SaturnIon2004Overview/saturn/ion/2004/base/

2004 Saturn Ion

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

Body PASSENGER CAR

The 2004 Saturn Ion, a compact passenger car built on Saturn’s C-platform, pairs a modest yet reliable powertrain with a practical 5‑quartet oil capacity that recommends 5W‑30 API viscosity, ensuring smooth operation across its modest power range. In the broader context of its 2003‑2008 complaint cycle, this model sits toward the lower end of the reliability spectrum, recording only 898 owner complaints—significantly fewer than the 1,235 complaints the 2006 model year attracted—yet it still ranks in the top complaint area for steering, a reminder of the Ion’s mixed durability record despite its 10 recalls.

Model year20072006200520042003

Quick specs

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

Engine oil capacity5 qtOEM · verified
Engine oil type5W-30 APIOEM · verified
Lug nut torque100 ft-lbsOEM · verified

Fitment & sizes

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

From the factory this vehicle uses a BCI 78 · 600 CCA battery, OE oil filter 12580255. Note the factory fuel filter is now discontinued — plan on a superseded or quality aftermarket equivalent, which the part pages below list where known. 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 78 · 600 CCAOEM · verified

OE service part numbers OEM · verified

Engine oil filter12580255 alt 12605566
Engine air filter19239713 alt 22679620
Fuel filter22734980 discontinued
Spark plug12680075 alt 12681663
Front wiper blades20918023 alt 15245111
Serpentine belt12634322 alt 12585151
Thermostat03522676 alt 12622410
Cabin air filter52493319

Full specifications

Engine, drivetrain, dimensions and economy.

Dimensions & weight NHTSA vPIC

Overall length185 in
Overall width68.1 in
Overall height55.9 in
Wheelbase103.1 in
Curb weight2751 lb
Track (front / rear)58.7 / 58.3 in
Weight distribution (front / rear)60/40

Service quick specs OEM factory data

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

This engine holds 5 qt of 5W-30 API engine oil, DOT 3 brake fluid. Torque lug nuts to 100 ft-lbs, the oil drain plug to 18.0 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 Capacity4.2
Brake FluidDOT 3
Engine Oil5W-30 · API
Engine Oil Capacity5 qt
Engine Oil5W-30 · API
Engine Oil Capacity5 qt
Manual Transmission FluidGM part number 88861800

Engine torques

Intake Manifold to Engine Bolts16 ft-lbs
Exhaust Manifold to Cylinder Head Bolts9 ft-lbs
Intake Manifold to Engine Bolts7.4 ft-lbs
Exhaust Manifold to Cylinder Head Bolts13 ft-lbs
Engine Oil Pan Drain Plug18.0 ft-lbs
Engine Oil Pan Drain Plug18.0 ft-lbs

Chassis torques

Lug Nuts100 ft-lbs
Front Wheel Hub155 ft-lbs

Ignition

Cylinder Firing Order1-3-4-2
Spark Plug ManufacturerAC Delco
Spark Plug Gap0.040 in
Spark Plug Torque20.0 ft-lbs
Spark Plug ManufacturerAC Delco
Spark Plug Gap0.040 in
Spark Plug Torque18.0-22.0 ft-lbs

Battery & A/C

RefrigerantR134a
Refrigerant Capacity.90 lbs
Oil GroupPAG
Oil Type46
Oil Capacity5.00 oz
Standard BCI Group Number78
Standard BCI Cranking Performance600 cca
Standard BCI Group Number75

Service checks

Injector Primary Resistance11-14 na ohms
Injector Primary Resistance11-14 na ohms
Engine Oil Pressure65 psi
Engine Oil Pressure RPM1000 rpm
Engine Oil Pressure30-70 psi

Brakes

Brake ApplicationWITH RPO J41, JM4 / WITH RPO JL9
Torque Caliper to Bracket25 ft-lbs
Torque to Knuckle85 ft-lbs
Minimum Pad Thickness0.039 in
Minimum Shoe Thickness0.020 in
Brake ApplicationWITH RPO J41, JM4 / WITH RPO JL9
Rotor Max Parallel Variation0.001 in
Rotor Runout Limit0.002 in

Multi-step torque procedures OEM · verified

Crankshaft Pulley and/or Damper Bolts — tightening sequence 1 stages
174 ft. lbs., step 2: 7574 ft. lbs
Crankshaft Pulley and/or Damper Bolts — tightening sequence 1 stages
174 ft. lbs., step 2: 12574 ft. lbs
Cylinder Head — tightening sequence 2 stages
122 ft. lbs.22 ft. lbs
2155 degrees.155 degrees
Cylinder Head — tightening sequence 2 stages
122 ft. lbs.22 ft. lbs
2155 degrees.155 degrees

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the spark plugs every 100,000 mi; coolant at 150,000 mi. The big-interval services (at 150,000 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 25,000 miAccessory Drive Belt (inspect) · Engine Air Filter Element (replace) · Exhaust System (Complete) (inspect) · Fuel System (inspect)
Every 50,000 miDrive Belt (replace) · Transmission Assembly (add fluid conditioner)
Every 100,000 miFuel Filter (replace) · Spark Plugs (replace)
At 150,000 miEngine Coolant System (drain, flush & refill)

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 2004 model year registers 898 complaints and 10 recalls—marking increases from 2003’s 766 complaints and 7 recalls, and representing the generational peak for recall campaigns that would drop to 5 in 2005 and fluctuate through 2007 before ending at zero in 2008. Positioned early in the model run, 2004 precedes the 2006 complaint spike to 1,235 filings and the subsequent decline, suggesting this year captured initial defect accumulation rather than the most troubled production phase. Federal data identifies steering and electrical systems as the dominant complaint categories at 281 and 234 instances respectively, though specific failure modes are unspecified, while 51 crash-related and 4 fire-related complaints provide additional severity context. Given that 2004 combines the generation’s highest recall count with complaint volumes exceeding the 2005 trough and approaching the 2007 level, it presents higher exposure than later model years, making it a cautious choice rather than an optimal purchase.

10
Open recalls
NHTSA campaigns
525
Service bulletins
Manufacturer communications
4
ODI investigations
Office of Defects Investigation
898
Owner complaints
51 involved a crash · 4 a fire
NHTSA crash-test rating federal NCAP · out of 5 stars
Rollover★★★★
Owner complaints by model year NHTSA · this generation & adjacent

Owner complaints filed with NHTSA, by component

All 898 complaints on record, top 8 components.

Steering281
Electrical System234
Power Train40
Fuel/Propulsion System30
Steering,Electrical System25
Engine & Engine Cooling22
Air Bags19
Electrical System,Air Bags16

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 2 of 10 campaigns on record for this vehicle.

14V171000Electrical System:IgnitionReported 10/04/2014

General Motors LLC (GM) is recalling certain model year 2005-2010 Chevrolet Cobalt, 2006-2011 Chevrolet HHR, 2007-2010 Pontiac G5, 2006-2010 Pontiac Solstice, 2003-2007 Saturn Ion, and 2007-2010 Saturn Sky vehicles. In… Remedy: General Motors will notify owners, and for vehicles that were built with the defective ignition cylinder and have not previously had the ignition cylinder replaced with the…

14V153000Steering:Electric Power Assist SystemReported 31/03/2014

General Motors LLC (GM) is recalling certain model year 2004-2006 and 2008-2009 Chevrolet Malibu, 2004-2006 Malibu Maxx, 2009-2010 HHR (non-turbo), 2010 Cobalt, 2008-2009 Saturn Aura and 2004-2007 Ion, and 2005-2009… Remedy: GM will notify owners, and dealers will perform one of four bulletins. Parts are not currently available. GM expects to send an interim notification around May 28, 2014. When…

Technical service bulletins NHTSA · verified

Showing 5 of 525 bulletins on record with NHTSA.

BulletinDateComponentSummary
PIP5601C2025-07-18Unknown Or OtherThis PI communicates the requirement to provide a pico file to receive diagnostic…
PIP5358D2025-02-19Unknown Or OtherThis Preliminary Information communication provides information to the technician about…
PIP4723J2024-10-25Electrical SystemThis Preliminary Information communicates to the dealer the process for downloading or…
PIT5099H2024-09-12Unknown Or OtherThis Preliminary Information communication provides information to the technician about…
PIT5099H2024-09-12Unknown Or OtherThis Preliminary Information communication provides information to the technician about…

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 Ion. 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 2004 Ion take?

5 qt of 5W-30 API, per the factory manual.

Does the 2004 Ion have open recalls?

NHTSA lists 10 recall campaign(s) for this model year. Check your specific vehicle by VIN.