SubaruImpreza19982.5L/subaru/impreza/1998/2-5l/

1998 Subaru Impreza — 2.5L

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1998 Impreza 2.5L. Covers both the standard and High Output 2.5L.

Engine 2.5LTransmission Automatic 4-spd

The 1998 Subaru Impreza 2.5L features a 2.5L engine and a 4-speed automatic transmission, yielding an EPA fuel economy rating of 19/25/21 mpg. Maintenance for this powertrain requires 4.8 quarts of 5W-30 API engine oil. Within the model's 1990-2026 history, this year recorded 46 owner complaints—primarily regarding the suspension—and two recalls, placing it between the 2002 peak of 300 complaints and the 2026 low of one.

Model year2001200019991998

Quick specs

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

Engine oil capacity4.8 qtOEM · verified
Engine oil type5W-30 APIOEM · verified
Lug nut torque58-72 ft-lbsOEM · verified
EPA fuel economy19/25/21 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 length172.4 in
Overall width67.3 in
Overall height55.5 in
Wheelbase99.2 in
Curb weight2824 lb
Track (front / rear)57.5 / 57.5 in

Ratings & economy EPA / vPIC

EPA city / highway / combined19 / 25 / 21 mpg
Drivetrain4-Wheel or All-Wheel Drive
Passenger volume84 cu ft
Cargo volume11 cu ft
Recommended fuelRegular Gasoline

Performance & power Independent road tests

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

Independent published road-test results.

8.3 sec0–60 mph (tested)quickest 8.30 sec — 1998 2.5RS Coupe
165 hpHorsepower (as tested)
162 lb-ftTorque (as tested)
YearTrim / engine0–60¼ mileHPDrivetrain
19982.5RS Coupe 2.5L F-48.30 sec16.40 sec165 hpAWD
20002.5RS Sedan 2.5L F-47.80 sec15.90 sec165 hpAWD

Service quick specs OEM factory data

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

This engine holds 4.8 qt of 5W-30 API engine oil, 75W-90 · 80W-90 · GL-5 in the differential, DOT 3 brake fluid. Torque lug nuts to 58-72 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

Brake FluidDOT 3
Differential Gear Oil75W-90 · 80W-90 · GL-5
Differential Gear Oil Capacity1.6 Pints
Engine CoolantETHYLENE GLYCOL
Engine Oil5W-30 · API
Engine Oil Capacity4.8 qt
Power Steering FluidATF
Transfer Case Fluid80W-90 · GL-5

Engine torques

Connecting Rod (Large End) Bearings33 ft-lbs
Crankshaft Pulley and/or Damper Bolts123-137 ft-lbs
Engine Flywheel Bolts53 ft-lbs
Intake Manifold to Engine Bolts18.1 ft-lbs
Exhaust Manifold to Cylinder Head Bolts22.4 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 Hub137 ft-lbs
Rear Wheel Hub137 ft-lbs

Ignition

Cylinder Firing Order1-3-4-2
Curb Idle Speed (No Load)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 Capacity0.99-1.50 lbs
Oil GroupPAG
Oil Capacity4.90 oz
Standard BCI Group Number35
Standard BCI Cranking Performance360 cca

Service checks

Pressure Test23 psi
Radiator Cap Pressure Relief11-15 psi
Thermostat Opening Temperature169-176 °F
Injector Primary Resistance5-20 ohms
Engine Compression137-176 psi
Engine Oil Pressure14 psi @ 600-700 rpm, 43 psi @ 5000 rpm psi
Intake Valve Lash0.008 in
Exhaust Valve Lash0.010 in

Brakes

Brake ApplicationWITH REAR DISC / WITH STANDARD
Torque Caliper to Bracket58 ft-lbs / 24-31 ft-lbs
Torque to Knuckle58 ft-lbs
Minimum Pad ThicknessFront: 0.295; Rear: 0.256 specification
Brake ApplicationWITH REAR DISC / WITH STANDARD
Rotor Runout Limit0.0029 in / 0.0028 in
Rotor Nominal Thickness From0.394 in / 0.945 in
Rotor Nominal Thickness To0.394 in / 0.945 in

Multi-step torque procedures OEM · verified

Cylinder Head — tightening sequence 8 stages
122 ft. lbs.22 ft. lbs
251 ft. lbs.51 ft. lbs
3Loosen 180 degrees.180 degrees
4Loosen 180 degrees.180 degrees
5Bolts 1-225 ft. lbs
6Bolts 3-611 ft. lbs
780-90 degrees.80–90 degrees
880-90 degrees.80–90 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.

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)
At 15,000 miEngine Oil (drain & refill) · Engine Oil Filter (replace)
Every 15,000 miBody Latches, Locks & Hinges (inspect) · Brake System (inspect) · Clutch Assembly (inspect) · Clutch Master Cylinder (inspect fluid level) · Engine Coolant System (leak inspection) · Hill Holder System (inspect)
Every 30,000 miBrake Drum Assembly (inspect) · Brake Hydraulic System (drain, refill & bleed) · Differential (inspect fluid level) · Engine Air Filter Element (replace) · Engine Breather Filter (replace) · Fuel Filter (replace)
Every 60,000 miWheel Bearing (inspect)
At 105,000 miAccessory Drive Belt (inspect) · Drive Belt (replace) · Engine Valves (inspect valve lash)

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 1998 Subaru Impreza recorded 46 complaints, 2 recalls, and 24 TSBs, placing it in a period of moderate complaint activity within the model's generational arc. This represents an uptick from 1997 (34 complaints) but precedes a significant drop in 1999 (22 complaints), suggesting 1998 may have been a model year that experienced specific issues that did not persist into the next. Notably, 1998 had fewer recalls than both surrounding years (2 vs. 3 in both 1997 and 1999), and the TSB count was at its lowest point in the late 1990s before climbing steadily from 1999 onward. The complaint trend across the generation shows a relatively calm period in the late 1990s followed by a dramatic spike in 2002 (300 complaints, 4 investigations), indicating that major reliability concerns emerged later in the platform's lifecycle. The top complaint areas—Suspension (13), Power Train (10), and Engine & Engine Cooling (6)—suggest structural and drivetrain concerns, with one crash complaint recorded and zero fire complaints. Given that 1998 falls in a relatively stable pocket before the significant escalation of issues in the early 2000s, it represents a reasonably safe purchase within this generation, though prospective buyers should verify suspension and drivetrain component condition given the complaint patterns.

2
Open recalls
NHTSA campaigns
24
Service bulletins
Manufacturer communications
0
ODI investigations
Office of Defects Investigation
46
Owner complaints
1 involved a crash · 0 a fire

Owner complaints filed with NHTSA, by component

All 46 complaints on record, top 8 components.

Suspension13
Power Train10
Engine & Engine Cooling6
Unknown Or Other3
Air Bags2
Electrical System2
Wheels,Unknown Or Other1
Engine & Engine Cooling,Power Train1

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 2 of 3 campaigns on record for this vehicle.

08E050000Exterior Lighting:HeadlightsReported 11/08/2008

K2 MOTOR IS RECALLING 1,921 AFTERMARKET HEADLAMPS OF VARIOUS MODELS SOLD FOR USE ON THE ABOVE LISTED VEHICLES. THESE HEADLAMPS ARE MISSING THE AMBER SIDE REFLEX REFLECTOR WHICH FAILS TO CONFORM WITH THE REQUIREMENTS OF… Remedy: K2 MOTOR WILL NOTIFY OWNERS AND OFFER A FULL REFUND. THE RECALL BEGAN ON DECEMEBER 17, 2008. OWNERS MAY CONTACT K2 MOTOR AT 1-909-839-2992.

09E012000Exterior LightingReported 07/04/2009

SABERSPORT IS RECALLING 16,270 COMBINATION CORNER AND BUMPER LAMP ASSEMBLIES OF VARIOUS PART NUMBERS SOLD FOR USE AS AFTERMARKET EQUIPMENT FOR VARIOUS PASSENGER VEHICLES. THESE HEADLAMPS FAIL TO CONFORM TO THE… Remedy: SABERSPORT WILL NOTIFY OWNERS AND OFFER A FULL REFUND FOR THE NONCOMPLIANT COMBINATION LAMPS. THE SAFETY RECALL BEGAN ON MAY 11, 2009. OWNERS MAY CONTACT SABERSPORT AT…

Technical service bulletins NHTSA · verified

Showing 5 of 24 bulletins on record with NHTSA.

BulletinDateComponentSummary
12-249-23R2023-07-11EquipmentThis bulletin announces the recommended cleaning procedures to followed when encountering…
15-302-222022-08-23EquipmentThis bulletin contains illustrations of exchange components and their manufacturer as…
01-167-08R2022-08-23EquipmentThis bulletin contains additional information for recommended materials listed in the…
15-192-22R2022-03-18Electrical SystemThis bulletin has been developed to outline the steps for gathering basic essential…
01-167-08R2021-06-17Electrical SystemThis bulletin contains additional information for recommended materials listed in the…

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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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 1998 Impreza 2.5L take?

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

Does the 1998 Impreza have open recalls?

NHTSA lists 2 recall campaign(s) for this model year. Check your specific vehicle by VIN.

What gas mileage does the 2.5L get?

EPA figures are 19 city / 25 highway / 21 combined mpg.