subject to six recalls, marking the peak of the model‑year complaint curve within the 2011‑2025 span. Consequently, researchers view the 2012 Sonata Hybrid as a pivotal year for tracking early‑generation hybrid reliability trends in the Sonata lineup.

Model year20152014201320122011

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 economy34/39/36 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 / turnHEADOEM · verified
Tire sizeP205-65R18OEM · verified
Wheel / rim6.5 inOEM · verified

OE service part numbers OEM · verified

Front wiper blades99H09AKA26H alt 99H09AKA18H

Full specifications

Engine, drivetrain, dimensions and economy.

Engine & drivetrain NHTSA vPIC

TransmissionAutomatic 6-spd

Dimensions & weight NHTSA vPIC

Overall length189.8 in
Overall width72.4 in
Overall height57.9 in
Wheelbase110.2 in
Curb weight3344 lb
Track (front / rear)62.6 / 62.6 in
Weight distribution (front / rear)60/40

Ratings & economy EPA / vPIC

EPA city / highway / combined34 / 39 / 36 mpg
DrivetrainFront-Wheel Drive
Passenger volume104 cu ft
Cargo volume11 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 brake fluid. Torque lug nuts to 65-80 ft-lbs, the oil drain plug to 25.3-32.5 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 FluidHyundai SP-IV
Automatic Transmission Fluid Capacity7.5
Automatic Transmission FluidHyundai SP-IV
Automatic Transmission Fluid Capacity7
Brake FluidDOT 3
Engine CoolantETHYLENE GLYCOL
Engine Oil5W-20 · 5W-30 · API
Engine Oil Capacity4.8 qt

Engine torques

Engine Flywheel Bolts86-94 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
Intake Manifold to Engine Bolts14-17 ft-lbs
Exhaust Manifold to Cylinder Head BoltsM8 nut: 18-22 ft-lbs, M10 nut: 25-40 ft-lbs
Engine Oil Pan Drain Plug25.3-32.5 ft-lbs

Chassis torques

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

Ignition

Cylinder Firing Order1-3-4-2
Curb Idle Speed (No Load)600 rpm
Curb Idle Speed Variance (No Load)100 rpm
Ignition Coil Primary Resistance.56-.68 ohms
Ignition Coil Secondary Resistance5950-8050 ohms
Ignition Coil Primary Resistance.56-.68 ohms
Ignition Coil Secondary Resistance5950-8050 ohms
Ignition Timing5, Not adjutstable degrees

Battery & A/C

RefrigerantR134a
Refrigerant Capacity1.16-1.27 lbs
Oil GroupPAG
Oil Type46
Oil Capacity3.04-3.75 oz
Standard BCI Group Number124R
Standard BCI Cranking Performance600 cca
Standard BCI Group Number124R

Service checks

Regulated Fuel System Pressure (With Vacuum)55.0 psi
Engine Compression171
Engine Compression164
Engine Compression164

Brakes

Torque Caliper to Bracket16-23 ft-lbs
Torque to Knuckle47-54 ft-lbs
Torque Caliper to Bracket16-23 ft-lbs
Torque to Knuckle58-72 ft-lbs
Minimum Pad ThicknessFront: 0.079; Rear: 0.079 in
Minimum Shoe Thickness0.039 in
Rotor Max Parallel Variation0.0004 in
Rotor Runout Limit0.0012 in

Multi-step torque procedures OEM · verified

Camshaft Bearing/Carrier Cap Bolts or Studs — tightening sequence 1 stages
1M6 Bolts8–9 ft. lbs
Camshaft Bearing/Carrier Cap Bolts or Studs — tightening sequence 1 stages
1M6 Bolts8–9 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: 23 ft. lbs., Step 3: 120-12511 ft. lbs
Main Bearings — tightening sequence 1 stages
111 ft. lbs., Step 2: 23 ft. lbs., Step 3: 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; spark plugs every 45,000 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 4,800 miEngine Oil (drain & refill) · Engine Oil Filter (replace)
Every 7,500 miEngine Oil (drain & refill) · Engine Oil Filter (replace) · Tire & Wheel Assembly (rotate) · Vacuum Line (inspect)
Every 15,000 miAccessory Drive Belt (inspect) · Air Conditioning System (inspect) · Brake Line (inspect) · Brake System (inspect) · CV Joint Boot (inspect) · Cabin Air Filter (replace)
Every 30,000 miBrake Hydraulic System (inspect fluid) · Engine Air Filter Element (replace) · Engine Coolant System (drain, flush & refill) · Fuel Evaporative Canister Filter (inspect) · Fuel Filter (inspect) · Fuel Line (inspect)
Every 37,500 miTransmission Assembly (inspect fluid level)
Every 45,000 miSpark Plugs (replace)
At 60,000 miAccessory Drive Belt (inspect) · Engine Coolant System (drain, flush & refill)
Every 60,000 miEngine Valves (inspect valve lash)

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 Hyundai Sonata Hybrid sits at the peak of a troubling complaint trend within its generation, recording 153 complaints—the highest of any model year—compared to 95 in 2011 and a drop to 105 in 2013. Engine-related issues dominate at 44 complaints, and the year also saw 5 fire reports and 2 crash reports, alongside 6 recalls and 7 investigations, matching the highest recall and investigation counts in the dataset. While later years like 2014 show a sharp decline to 28 complaints, the 2012 model year represents the apex of early-generation problems before a secondary spike in 2016. The data does not specify root causes, but the concentration of engine complaints and elevated fire incidents points to significant reliability risks. Given this pattern, the 2012 Hyundai Sonata Hybrid is a poor choice within the generation, as it carries the highest complaint burden and notable safety-related reports.

6
Open recalls
NHTSA campaigns
106
Service bulletins
Manufacturer communications
7
ODI investigations
Office of Defects Investigation
153
Owner complaints
2 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 153 complaints on record, top 8 components.

Engine44
Service Brakes, Hydraulic12
Power Train9
Unknown Or Other8
Steering7
Power Train,Engine6
Service Brakes6
Electrical System6

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 2 of 6 campaigns on record for this vehicle.

20V746000EngineReported 01/12/2020

Hyundai Motor America (Hyundai) is recalling certain 2015-2016 Veloster, 2012 Santa Fe, 2011-2013 Sonata Hybrid, and 2016 Sonata Hybrid vehicles. The connecting rod bearings inside the engine may wear prematurely, which… Remedy: Hyundai will notify owners, and dealers will inspect the engine. If bearing damage is found, the engine will be replaced. Dealers will also install a software update containing a…

20V393000Equipment:ElectricalReported 02/07/2020

Hyundai Motor America (Hyundai) is recalling certain 2011-2012 Hyundai Elantra and Sonata Hybrid, 2012 Accent and Veloster vehicles. The 12V accessory socket outlet may have been over-tightened during installation… Remedy: Hyundai will notify owners, and dealers will replace the Tire Mobility Kit accessory outlet plug with a direct-to-battery connection wire harness kit, free of charge. The recall…

Technical service bulletins NHTSA · verified

Showing 5 of 106 bulletins on record with NHTSA.

BulletinDateComponentSummary
DTN DL2026-04-10Air BagsThe National Highway Traffic Safety Administration (NHTSA) has identified the presence of…
DTN DCS2026-04-10Air BagsThe National Highway Traffic Safety Administration (NHTSA) has issued an urgent safety…
26-01-033H TSB2026-03-26EngineThis TSB references the Op codes to use for claim submission and the Parts required based…
26-01-033H DN2026-03-26EngineThis TSB references the Op codes to use for claim submission and the Parts required based…
TRW Settlement DCS2025-12-18Air BagsA Class Action settlement regarding the TRW Airbag was recently decided. Based on the…

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 Sonata Hybrid. OEM
Build data
Plant, GVWR class, engine and body data for any 17-character VIN.
Recalls
Check open recall campaigns against a specific vehicle by VIN.

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 Sonata Hybrid take?

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

Does the 2012 Sonata Hybrid have open recalls?

NHTSA lists 6 recall campaign(s) for this model year. Check your specific vehicle by VIN.

What gas mileage does the Sonata Hybrid get?

EPA figures are 34 city / 39 highway / 36 combined mpg.