HyundaiXG2004Overview/hyundai/xg/2004/base/

2004 Hyundai XG

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2004 XG.

Body PASSENGER CARTransmission Automatic 5-spd

The 2004 Hyundai XG represents Hyundai's entry into the full-size passenger car segment, equipped with a 5-speed automatic transmission and EPA fuel economy ratings of 15/24/18 mpg city/highway/combined. With 91 total owner complaints logged and air bags emerging as the primary concern area alongside one recall on record, this model year sits among the more problematic iterations in the XG's production run—a consideration worth noting for researchers evaluating the vehicle's long-term service history.

Model year20052004200320022001

Quick specs

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

Lug nut torque65-80 ft-lbsOEM · verified
EPA fuel economy15/24/18 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

TransmissionAutomatic 5-spd

Dimensions & weight NHTSA vPIC

Overall length191.3 in
Overall width72 in
Overall height55.9 in
Wheelbase108.3 in
Curb weight3651 lb
Track (front / rear)61.4 / 60.6 in
Weight distribution (front / rear)62/38

Ratings & economy EPA / vPIC

EPA city / highway / combined15 / 24 / 18 mpg
DrivetrainFront-Wheel Drive
Passenger volume103 cu ft
Cargo volume15 cu ft
Recommended fuelRegular Gasoline

Service quick specs OEM factory data

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

Torque lug nuts to 65-80 ft-lbs. The firing order is 1-2-3-4-5-6.

Lubricants & capacities

Automatic Transmission FluidHyundai SP-III
Automatic Transmission Fluid Capacity8.9
Engine CoolantETHYLENE GLYCOL

Chassis torques

Lug Nuts65-80 ft-lbs

Ignition

Cylinder Firing Order1-2-3-4-5-6
Spark Plug ManufacturerNGK
Spark Plug Gap0.037-0.043 in
Spark Plug Torque15.0 ft-lbs

Battery & A/C

RefrigerantR134a
Refrigerant Capacity1.40-1.50 lbs
Oil GroupPAG
Oil Type46
Oil Capacity4.80-5.07 oz

Service checks

Pressure Test21 psi
Radiator Cap Pressure Relief14-18 psi
Thermostat Opening Temperature176-183 °F
Injector Primary Resistance13-16 @ 68 degreesF ohms

Brakes

Torque Caliper to Bracket48-55 ft-lbs / 16-24 ft-lbs
Torque to Knuckle67-82 ft-lbs / 48-55 ft-lbs
Minimum Pad ThicknessFront: 0.079; Rear: 0.079 in
Rotor Max Parallel Variation0.0002 in / 0.0004 in
Rotor Runout Limit0.0012 in
Rotor Nominal Thickness From1.02 in / 0.39 in
Rotor Nominal Thickness To1.02 in / 0.39 in
Rotor Discard at or Under0.961 in / 0.331 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 3,000 mi; spark plugs every 60,000 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.

Every 3,000 miEngine Oil (drain & refill) · Engine Oil Filter (replace)
Every 7,500 miAccessory Drive Belt (inspect) · Axle Shaft Oil Seal (inspect) · CV Joint Boot (inspect) · Tire & Wheel Assembly (rotate)
Every 12,000 miCabin Air Filter (replace)
Every 15,000 miAir Conditioning System (inspect) · Brake Line (inspect) · Brake Linings (inspect) · Brake Rotor (inspect) · Disc Brake Caliper (inspect) · Exhaust System (Complete) (inspect)
Every 30,000 miBrake Drum Assembly (inspect) · Brake Hydraulic System (inspect fluid level) · Engine Air Filter Element (replace) · Engine Coolant System (drain, flush & refill) · Fuel Evaporative Emission Control System Lines (inspect) · Fuel Line (inspect)
Every 52,500 miFuel Evaporative Emission Control System (inspect) · Fuel Filter (inspect) · PCV Hose (inspect) · Vacuum Line (inspect)
Every 60,000 miSpark Plugs (replace) · Timing Belt (replace)
Every 75,000 miDrive Belt (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 federal record for this generation covers only 2000 and 2001, showing minimal complaint volume (one to two per year) with zero recalls or investigations but rising TSB counts from 23 to 31. By contrast, the 2004 model year exhibits a sharp escalation in reported issues, led by 15 air bag complaints, 13 vehicle speed control complaints, seven hydraulic brake complaints, and six suspension complaints. The 2004 data also records 16 crash-related complaints and four fire-related complaints, though the data does not specify root causes or overlap between categories. This places 2004 well outside the low-activity trend documented for the generation's early years, suggesting a significant deterioration in reported reliability. Given the elevated complaint profile across multiple safety-critical systems, the 2004 XG presents a higher-risk purchase than the earlier model years reflected in the federal record.

1
Open recalls
NHTSA campaigns
38
Service bulletins
Manufacturer communications
0
ODI investigations
Office of Defects Investigation
91
Owner complaints
16 involved a crash · 4 a fire
NHTSA crash-test rating federal NCAP · out of 5 stars
Rollover★★★★★

Owner complaints filed with NHTSA, by component

All 91 complaints on record, top 8 components.

Air Bags15
Vehicle Speed Control13
Service Brakes, Hydraulic7
Suspension6
Structure5
Engine & Engine Cooling3
Electrical System3
Suspension,Structure2

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

No recall campaigns on record with NHTSA for this vehicle as of the last data refresh.

Technical service bulletins NHTSA · verified

Showing 5 of 38 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…
25-BD-012H TSB2025-11-05Exterior LightingThis bulletin provides information regarding condensation related to the accumulated…
24-BD-001H2024-02-14VisibilityThis bulletin contains information about the proper removal of the windshield wiper blade…
23-EM-005H2023-10-13Engine And Engine CoolingThis bulletin provides important checkpoint guidelines when performing engine oil and…

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 XG. 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.

Frequently asked

Does the 2004 XG have open recalls?

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

What gas mileage does the XG get?

EPA figures are 15 city / 24 highway / 18 combined mpg.