2004 Subaru Legacy Subaru Legacy 2004

We are 103,000+ car owners sharing real-world car information.

Join Us

2004 Subaru Legacy repairs by problem area

Engine (35%)

Transmission and Drivetrain (15%)

Brakes and Traction Control (0%)

Suspension and Steering (13%)

Electrical and Air Conditioning (30%)

Paint, Rust, Leaks, Rattles, and Trim (2%)

Other (6%)

Chart based on 54 repairs.
See TSBs and recalls for the 2004 Subaru Legacy.

2004 Subaru Legacy engine repair cost distribution

$2500+ (12%)

$1000 - $2499 (24%)

$500 - $999 (12%)

$100 - $499 (12%)

< $100 (41%)

Worried about potential repair costs? An extended warranty can provide peace of mind.

Chart based on 17 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.

2004 Subaru Legacy 4dr Wagon

165-horsepower 2.5L H4 5-speed manual AWD

132000 mi

US $2900
Timing belt, clutch, and head gasket 
180000 mi

US $250
P0420 cel light. Changed primary and secondary o2 sensors. Cleaned injectors, maf,throttle body and egr. Cel light still on. 
59000 mi Just got my car back after 30 (THIRTY) days in the shop for intermittent stalling. Unable to solve the problem, covered under warranty. Dealership installed black box data recorder, cold comfort next time it dies in traffic. 
74000 mi

US $1500
Leaking head gaskets, front main seal. 
81000 mi

US $644
Heat shield ears cracked, heat shield cut off entirely 
94000 mi

US $45
Multiple exhaust holes. 
119200 mi

US $1400
Full exhaust replacement 

Return to top

2004 Subaru Legacy 4dr Wagon

165-horsepower 2.5L H4 4-speed shiftable automatic AWD

104160 mi engine light on and cruise not working...garage suspects catalytic converter. sensor seized in place so failed to extract old sensor so no repair completed. 
111220 mi

€500
Finally replaced front O2 sensor at main dealer. Expensive at 400 but CAT seems ok and all lights now off and cruise control and stability system now working as they should. 

Return to top

2004 Subaru Legacy 4dr Wagon

165-horsepower 2.5L H4 4-speed automatic AWD

97000 mi

US $23
Check engine light came on. Went to auto parts store for free OBD II reading. Found to be evaporative emissions problem. Replaced fuel cap, was not the cause of light. 
97500 mi Rechecked tightness of fuel cap and cleaned filler neck surface. Light went out shortly after. 
116200 mi

US $1420
Replaced cat-back exhaust, due to collapse of interior of muffler and corrosion of pipe in front. Leaking coolant from water pump, had been adding coolant for some time. Failure of already replaced part. Replaced engine seals because of oil leak. 

Return to top

2004 Subaru Legacy 4dr Wagon

182280 mi

€1800
Sudden power losses appeared. Often it helped to restart the car - but of course not acceptable. Garage first replaced Lambda sonde, but this did not solve the issue. In the end, a throttle valve (or somethin like that) was replaced. NOTE: in the end the garage searched for free, checking and cleaning all electric contacts which did solve the problem!! Oooofffff, cause I really like this car UPDATE 1/10/2017: The number of power losses reduced, but the problem is not solved yet!! 

Return to top

2004 Subaru Legacy 4dr Sedan

165-horsepower 2.5L H4 4-speed automatic AWD

50000 mi

£100
Uk failed MOT due to exhaust leak 
107000 mi Blown head gasket diagnosed 
107000 mi Blown head gasket 
109900 mi

US $3200
Head gasket blown. Replaced head gasket, drive belt, water pump, head bolts, thermostat, spark plugs, spark plug wires 

Return to top

See TrueDelta's information for all Sedans and Wagons.
See TrueDelta's information for all Subaru models.

2004 Subaru Legacy Engine Problems

See our lemon odds and nada odds page to see vehicles with no repairs or vehicles with more than three repairs. To see how frequently 2004 Subaru Legacy problems occur, check out our car reliability stats.