SubaruForester2003Overview/subaru/forester/2003/base/

2003 Subaru Forester

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

Body PASSENGER CARTransmission Automatic 4-spd

The 2003 Subaru Forester is classified as a passenger car and specifies 4.2 quarts of 5W-30 API engine oil, paired with a four-speed automatic transmission and EPA-rated 19/24/21 mpg. Reliability records show 191 owner complaints, with Fuel System, Gasoline logged as the top complaint area, alongside three recalls. Across the model’s 1998–2026 complaint history—a range whose high is 831 in 2019 and low is 12 in 2026—that 2003 tally sits well below the documented maximum, marking it as a comparatively moderate year whose fuel-system grievances still warrant focused research.

Model year202620252024202320222021202020192003

Quick specs

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

Engine oil capacity4.2 qtOEM · verified
Engine oil type5W-30 APIOEM · verified
Lug nut torque58-72 ft-lbsOEM · verified
EPA fuel economy19/24/21 mpgEPA · verified

Fitment & sizes

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

From the factory this vehicle uses a BCI 35 · 360 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 35 · 360 CCAOEM · verified
Tail / brake / turnLIGHTOEM · verified

Full specifications

Engine, drivetrain, dimensions and economy.

Engine & drivetrain NHTSA vPIC

TransmissionAutomatic 4-spd

Dimensions & weight NHTSA vPIC

Overall length175.2 in
Overall width68.5 in
Overall height62.6 in
Wheelbase99.2 in
Curb weight3053 lb
Track (front / rear)58.3 / 58.7 in
Weight distribution (front / rear)55/45

Ratings & economy EPA / vPIC

EPA city / highway / combined19 / 24 / 21 mpg
Drivetrain4-Wheel or All-Wheel Drive
Passenger volume95 cu ft
Cargo volume31 cu ft
Recommended fuelRegular Gasoline

Performance & power Independent road tests

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

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

9.6–9.8 sec0–60 mph (tested)quickest 9.60 sec — 2003 2.5X
YearTrim / engine0–60¼ mileHPDrivetrain
20032.5X 2.5L F-49.60 sec16.80 sec165 hpAWD
20032.5XS 2.5L F-49.80 sec17.30 sec165 hpAWD
20042.5XT 2.5L Turbo F-45.30 sec13.80 sec210 hpAWD
20062.5XT Limited 2.5L Turbo F-45.90 sec14.30 sec230 hpAWD
20062.5XT Limited 2.5L Turbo F-46.60 sec14.90 sec230 hpAWD

Service quick specs OEM factory data

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

This engine holds 4.2 qt of 5W-30 API engine oil, DOT 3 brake fluid. Torque lug nuts to 58-72 ft-lbs, the oil drain plug to 33.0 ft-lbs. The firing order is 1-3-4-2.

Lubricants & capacities

Brake FluidDOT 3
Engine CoolantETHYLENE GLYCOL
Engine Oil5W-30 · API
Engine Oil Capacity4.2 qt
Power Steering FluidATF
Transfer Case Fluid80W-90 · GL-5
Transfer Case Fluid Capacity3 Pints

Engine torques

Connecting Rod (Large End) Bearings33 ft-lbs
Engine Flywheel Bolts53 ft-lbs
Engine Oil Pan Drain Plug33.0 ft-lbs
Oil Pump to Cylinder BLock Bolts/Studs5 ft-lbs

Chassis torques

Lug Nuts58-72 ft-lbs
Transfer Case Drain Plug17.0-20.0 ft-lbs
Front Wheel Hub140 ft-lbs
Rear Wheel Hub140 ft-lbs

Ignition

Cylinder Firing Order1-3-4-2
Curb Idle Speed (No Load)MT: 650, AT: 700 rpm
Curb Idle Speed Variance (No Load)100 rpm
Ignition Coil Primary Resistance.66-.80 ohms
Ignition Coil Secondary Resistance10,880-14,720 ohms
Spark Plug ManufacturerChampion
Spark Plug Gap0.039-0.043 in
Spark Plug Torque13-17 ft-lbs

Battery & A/C

RefrigerantR134a
Refrigerant Capacity1.30-1.43 lbs
Oil GroupPAG
Oil Capacity5.20 oz
Standard BCI Group Number35
Standard BCI Cranking Performance360 cca

Service checks

Injector Primary Resistance5-20 ohms
Engine Compression148-185 psi
Engine Oil Pressure14 psi @ 600 rpm, 43 psi @ 5000
Intake Valve LashSOHC: 0.008, DOHC: 0.079 in
Exhaust Valve LashSOHC: 0.010, DOHC: 0.118-0.158 in

Brakes

Brake ApplicationWITH REAR DISC
Torque Caliper to Bracket38.3 ft-lbs / 27.5 ft-lbs
Torque to Knuckle59 ft-lbs
Minimum Pad ThicknessFront: 0.295; Rear: 0.256 specification
Brake ApplicationWITH REAR DISC
Rotor Runout Limit0.0028 in / 0.003 in
Rotor Nominal Thickness From0.394 in / 0.944 in
Rotor Nominal Thickness To0.394 in / 0.944 in

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; 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 7,500 miCabin Air Filter (replace) · Engine Oil (drain & refill) · Engine Oil Filter (replace) · Tire & Wheel Assembly (inspect)
Every 15,000 miAxle Shaft Oil Seal (inspect) · Brake Line (inspect) · CV Joint Boot (inspect) · Clutch Assembly (inspect) · Parking Brake System (inspect) · Power Steering System (inspect)
Every 30,000 miBrake Drum Assembly (inspect) · Brake Hydraulic System (drain, refill & bleed) · Brake Linings (inspect) · Differential (inspect fluid level) · Engine Air Filter Element (replace) · Engine Coolant System (leak inspection)
At 105,000 miAccessory Drive Belt (inspect) · Drive Belt (replace) · Timing 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 2003 model year records 191 complaints and 3 recalls, representing a sharp rise from the 2002 model's 93 complaints and 1 recall. This places the 2003 Forester at the upper end of the 1998-2008 period's federal record, exceeded only by the 2004 model's 219 complaints before figures declined in 2005. Technical Service Bulletins for this year total 143, continuing a consistent upward trend from 30 in 1998, while top complaint areas focus on Fuel System, Gasoline with 26 reports and Engine & Engine Cooling with 16. Although fire complaints are zero, there are 17 crash complaints and one open investigation, indicating higher federal attention than the 2000-2002 period where investigations were zero. Given that this year peaks in complaints before a subsequent drop in 2005, it carries more documented risk than adjacent model years. Consequently, the 2003 model is not the recommended choice within this era given its higher complaint volume relative to surrounding years.

3
Open recalls
NHTSA campaigns
143
Service bulletins
Manufacturer communications
1
ODI investigations
Office of Defects Investigation
191
Owner complaints
17 involved a crash · 0 a fire
NHTSA crash-test rating federal NCAP · out of 5 stars
Rollover★★★★★

Owner complaints filed with NHTSA, by component

All 191 complaints on record, top 8 components.

Fuel System, Gasoline26
Fuel/Propulsion System20
Engine & Engine Cooling16
Suspension14
Air Bags14
Vehicle Speed Control12
Structure10
Power Train8

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 2 of 3 campaigns on record for this vehicle.

11V464000Suspension:Front:Control Arm:Lower ArmReported 06/09/2011

SUBARU IS RECALLING CERTAIN MODEL YEAR 2002-2007 IMPREZA, MODEL YEAR 2003-2008 FORESTER, AND MODEL YEAR 2005-2006 SAAB 9-2X VEHICLES MANUFACTURED FROM SEPTEMBER 5, 2000 THROUGH NOVEMBER 26, 2007 ORIGINALLY SOLD, OR… Remedy: SUBARU WILL HANDLE THEIR VEHICLES AND SAAB WILL HANDLE THEIRS. DEALERS WILL INSPECT THE DEGREE OF CORROSION OF THE FRONT LOWER CONTROL ARMS, AND WILL EITHER RUSTPROOF OR REPLACE…

02V282000Power Train:Automatic TransmissionReported 30/10/2002

CERTAIN SPORT UTILITY AND PASSENGER VEHICLES EQUIPPED WITH AUTOMATIC TRANSMISSIONS WERE PRODUCED WITH AN IMPROPERLY MANUFACTURED TRANSMISSION PARKING ROD. WHEN THE TRANSMISSION SELECTOR LEVER IS PLACED IN THE "P" (PARK)… Remedy: DEALERS WILL REPLACE THE AUTOMATIC TRANSMISSION PARKING ROD ASSEMBLY. OWNER NOTIFICATION JANUARY 8, 2003. AN INTERIM OWNER NOTIFICATION WILL BE SENT DURING NOVEMBER 2002. OWNERS…

Technical service bulletins NHTSA · verified

Showing 5 of 143 bulletins on record with NHTSA.

BulletinDateComponentSummary
SubaruNet Annoucement (E2026-06-11Unknown Or OtherThis announcement is requesting retailer staff to retain the EyeSight protective hood…
01-167-08R2026-05-18Unknown Or OtherThis bulletin contains additional information for recommended materials listed in the…
SubaruNet Announcement (R2026-05-04Power TrainThis announcement provides information on the remanufactured CVT transmission program.
07-240-26R2026-04-30Unknown Or OtherThis Service Information Bulletin was developed to provide interim guidance for vehicles…
03-97-262026-04-24Power TrainThis bulletin announces the service manual correction regarding clutch master cylinder…

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 Forester. 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 2003 Forester take?

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

Does the 2003 Forester have open recalls?

NHTSA lists 3 recall campaign(s) for this model year. Check your specific vehicle by VIN.

What gas mileage does the Forester get?

EPA figures are 19 city / 24 highway / 21 combined mpg.