Vehicle Segment:
Mid-size Sedan
Key Competitors 2006:
Toyota Camry, Honda Accord, Nissan Altima, Ford Fusion, Chevrolet Malibu
Vehicle Value Proposition:
Affordable pricing, spacious interior, improving reliability and features compared to earlier generations.
Manual Value Proposition:
Comprehensive coverage for mechanics and enthusiasts, enabling thorough maintenance and repair.
Engine Mechanical:
Full Engine Assembly, Cylinder Head, Crankshaft, Pistons, Connecting Rods, Valve Train, Timing System
Engine Management:
Fuel System (MPI, Injectors, Fuel Pump), Ignition System, Emission Control Systems, Engine Control Module (ECM) Diagnostics
Transmission Manual:
Manual Transmission Overhaul, Clutch System, Shift Linkage
Transmission Automatic:
Automatic Transmission Overhaul, Torque Converter, Valve Body, Gear Ratios, Transmission Fluid Specifications
Drivetrain:
Front Wheel Drive (FWD) Axles, CV Joints, Differential
Brakes:
Front and Rear Brake Systems (Discs/Drums), ABS System, Brake Fluid Specifications, Bleeding Procedures, Parking Brake
Suspension:
Front and Rear Suspension Components (Struts, Shocks, Control Arms, Bushings), Alignment Specifications
Steering:
Power Steering System, Steering Rack and Pinion, Steering Column
Electrical System:
Battery, Charging System (Alternator), Starting System (Starter Motor), Fuses, Relays, Wiring Diagrams, Lighting Systems
Body And Chassis:
Body Panel Repair, Door Mechanisms, Glass, Upholstery, Frame Structure
HVAC:
Heating, Ventilation, and Air Conditioning (HVAC) System, Refrigerant, Components, Troubleshooting
Comfort And Convenience:
Power Windows, Power Locks, Mirrors, Seat Adjustments, Sunroof
Routine Maintenance:
Oil Changes, Filter Replacements, Spark Plug Replacement, Fluid Level Checks
Troubleshooting:
Diagnostic Charts, Symptom-Based Troubleshooting for All Major Systems
Major Repairs:
Engine Rebuilds, Transmission Overhauls, Suspension Component Replacement, Brake System Repairs
Component Replacement:
Detailed instructions for replacing most vehicle components
Wiring Diagrams:
Comprehensive Electrical Schematics for all systems
Depth Of Coverage:
Complete Rebuilds, Advanced Diagnostics, Component-Level Repair
Engine Code:
G4KA (2.4L DOHC)
Engine Type:
Inline 4-Cylinder, DOHC, 16 Valves
Displacement:
2351 cc (2.4 Liters)
Bore X Stroke:
86.5 mm x 101.5 mm
Horsepower:
138 hp @ 5500 rpm
Torque:
147 lb-ft @ 4000 rpm
Fuel Delivery:
Multi-Point Fuel Injection (MPI)
Fuel Type:
Unleaded Gasoline
Engine Oil Type:
API SM or ILSAC GF-4, SAE 5W-20
Engine Oil Capacity:
4.6 L (4.9 US qts) with filter change
Coolant Type:
Ethylene Glycol Base, OAT (Organic Acid Technology), Blue Color
Coolant Capacity:
7.6 L (8.0 US qts)
Timing Belt Or Chain:
Timing Belt
Transmission Type Standard:
5-Speed Manual
Transmission Type Optional:
4-Speed Automatic (T4A)
Automatic Transmission Features:
Electronically Controlled, Overdrive
Manual Transmission Fluid:
API GL-4 SAE 75W-90
Automatic Transmission Fluid:
SP-III (Special Kia Specification)
Automatic Transmission Capacity:
6.7 L (7.1 US qts)
NHTSA Front Impact:
4 Stars (Driver), 4 Stars (Passenger)
IIHS Moderate Overlap Front:
Good
Electronic Stability Control:
Optional on some trims
Traction Control:
Standard
Airbags Front:
Dual Front Airbags
Airbags Side:
Optional Front Side Airbags
Airbags Curtain:
Optional Side-Curtain Airbags
Seatbelts:
3-Point Seatbelts with Pretensioners and Load Limiters
Oil And Filter Change:
Every 7,500 miles or 6 months
Engine Air Filter:
Inspect every 15,000 miles, Replace every 30,000 miles
Cabin Air Filter:
Inspect every 15,000 miles, Replace every 30,000 miles
Spark Plugs:
Replace every 105,000 miles (Long-life Iridium type)
Timing Belt:
Replace every 90,000 miles or 7 years
Transmission Fluid Automatic:
Inspect every 30,000 miles, Replace based on severe driving conditions (e.g., 60,000 miles)
Brake Fluid:
Replace every 2 years or 30,000 miles
Engine Oil Consumption:
Some models may exhibit higher-than-average oil consumption, particularly the 2.4L engine. Regular checks and top-ups are recommended.
Suspension Wear:
Front struts and control arm bushings can wear out prematurely, leading to clunking noises and alignment issues.
Cv Joint Boots:
Cracked or torn CV joint boots can lead to premature failure of the CV joints.
Heater Core:
While less common on this generation, earlier Kia models had some issues with heater core leaks. The manual will detail diagnostic procedures.
Power Window Motors:
Occasional failures of power window regulators and motors are reported.
Kia Heritage:
South Korean automotive manufacturer with a history dating back to 1944, initially as a bicycle manufacturer.
Optima Generation 2:
The 2006 Optima represents the second generation (MS platform), launched in 2005 as a 2006 model year. It adopted Kia's new design language and offered improved refinement and technology.
Platform Shared With:
Hyundai Sonata (NF) platform
Production Location:
Hwaseong, Gyeonggi Province, South Korea
Production Years For Ms Platform:
2005 - 2010 (as model years)