SubaruLegacy20083.0L/subaru/legacy/2008/3-0l/

2008 Subaru Legacy — 3.0L

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2008 Legacy 3.0L.

Body PASSENGER CAREngine 3.0LTransmission Automatic (S5)

The 2008 Subaru Legacy 3.0L is a passenger car equipped with a 3.0L engine, a five-speed automatic transmission, and a 6-quart oil capacity using 5W-30 API oil, achieving an EPA-estimated 17 mpg city and 24 mpg highway. This model year recorded 65 owner complaints, with air bag issues as the top concern, alongside 9 recalls. Within the Legacy’s complaint history from 1990 to 2025, the 2008 model sits far below the peak of 216 complaints in 1995, reflecting a more refined generation, though it remains above the series low of just 6 complaints for the 2025 model year.

Model year2009200820072004200320022001

Quick specs

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

Engine oil capacity6 qtOEM · verified
Engine oil type5W-30 APIOEM · verified
Lug nut torque74-89 ft-lbsOEM · verified
EPA fuel economy17/24/20 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 · 490 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 · 490 CCAOEM · verified

Full specifications

Engine, drivetrain, dimensions and economy.

Engine & drivetrain NHTSA vPIC

TransmissionAutomatic (S5)

Dimensions & weight NHTSA vPIC

Overall length189 in
Overall width68.9 in
Overall height58.3 in
Wheelbase105.1 in
Curb weight3252 lb
Track (front / rear)58.7 / 58.7 in
Weight distribution (front / rear)57/43

Ratings & economy EPA / vPIC

EPA city / highway / combined17 / 24 / 20 mpg
Drivetrain4-Wheel or All-Wheel Drive
Passenger volume94 cu ft
Cargo volume11 cu ft
Recommended fuelPremium Gasoline

Service quick specs OEM factory data

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

This engine holds 6 qt of 5W-30 API engine oil, DOT 3 brake fluid. Torque lug nuts to 74-89 ft-lbs, the oil drain plug to 33.0 ft-lbs. The firing order is 1-6-3-2-5-4. 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 Capacity10.4
Brake FluidDOT 3
Engine CoolantETHYLENE GLYCOL
Engine Oil5W-30 · API
Engine Oil Capacity6 qt
Manual Transmission Fluid75W-90 · GL-5
Manual Transmission Fluid Capacity7.0-9.0

Engine torques

Connecting Rod (Large End) Bearings39 ft-lbs
Crankshaft Pulley and/or Damper Bolts133 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 Nuts74-89 ft-lbs
Transfer Case Drain Plug17.0-20.0 ft-lbs
Front Wheel Hub162 ft-lbs
Rear Wheel Hub177 ft-lbs

Ignition

Cylinder Firing Order1-3-2-4
Cylinder Firing Order1-6-3-2-5-4
Curb Idle Speed (No Load)MT: 640, AT: 700, TURBO: 750 rpm
Curb Idle Speed Variance (No Load)MT: 110, AT and TURBO: 100 rpm
Spark Plug ManufacturerNGK
Spark Plug Torque15 ft-lbs
Ignition Timing Acceptable VarianceTurbo: 10, Non-Turbo: 8 degrees
Ignition Timing Reference RPMIdle rpm

Battery & A/C

RefrigerantR134a
Refrigerant Capacity.81-.95 lbs
Oil GroupPAG
Oil Type46
Standard BCI Group Number35
Standard BCI Cranking Performance490 cca

Service checks

Pressure Test23 psi
Radiator Cap Pressure Relief14-18 psi
Thermostat Opening Temperature176-183 °F
Injector Primary Resistance5-20 ohms
Engine Compression185-213 psi. 7 variance psi.
Engine Oil Pressure20 psi @ 600 rpm, 73 psi @ 5000
Intake Valve Lash0.0079-0.0080 in
Exhaust Valve Lash0.010-0.0138 in

Brakes

Brake ApplicationWITH SOLID ROTOR / WITH VENTED ROTOR
Torque Caliper to Bracket20 ft-lbs / 27 ft-lbs / 88.5 ft-lbs
Torque to Knuckle39 ft-lbs / 88.5 ft-lbs
OtherSTANDARD WHEELS
Wheel Application17 inch WHEELS
Minimum Pad ThicknessFront: 0.060; Rear: 0.059 in
Brake ApplicationWITH SOLID ROTOR / WITH VENTED ROTOR
Rotor Runout Limit0.002 in

Multi-step torque procedures OEM · verified

Cylinder Head — tightening sequence 9 stages
115 ft. lbs.15 ft. lbs
237 ft. lbs.37 ft. lbs
3Loosen 180 degrees in the reverse order of installing.180 degrees
4Loosen 180 degrees in the reverse order of installing.180 degrees
515 ft. lbs.; Bolts 1-4:15 ft. lbs
635.5 ft. lbs.; Bolts 5-8:35.5 ft. lbs
732.5 ft. lbs.; All Bolts:32.5 ft. lbs
890 degrees.; Bolts 1-4:90 degrees
945 degrees.; Lightly lubricate new cylinder head bolt, threads and flanges with engine oil.45 degrees

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; spark plugs every 60,000 mi.

At 3,000 miEngine Oil (drain & refill) · Engine Oil Filter (replace)
Every 7,500 miEngine Oil (drain & refill) · Engine Oil Filter (replace) · Tire & Wheel Assembly (rotate)
Every 9,300 miCabin Air Filter (replace)
At 15,000 miEngine Oil (drain & refill) · Engine Oil Filter (replace)
Every 15,000 miBrake Line (inspect) · CV Joint Boot (inspect) · Clutch Assembly (inspect) · Driveshaft (inspect) · Parking Brake System (inspect) · Power Steering System (inspect)
Every 30,000 miAccessory Drive Belt (inspect) · Brake Drum Assembly (inspect) · Brake Hydraulic System (drain, refill & bleed) · Brake System (inspect) · Differential (inspect fluid level) · Engine Air Filter Element (replace)
Every 60,000 miSpark Plugs (replace) · Wheel Bearing (inspect)
At 105,000 miTiming 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 2008 Subaru Legacy recorded 65 complaints, 9 recalls, and 203 TSBs with zero federal investigations—a year that sits at the leading edge of an escalating problem trend. Comparing the target year to 2007 (33 complaints) reveals a near-doubling of consumer complaints, while the recall count held steady at 9, and TSBs rose slightly from 199 to 203. The 2008 data foreshadows a clear deterioration pattern: 2009 maintained the elevated complaint level (65) but raised recalls to 13, and 2010 peaked at 150 complaints and 18 recalls—suggesting the Legacy's third generation (2005–2009) harbored persistent issues that the manufacturer was addressing reactively. The dominant complaint area for 2008 is Air Bags at 20 filed complaints, followed by Service Brakes at 9, with an additional 4 complaints referencing the Electrical System in conjunction with Air Bags—indicating a concentration of defect reports around the airbag and electrical subsystems. Notably, 2008 logged 1 fire complaint and 3 crash-related complaints, though the data does not specify root causes. The takeaway is that the 2008 model falls within a rising reliability concern arc that peaked two to three years later, meaning while it avoids the peak complaint/recall years, it still exhibits early signs of systemic issues—particularly in airbag and braking systems—that a buyer should investigate thoroughly via vehicle history and pre-purchase inspection before committing.

9
Open recalls
NHTSA campaigns
203
Service bulletins
Manufacturer communications
0
ODI investigations
Office of Defects Investigation
65
Owner complaints
3 involved a crash · 1 a fire
NHTSA crash-test rating federal NCAP · out of 5 stars
Rollover★★★★

Owner complaints filed with NHTSA, by component

All 65 complaints on record, top 8 components.

Air Bags20
Service Brakes9
Electrical System,Air Bags4
Vehicle Speed Control4
Power Train3
Exterior Lighting3
Visibility/Wiper2
Wheels2

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 2 of 9 campaigns on record for this vehicle.

20V001000Air Bags:Frontal:Passenger Side:Inflator ModuleReported 02/01/2020

Subaru of America, Inc. (Subaru) is recalling certain 2009-2013 Forester, 2003-2006 Baja, 2004-2011 Impreza, 2004-2014 WRX (STI included), 2003-2014 Legacy and Outback, and 2005-2006 Saab 9-2X vehicles originally sold… Remedy: Subaru will notify their owners. General Motors will notify Saab owners. Dealers will replace the passenger air bag inflators with alternate inflators, free of charge. The recall…

20V002000Air Bags:Frontal:Passenger Side:Inflator ModuleReported 02/01/2020

Subaru of America, Inc. (Subaru) is recalling certain 2009-2013 Forester, 2003-2006 Baja, 2004-2011 Impreza, 2004-2014 WRX (including STI), 2003-2014 Legacy and Outback, and 2006 Saab 9-2X vehicles originally sold, or… Remedy: Subaru will notify their owners. General Motors will notify Saab owners. Dealers will replace the passenger air bag inflators, free of charge. The recall began January 7, 2020…

Technical service bulletins NHTSA · verified

Showing 5 of 203 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

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VIN
Decode a VIN to confirm the transmission and build data for a specific Legacy. 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 2008 Legacy 3.0L take?

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

Does the 2008 Legacy have open recalls?

NHTSA lists 9 recall campaign(s) for this model year. Check your specific vehicle by VIN.

What gas mileage does the 3.0L get?

EPA figures are 17 city / 24 highway / 20 combined mpg.