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2003 Kia Sorento

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2003 Sorento.

Body SUVTransmission Automatic 4-spd

The 2003 Kia Sorento debuted as a body-on-frame SUV backed by a four-speed automatic and rated at 14 city, 18 highway and 15 combined mpg. Owner reports for the inaugural year tallied 308 complaints, with Engine & Engine Cooling topping the list and a single recall recorded. Across the Sorento's full 2003–2026 complaint history, the 2003 model sits well below the peak of 1,516 complaints seen in 2011 yet far above the low of three in 2010, marking the debut year as a moderately troubled but not exceptional entry in the nameplate's reliability arc.

Model year2026 2025 2024 2023 2022 2021 2020 2019 2003

Quick specs

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

Lug nut torque65-87 ft-lbsOEM · verified

EPA fuel economy14/18/15 mpgEPA · verified

Fitment & sizes

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

Tail / brake / turnLAMPOEM · verified

Full specifications

Engine, drivetrain, dimensions and economy.

Engine & drivetrain NHTSA vPIC

Transmission

Automatic 4-spd

Dimensions & weight NHTSA vPIC

Overall length	179.9 in
Overall width	73.2 in
Overall height	71.3 in
Wheelbase	107.1 in
Curb weight	4255 lb
Track (front / rear)	61.8 / 62.2 in
Weight distribution (front / rear)	56/44

Ratings & economy EPA / vPIC

EPA city / highway / combined	14 / 18 / 15 mpg
Drivetrain	Rear-Wheel Drive
Recommended fuel	Regular Gasoline

Performance & power Independent road tests

0–60 mph, quarter-mile, horsepower and torque from independent road tests.

Independent road tests for the Sorento of this era, listed by trim and engine — this page spans more than one engine, so no single horsepower figure is shown.

9.1–9.5 sec0–60 mph (tested)quickest 9.10 sec — 2003 EX V6

Year	Trim / engine	0–60	¼ mile	HP	Drivetrain
2003	EX V6 3.5L V6	9.10 sec	17.00 sec	192 hp	4x4
2003	EX V6 3.5L V6	9.50 sec	17.30 sec	192 hp	4x4
2004	EX V6 3.5L V6	9.40 sec	16.96 sec	192 hp	4x4

Service quick specs OEM factory data

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

Torque lug nuts to 65-87 ft-lbs, the oil drain plug to 29.0 ft-lbs. The firing order is 1-2-3-4-5-6.

Lubricants & capacities

Engine Coolant

ETHYLENE GLYCOL

Engine torques

Crankshaft Pulley and/or Damper Bolts	130-138 ft-lbs
Engine Oil Pan Drain Plug	29.0 ft-lbs

Chassis torques

Lug Nuts	65-87 ft-lbs
Transfer Case Fill Plug	22.0 ft-lbs
Transfer Case Drain Plug	22.0 ft-lbs

Ignition

Cylinder Firing Order	1-2-3-4-5-6
Curb Idle Speed (No Load)	700 rpm
Curb Idle Speed Variance (No Load)	100 rpm
Spark Plug Gap	0.039-0.0.043 in
Spark Plug Torque	15.0-21.0 ft-lbs
Ignition Timing	10, Not adjustable degrees
Ignition Timing Acceptable Variance	2 degrees

Battery & A/C

Refrigerant	R134a
Refrigerant Capacity	1.26-1.38 lbs
Oil Group	PAG
Oil Type	46
Oil Capacity	4.72-5.40 oz

Service checks

Pressure Test	22 psi
Radiator Cap Pressure Relief	14-18 psi
Thermostat Opening Temperature	176-183 °F
Regulated Fuel System Pressure (Without Vacuum)	39.0 psi
Regulated Fuel System Pressure (With Vacuum)	46.0-50.0 psi
Engine Compression	164-185 PSI. 14 Maximum variation PSI.
Engine Oil Pressure	18.77 psi
Engine Oil Pressure RPM	1000 rpm

Brakes

Torque Caliper to Bracket	16-24 ft-lbs / 16-23 ft-lbs
Torque to Knuckle	47-54 ft-lbs
Minimum Pad Thickness	Front: 0.030; Rear: 0.030 specification
Rotor Runout Limit	0.0012 in
Rotor Nominal Thickness From	1.102 in / 0.787 in
Rotor Nominal Thickness To	1.102 in / 0.787 in
Rotor Discard at or Under	1.024 in / 0.724 in

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the engine oil and filter every 7,500 mi; spark plugs every 60,000 mi.

Every 7,500 mi	Body Latches, Locks & Hinges (lubricate) · Differential (inspect fluid level) · Engine Oil (drain & refill) · Engine Oil Filter (replace) · Tire & Wheel Assembly (rotate) · Transfer Case Assembly (inspect fluid level)
Every 15,000 mi	Brake Line (inspect) · Brake Rotor (inspect) · CV Joint Boot (inspect) · Driveshaft U-Joint (lubricate) · Engine Coolant System Hoses (inspect) · Transmission Assembly (inspect fluid level)
Every 22,500 mi	Drive Axle Assembly (drain & refill)
Every 30,000 mi	Accessory Drive Belt (inspect) · Body Fasteners (inspect) · Engine Air Filter Element (replace) · Engine Coolant System (leak inspection) · Exhaust System Heat Shield (inspect) · Fuel Evaporative Emission Control System Lines (inspect)
Every 60,000 mi	Spark Plug Wires (inspect) · Spark Plugs (replace)

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 2003 Kia Sorento recorded 308 complaints, 1 recall, 1 investigation, and 30 TSBs. Within the initial generation (2003–2010), the 2003 model sits at the high end of complaint volume, exceeding the 220 complaints seen in 2004 and nearly matching the 307 reported in 2005. Primary complaint areas for 2003 include Engine & Engine Cooling (56), Fuel System, Gasoline (33), and Fuel/Propulsion System (28), although the data does not specify the root causes for these issues. The record for this year also includes 10 crash-related complaints and 3 fire-related complaints. While recalls and investigations were low in 2003, they trended upward toward the end of the generation in 2007 and 2008. Because it represents one of the highest complaint volumes of the first generation, this is not a recommended year to buy.

Open recalls

NHTSA campaigns

Service bulletins

Manufacturer communications

ODI investigations

Office of Defects Investigation

308

Owner complaints

10 involved a crash · 3 a fire

NHTSA crash-test rating federal NCAP · out of 5 stars

Rollover★★★★★

Owner complaints by model year NHTSA · this generation & adjacent

’03’04 ’05 ’06 ’07 ’08 ’09 ’10 ’11 ’12 ’13 ’14 ’15 ’16 ’17 ’18 ’19 ’20 ’22 ’23 ’24 ’25 ’26

Owner complaints filed with NHTSA, by component

All 308 complaints on record, top 8 components.

Engine & Engine Cooling56

Fuel System, Gasoline33

Fuel/Propulsion System28

Engine24

Air Bags19

Service Brakes, Hydraulic13

Steering12

Power Train11

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 1 of 1 campaigns on record for this vehicle.

05V353000Fuel System, Gasoline:Delivery:Hoses, Lines/Piping, And FittingsReported 04/08/2005

CERTAIN SPORT UTILITY VEHICLES MAY EXPERIENCE A FUEL LEAK FROM FUEL TUBES NEAR THE FUEL TANK DUE TO AN INTERFERENCE FIT WITH THE VEHICLE FLOOR PANEL. Remedy: DEALERS WILL REPLACE A SECTION OF THE FUEL LINE. THE RECALL BEGAN ON OCTOBER 10, 2005. OWNERS MAY CONTACT KIA AT 1-800-333-4542.

Technical service bulletins NHTSA · verified

Showing 5 of 30 bulletins on record with NHTSA.

Bulletin	Date	Component	Summary
TSB_BOD055_R1	2021-09-13	Structure	TECHNICAL SERVICE BULLETIN: INFORMATION FOR HEADLAMP CONDENSATION AND MOISTURE - This…
PS539	2018-03-02	Engine And Engine Cooling	PITSTOP - ENGINE COMPONENT RE-USE GUIDELINES - In general, parts and components removed…
TSB-GEN085R1	2017-01-18	Equipment	TSB: MANDATORY REPLACEMENT OF LOCKING/SECURITY HARDWARE - By design, certain fasteners…
TSB-GEN085	2016-11-04	Latches/Locks/Linkages	TSB: MANDATORY REPLACEMENT OF LOCKING/SECURITY HARDWARE - By design, certain fasteners…
PS443	2016-04-04	Electrical System	TSB - USE OF AFTERMARKET USB CHARGING CABLES IN USB/12V PORTS - This article provides…

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 Sorento. 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.

Reference guides

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

Vehicle recalls & TSBs OBD-II trouble codes Maintenance schedules Fluid capacities & specs

Frequently asked

Does the 2003 Sorento have open recalls?

NHTSA lists 1 recall campaign(s) for this model year. Check your specific vehicle by VIN.

What gas mileage does the Sorento get?

EPA figures are 14 city / 18 highway / 15 combined mpg.