2021 Subaru Ascent maintenance schedule

Written in plain English and reviewed by the eli5cars editorial team · Last reviewed June 2026

2.4L FA24 turbocharged 4-cylinder boxer (260 hp) — Subaru high-torque Lineartronic CVT; Symmetrical AWD standard; 3-row, up to 8-passenger seatingBasePremiumLimitedMSRP $32,300

Jump to a mileage milestone:

30k miles 60k miles 90k miles 120k miles

Full service timeline

Mileage	Service items	Details
6k mi	Engine oil and filter change — 0W-20 full synthetic (Subaru factory spec for the turbocharged FA24) — Subaru's normal schedule is 6,000 mi/6 months, whichever comes first; on-time changes are especially important on this turbo engine since heat-soaked, degraded oil accelerates turbo bearing wear Tire rotation Inspect brake pads, rotors, lines and hoses (Ascent's added weight and towing use increase brake wear versus non-turbo Subaru models) Inspect CVT fluid level — Subaru High Torque CVT Fluid (HP CVTF), a different spec than the standard Lineartronic fluid used in non-turbo Subaru models Inspect turbocharger boost hoses, intercooler, and connections for leaks or cracking Inspect coolant, brake fluid, and washer fluid levels Check tire pressure to door-placard spec
15k mi	Engine oil and filter change (0W-20 full synthetic) Tire rotation Inspect brake system front and rear Replace cabin air filter if dusty or restricted Inspect engine air filter — replace if needed Inspect CVT fluid (HP CVTF) condition and level Inspect turbocharger oil feed and return lines; inspect for oil seepage at turbo housing
30k mi	Engine oil and filter change (0W-20 full synthetic) Tire rotation Replace engine air filter Replace cabin air filter Inspect spark plugs — factory-spec iridium; turbocharged FA24 typically calls for earlier plug service than naturally-aspirated FB engines due to higher cylinder pressures — inspect at 30k, plan to replace by 60k CVT fluid (HP CVTF) change recommended under severe-duty conditions (towing, mountain driving, frequent stop-and-go); inspect-only under normal use Replace rear differential gear oil Inspect brake fluid — replace if moisture-contaminated Inspect coolant condition — Subaru Super Coolant (long-life) Inspect turbocharger wastegate actuator and boost control solenoid operation	View →
60k mi	Engine oil and filter change (0W-20 full synthetic) Tire rotation Replace spark plugs — iridium, turbo-spec (heat range and gap differ from naturally-aspirated FB-series engines — use Subaru/NGK part number specific to the FA24) Replace cabin air filter Replace engine air filter CVT fluid (HP CVTF) change — commonly recommended preventive service on turbo/towing-capable models even under nominally normal use Replace rear differential gear oil Replace brake fluid Inspect coolant — top off or replace if contaminated Inspect turbocharger for shaft play, oil consumption, and unusual noise (whine/whistle under boost) Inspect wheel bearings, ball joints, and suspension bushings	View →
90k mi	Engine oil and filter change (0W-20 full synthetic) Tire rotation Inspect spark plugs — condition and gap Inspect CVT fluid (HP CVTF) level and condition Replace brake fluid Inspect timing chain, tensioner, and guides — lifetime component under normal use, no timing belt on the FA24 Inspect accessory drive belt; replace if cracked or glazed Inspect turbocharger boost hoses and intercooler piping for cracking Full brake inspection front and rear	View →
120k mi	Engine oil and filter change (0W-20 full synthetic) Tire rotation Replace spark plugs — iridium, turbo-spec (second full replacement interval) Replace CVT fluid (HP CVTF) Replace rear differential gear oil Replace coolant — Subaru Super Coolant flush and refill Replace brake fluid Replace accessory drive belt Inspect turbocharger thoroughly: shaft play, oil lines, wastegate, boost leaks Full suspension and steering inspection Inspect wheel bearings front and rear	View →

Common symptoms for this vehicle

Check engine light on? Get a free code scan

If your check engine light is on, most auto-parts stores (AutoZone, O'Reilly, Advance) will read the code for FREE — no purchase required, just walk in. Bring the code back here and look it up at eli5cars.com/obd2 for the plain-English explanation.

Note: a scan only helps when there's an active fault code. For purely mechanical symptoms (noises, vibrations, leaks), a scan may show nothing — the suspects listed above are your starting point.