The Subaru WRX and STI maintenance schedule depends on the chassis, engine, transmission, model year, and how the car is driven. A 2015-2021 VA WRX with the FA20DIT does not have the same needs as a 2015-2021 VA STI with the EJ257, and neither follows the same plan as a 2022+ VB WRX with the FA24DIT.
Use the Subaru WRX engine guide to identify the engine family before selecting a service schedule or ordering maintenance parts.
Quick answer: change the engine oil and filter at the factory interval for your exact model year, inspect the car at the interval in that schedule, rotate and inspect the tires regularly, replace brake fluid on schedule, and plan timing-belt and drivetrain service on EJ-powered WRX and STI models. The STI also needs attention to its six-speed drivetrain, DCCD system, Brembo brakes, and repeated hard use. Modified, tracked, short-trip, dusty, or heavily spirited cars should be serviced more often.
If you are deciding whether a used WRX or STI is a sensible purchase, pair this service baseline with the used Subaru WRX buying guide for the records, modification, test-drive, and pre-purchase inspection process.
For the problems that maintenance records and inspections are meant to uncover, see Subaru WRX common problems by generation and year. This schedule owns service timing; the common-problems guide owns the chassis-specific failure overview.
This is a planning guide, not a replacement for the maintenance booklet that came with your car. Subaru’s official schedules vary by model year, and the owner’s manual takes priority if it differs from a general interval below. Subaru’s current owner-resource pages provide the correct manual and warranty/maintenance booklet by vehicle. Start with Subaru’s official vehicle resources, then select your model year and trim.
On this page
- WRX maintenance schedule at a glance
- 2015-2021 VA WRX maintenance schedule
- 2022+ VB WRX maintenance schedule
- 2002-2014 EJ WRX maintenance schedule
- 2004-2021 WRX STI maintenance schedule
- Extra maintenance for modified WRXs and STIs
- What to do after buying a used WRX or STI
- WRX and STI Maintenance FAQ
- Final checklist
- Sources and further reading
WRX maintenance schedule at a glance
The table below is a practical baseline for normally driven later VA and VB WRXs. The older EJ WRX schedule appears below. Use the shorter interval when time and mileage do not match, and confirm the exact requirement for your model year before buying fluid or parts.
| Service | Normal baseline | Shorten the interval when… |
|---|---|---|
| Engine oil and filter | Follow the exact booklet; many later schedules use 6 months or 6,000 miles | The car sees track use, repeated short trips, hard driving, high heat, or tuning changes |
| Tire rotation and inspection | About every 6,000-12,000 miles | Tread wear is uneven, the car is lowered, or alignment has changed |
| Brake and clutch fluid | 2016 VA example: 24,000 miles or 24 months; 2019-2021 VA examples: 30,000 miles or 24 months | The pedal feels soft, the fluid is dark, the car sees wet climates, or it is used on track |
| Engine air filter | Inspect at routine services; replace when dirty or at the model-year interval | The car is driven in dust, construction areas, or winter salt and debris |
| Transmission and differential fluids | 2016 VA example: inspect at 48,000 miles; 2019-2021 VA examples: inspect at 60,000 miles | The car is modified, launched, tracked, used for mountain driving, or has contaminated fluid |
| Spark plugs | Follow the exact engine/model-year schedule | The engine is tuned, misfires, consumes oil, or has difficult starting |
| Coolant | Inspect at every service and follow the vehicle-specific replacement schedule | The system has been opened, coolant is contaminated, or the car is overheating |
| Belts, hoses, boots, and suspension | Inspect at every major service | You see cracking, leaks, torn boots, clunks, or fluid around a damper |
Subaru’s published schedules commonly place oil and filter replacement at 6 months or 6,000 miles. They also call for periodic inspections of the clutch, brakes, cooling system, steering, suspension, wheel bearings, and axle boots, with gear oil and differential service at larger intervals. See Subaru’s 2020 schedule for an example of the factory pattern.
2015-2021 VA WRX maintenance schedule
The VA WRX uses the FA20DIT direct-injection turbo engine. It has no timing belt, but it does have a turbocharger, direct-injection intake valves, an intercooler system, and a manual or CVT drivetrain that deserves regular inspection.
Every 6 months or 6,000 miles
- Replace the engine oil and filter.
- Check the oil level again after driving and look for leaks around the filter, drain plug, oil pan, turbo oil lines, and valve-cover area.
- Inspect the tires, tread wear, tire pressures, brake pads, rotors, and visible suspension components.
- Check coolant, brake fluid, clutch fluid on manual cars, windshield washer fluid, and battery condition.
- Look over intercooler couplers, intake hoses, vacuum lines, and the turbo inlet for loose clamps or cracks.
The VA interval changes within the generation: Subaru’s 2016 schedule lists brake and clutch fluid at 24,000 miles or 24 months, while the 2019 and 2020 schedules use 30,000 miles or 24 months. For a tuned VA WRX, oil level, fuel dilution, heat, and driving style can justify a shorter oil interval. Use the correct oil for the exact model year; our WRX motor oil guide covers that choice separately.
Every 12,000 miles or annually
- Rotate and inspect the tires.
- Inspect the engine air filter and cabin air filter.
- Inspect brake pad thickness, rotor condition, brake lines, and parking-brake operation.
- Inspect the steering and suspension for play, leaking dampers, worn bushings, and damaged boots.
- Check the alignment if the steering wheel is off-center, the car pulls, or the tires are wearing on one edge.
Do not wait for a scheduled service if the car has developed a pull, vibration, clunk, new tire noise, or uneven tread wear. AWD cars are especially sensitive to mismatched tire diameter, so replace tires as a matched set when tread-depth differences become significant.
Brake and clutch fluid: 24 months; 24,000 miles in 2016, 30,000 miles in 2019-2021
- Replace the brake fluid.
- On manual cars, replace or flush the clutch hydraulic fluid with the brake-fluid service.
- Inspect the clutch, drive belts, fuel lines, cooling hoses, axle boots, wheel bearings, and exhaust heat shields.
- Inspect the PCV system and crankcase hoses.
- Inspect the intercooler and turbo plumbing for oil residue, loose connections, and boost leaks.
The FA20 is direct injected, so fuel does not wash the back of the intake valves in the same way it does on a port-injected engine. If the car has rough idle, cold-start misfires, hesitation, or power loss, add intake-valve carbon inspection to the diagnostic plan. Do not automatically schedule a walnut blast by mileage alone; verify the condition first. See the FA20 engine guide, WRX walnut-blasting guide, and WRX AOS and catch-can guide.
Transmission and differential inspection: 48,000 miles in 2016, 60,000 miles in 2019-2021
- Service the manual transmission gear oil and front/rear differential gear oil according to the vehicle’s maintenance booklet.
- Replace the engine air filter if it has not already been replaced.
- Inspect the clutch, shifter cables, CVT system if equipped, axles, wheel bearings, and suspension more closely.
- Replace spark plugs at the exact model-year interval if they are due.
The gear-oil inspection interval also changes within the VA generation. Subaru’s 2016 schedule lists transmission and differential gear-oil inspection at 48,000 miles, while the 2019 and 2020 schedules list it at 60,000 miles. Inspect the old fluid and drain plug when service is performed, especially on a modified or aggressively driven car.
2022+ VB WRX maintenance schedule
The VB WRX uses the FA24DIT and is available with a six-speed manual transmission or Subaru Performance Transmission, depending on trim and model year. The broad maintenance pattern remains familiar: oil, tires, brakes, filters, fluids, and inspections. The correct fluid and service procedure still depend on the transmission fitted to the car. For symptom-based troubleshooting, see our FA24DIT common problems and reliability guide.
Every 6 months or 6,000 miles
- Replace the engine oil and filter.
- Check the oil level, coolant level, tire pressures, and brake-fluid level.
- Inspect the tires, brakes, suspension, axles, steering, and underbody.
- Inspect the intake, turbo inlet, intercooler connections, and exhaust for damage or leaks.
- Check for software updates, warning lights, and stored diagnostic codes when the car has been modified or driven hard.
Check the FA24’s oil on level ground, use the dipstick correctly, and investigate a falling level rather than simply topping it off forever. If the car is tuned, monitor oil level and engine behavior more closely and keep records of every service.
Every 12,000 miles or annually
- Rotate and inspect the tires.
- Inspect or replace the engine air filter and cabin air filter as needed.
- Inspect brake pads, rotors, lines, and parking-brake operation.
- Check alignment and tire wear, especially on cars with aftermarket wheels, springs, or coilovers.
- Inspect the clutch and shifter on manual cars.
- Inspect the SPT/CVT system according to the exact model-year schedule if equipped.
The VB’s factory intercooler is different from the VA’s top-mount layout, but the same diagnostic principle applies: loose charge-air connections can cause poor boost control, drivability problems, and confusing datalogs. A larger intercooler, intake, turbo inlet, or other airflow change may also require a compatible calibration. Start with the WRX tuning guide before combining parts and software.
Every 24 months or 24,000 miles in the 2022 schedule
- Replace brake fluid.
- Flush clutch hydraulic fluid on manual cars when servicing the brake fluid.
- Inspect cooling hoses, drive belts, fuel lines, axle boots, wheel bearings, steering, suspension, and exhaust mounts.
- Inspect the underbody for corrosion and damage from winter roads.
- Inspect the PCV system and crankcase ventilation hoses.
The 2022 Subaru maintenance booklet lists brake and clutch fluid replacement at 24,000-mile or 24-month intervals. Confirm the schedule for later VB model years before applying this interval unchanged.
If the car is used for track days, do not treat the street brake-fluid interval as a track-preparation interval. Track use can overheat fluid in a single event. The WRX brake guide explains when fluid and pad upgrades make more sense than jumping straight to a big-brake kit.
At the transmission, differential, and spark-plug intervals
- Service the manual transmission and differentials when specified by the maintenance booklet.
- Follow the model-specific inspection or replacement interval for SPT/CVT fluid.
- Replace spark plugs when due.
- Inspect the turbocharger, charge-air system, PCV system, clutch, wheel bearings, and suspension for wear.
- Replace coolant only according to the specified schedule or when the system has been contaminated, opened for repair, or diagnosed with a cooling problem.
Do not copy a VA fluid interval into a VB service record without checking the VB booklet. Subaru revises schedules and fluid requirements by model year, transmission, and market.
2002-2014 EJ WRX maintenance schedule
Older WRX models use EJ-series engines with different maintenance concerns from the FA20 and FA24. The biggest scheduling difference is the timing belt: EJ engines use a belt, not a chain.
The schedule below is a useful factory baseline for a U.S.-market 2002-2014 EJ WRX. It follows Subaru’s published 2014 schedule, which lists 7,500-mile oil service, 30,000-mile inspections and brake/clutch-fluid replacement, 45,000-mile air-filter replacement, 60,000-mile drivetrain-fluid inspection, 90,000-mile spark plugs, and a 105,000-mile timing-belt replacement. Earlier model years can differ, so use the booklet for your exact year before treating these numbers as universal. Subaru’s 2014 schedule is the reference for this table.
| EJ WRX service | Factory-style baseline for 2002-2014 cars | What to do |
|---|---|---|
| Engine oil and filter | Every 6 months or 7,500 miles | Replace oil and filter; check the level frequently between services |
| Tires and cabin/A/C filter | Every 12 months or 12,000 miles | Rotate and inspect tires; replace the cabin/A/C filter |
| Major inspection and brake/clutch fluid | Every 24 months or 30,000 miles | Inspect belts, fuel and cooling systems, clutch, brakes, axle boots, steering, suspension, and wheel bearings; replace brake fluid and manual-transmission clutch fluid |
| Engine air filter | Every 45 months or 45,000 miles | Replace the air cleaner element |
| Transmission and differential gear oil | Inspect every 60 months or 60,000 miles | Inspect for leaks, contamination, and metallic debris; service sooner under severe use |
| Fuel filter | Every 72 months or 72,000 miles | Replace the fuel filter where applicable to the model and fuel system |
| Spark plugs | Every 90 months or 90,000 miles | Replace and inspect the ignition system for oil in the plug wells or damaged boots |
| Timing belt | Every 105 months or 105,000 miles | Replace the belt and inspect or replace the tensioner, idlers, water pump, and seals as needed |
| Engine coolant | First replacement at 11 years or 137,500 miles; then every 6 years or 75,000 miles | Use the coolant and conditioner requirements specified for the vehicle |
The 2014 schedule lists gear oil as an inspection at 60,000 miles rather than a universal replacement. For an old WRX with unknown records, replacing the transmission and differential fluids is a sensible catch-up service after checking the correct fluid and fill procedure. On a car that sees track days, launches, rally-style use, or severe winter/mountain conditions, use the severe-service guidance instead of waiting for the normal interval.
Severe-service EJ intervals
Subaru’s older maintenance booklet defines severe conditions broadly: repeated short trips, dusty or muddy roads, extreme temperatures, road salt, coastal exposure, and similar use. In the 2011 official booklet, Subaru specifies:
- Engine oil and filter every 3,750 miles or 3.75 months.
- Transmission and differential gear-oil replacement every 15,000 miles when frequently operated under severe conditions.
- Brake fluid every 15,000 miles or 15 months in high-humidity or mountainous areas.
- Vehicle inspections every 7,500 miles or 7.5 months under severe conditions.
These are especially relevant to modified EJ cars because many are driven harder than the normal schedule assumes. See Subaru’s 2011 Warranty & Maintenance Booklet, including the severe-driving notes on pages 29-32.
For EJ-powered cars, also pay particular attention to:
- Engine oil level and oil-pressure warning signs.
- Timing belt, tensioner, idler, and water-pump history.
- Turbo oil lines, banjo filters where applicable, and oil leaks.
- Coolant hoses, radiator condition, and overheating history.
- Spark plugs and ignition coils.
- Compression and leakdown results on a high-mileage or modified engine.
- Manual transmission and differential fluid condition.
- Clutch engagement, release bearing noise, and gear synchro behavior.
- Previous tuning, boost-control hardware, and evidence of detonation.
An EJ car with no maintenance records should be treated as a catch-up project. A timing-belt sticker alone does not prove the water pump, tensioner, idlers, cam seals, and crank seal were serviced correctly. For a used example, schedule a Subaru-specialist inspection before spending money on power modifications.
2004-2021 WRX STI maintenance schedule
The U.S.-market WRX STI uses the EJ-series turbo engine through the 2021 model year. Its maintenance plan overlaps with the EJ WRX schedule, but the STI adds a six-speed manual drivetrain, DCCD center-differential control, front and rear limited-slip differentials, and Brembo brakes. Inspect those systems separately during major service. Subaru’s owner materials identify the timing belt, transmission gear oil, front and rear differential gear oil, clutch, brakes, and suspension as separate maintenance or inspection areas. See Subaru’s 2019 maintenance recommendations and the 2018 WRX/STI quick guide.
| STI service area | What the owner should plan for | Scope and evidence |
|---|---|---|
| Engine oil and filter | Follow the exact booklet, check the oil level between services, and shorten the interval for severe use or a modified car | EJ257-powered U.S. STI models; the factory schedule takes priority |
| Timing belt system | Replace the belt and assess the tensioner, idlers, water pump, and related seals at the same service | 2014 schedule example: 105,000 miles or 105 months; 2016 schedule example: 105,000 miles or 105 months; 2019-2021 schedule examples: 100,000 miles or 96 months |
| Six-speed transmission and differentials | Inspect for leaks, gear noise, hard shifting, metal on the drain plug, and unknown fluid history; service each fill point with the specified fluid | Transmission, front differential, rear differential, and DCCD-related requirements vary by year and service information |
| Clutch and release system | Check engagement, slip, pedal feel, release noise, and hydraulic-fluid condition | All U.S.-market STI models in this range use a manual transmission |
| Brembo brakes | Inspect pad thickness, rotor condition, caliper leaks, brake-fluid age, and heat damage | STI equipment varies by year and trim; choose pads and rotors by the exact car |
| Tires and AWD | Keep all four tires matched to the vehicle requirements and investigate binding, vibration, or uneven wear | Tire circumference affects the AWD and differential systems |
The timing-belt interval changes across the STI years. Subaru’s 2014 and 2016 schedules list 105,000 miles or 105 months, while the 2019-2021 schedules list 100,000 miles or 96 months for the WRX STI. Use the booklet for the exact model year.
For a used STI with incomplete records, prioritize the timing-belt documentation, compression and leakdown evidence when condition warrants it, oil-pressure history, transmission and differential fluid condition, clutch behavior, DCCD warning lights, Brembo brake condition, tire matching, and evidence of launches or track use. A clean engine bay or a recent oil change does not establish the condition of the drivetrain.
STI service items that change the budget
The expensive STI maintenance events are usually tied to access and parts, not the routine oil change. Price these items separately when assessing a used car:
- Timing-belt service with the tensioner, idlers, water pump, and seals that need replacement.
- Six-speed transmission or differential work after gear noise, grinding, pop-out, leaks, or metal contamination.
- Clutch, flywheel, release-bearing, or hydraulic repairs when the transmission is already being removed.
- Brembo rotors, pads, caliper service, and high-temperature brake fluid for cars driven hard.
- Matched tires and alignment after uneven wear, a tire replacement, or suspension work.
Use the Subaru WRX maintenance cost guide for broader budgeting. That article compares WRX generations; this section identifies the STI-specific service events that can move the budget.
Extra maintenance for modified WRXs and STIs
Add these checks when the car has an intake, downpipe or j-pipe, intercooler, turbo inlet, boost-control solenoid, flex-fuel system, or aftermarket tune:
- Confirm that the tune matches the exact hardware, fuel, transmission, and model year.
- Inspect clamps, couplers, vacuum lines, and heat shielding after the first few drives and at every oil change.
- Check for unusual feedback knock, fine knock learning, DAM changes, fuel trims, and boost behavior rather than reacting to one isolated data point. See Subaru knock correction explained.
- Replace spark plugs sooner if the tuner recommends it or if the car develops a misfire.
- Check the oil level before long drives and after track sessions.
- Inspect the clutch, transmission, axles, wheel bearings, and engine mounts more often if the car is launched or driven aggressively.
- Keep emissions equipment and readiness monitors intact on a street car. Current tuning support and emissions rules should be checked before installing catalyst-related parts; see the WRX Stage 2 guide.
What to do after buying a used WRX or STI
For an incomplete service history, start with the following. An STI needs the same basic checks as a WRX plus timing-belt, six-speed, differential, DCCD, clutch, and Brembo-brake records:
- Record the VIN, model year, engine, transmission, mileage, and modifications.
- Check the oil level and inspect for leaks before driving the car hard.
- Change the engine oil and filter with the correct specification.
- Inspect or replace the air and cabin filters.
- Test the battery and scan for stored or pending codes.
- Inspect brakes, tires, alignment, suspension, axles, and wheel bearings.
- Flush brake and clutch fluid if its age is unknown.
- Service transmission and differential fluids if their history is unknown and the fluids are due for the vehicle.
- Verify spark-plug, coolant, timing-belt, and valve-cleaning history according to the engine family.
- Have a Subaru-focused shop perform compression, leakdown, boost-leak, and underbody checks when the car is modified or has unexplained symptoms.
For a focused explanation of manual gear-oil types, capacities, CVT/SPT differences, and fill procedure, see our Subaru WRX transmission fluid guide.
WRX and STI Maintenance FAQ
How often should I change the oil in a WRX?
Use the factory interval for your model year as the baseline for normal driving. Later WRX schedules commonly specify 6 months or 6,000 miles, while older EJ schedules can specify 7,500 miles. A shorter interval is sensible for track use, repeated short trips, high heat, heavy modifications, or an engine that consumes or dilutes oil. Check the level regularly between changes.
Does a tuned WRX need more maintenance?
Usually, yes. The tune itself does not create a universal service interval, but higher cylinder pressure, heat, boost, and drivetrain load make inspection more important. Follow the tuner’s spark-plug and fluid recommendations, verify every hardware change has compatible calibration, and monitor the car instead of relying only on a calendar.
Does the WRX have a timing belt?
EJ-powered WRX and STI models use a timing belt. The FA20DIT in the 2015-2021 VA WRX and the FA24DIT in the 2022+ VB WRX use timing chains. Confirm the engine family before ordering parts or planning service.
What extra maintenance does a WRX STI need?
The STI uses the EJ257 through the 2021 U.S. model year and needs timing-belt planning plus inspection of its six-speed transmission, front and rear differentials, DCCD system, clutch, Brembo brakes, and matched tires. The exact intervals and fluid requirements depend on the model year, so use the STI booklet rather than copying a regular WRX schedule.
When should I change WRX transmission and differential fluid?
Follow the exact maintenance booklet for the car’s year and transmission. VA schedule examples list gear-oil inspection at 48,000 or 60,000 miles, while VB requirements are model-year-specific. Modified, tracked, launched, or heavily used cars may need earlier inspection and service. CVT/SPT fluid requirements are different and should not be treated like manual gear oil.
Does every FA20 or FA24 WRX need walnut blasting?
No. Both engines use direct injection, so intake-valve deposits are possible, but mileage alone does not prove that cleaning is needed. Diagnose symptoms and inspect the valves when appropriate. Rough idle, misfires, hesitation, and power loss can have many other causes.
Final checklist
At every oil change, check the level, leaks, tires, brakes, filters, intake plumbing, intercooler connections, and warning lights. At every annual or major service, inspect the drivetrain fluids, suspension, wheel bearings, axle boots, cooling system, clutch, and alignment. Use the exact Subaru booklet when this guide and the vehicle-specific schedule differ.
Sources and further reading
Maintenance intervals can change between model years, markets, and transmissions. The main references used for this guide are:
- Subaru vehicle resources - current owner manuals and warranty/maintenance booklets by model year.
- Subaru 2016 maintenance recommendations - an earlier VA-era schedule showing oil, brake/clutch fluid, filters, gear oil, spark plugs, and timing-belt entries.
- Subaru 2014 maintenance recommendations - the EJ-era schedule reference used for the older WRX table in this article.
- 2011 Subaru Warranty and Maintenance Booklet - official severe-driving intervals and the older timing-belt, fluid, inspection, and filter schedule.
- Subaru 2018 maintenance recommendations - a later VA-era schedule with the 6,000-mile oil interval, 30,000-mile inspection group, and 60,000-mile gear-oil service example.
- Subaru 2019 maintenance recommendations - the VA STI timing-belt and spark-plug schedule reference.
- Subaru 2020 maintenance recommendations - the schedule reference used for the recurring 6-month/6,000-mile oil interval and major inspection categories in this article.
- 2022 Subaru Warranty and Maintenance Booklet - official booklet reference for the VB-era transition and Subaru maintenance responsibilities.
These sources support the factory baseline. Recommendations for shorter intervals on tuned, tracked, or severe-use cars are practical ownership guidance, not replacement factory requirements.