Estimated maintenance schedule for the 2021 Subaru Forester
GarageHub's estimates for the 2021 Forester, not the manufacturer's maintenance schedule.
GarageHub estimates the 2021 Subaru Forester oil change interval at every 6,000 mi or 6 months, whichever comes first (estimated cost $35–$75); this is not the manufacturer's figure, so check your owner's manual.
Service intervals
GarageHub estimates for the 2021 Subaru Forester, not taken from the manufacturer's maintenance schedule. Check your owner's manual for the exact figures.
| Service | Every | Est. Cost | Status |
|---|---|---|---|
| Engine Oil & FilterSafety itemGuide How to Change Your Oil · The engine oil system: what every part does | 6,000 mi / 6 mo≈ 9,500 km / 6 mo | $35–$75 | |
| Tire RotationGuide How to Rotate Your Tires at Home · How to Choose and Use a Torque Wrench | 7,500 mi≈ 12,000 km | $20–$50 | |
| Engine Air Filter ReplacementGuide How to Replace Your Air Filter (Engine & Cabin) | 30,000 mi≈ 48,000 km | $30–$60 | |
| Cabin Air Filter ReplacementGuide How to Replace Your Cabin Air Filter | 15,000 mi≈ 24,000 km | $25–$50 | |
| Brake Fluid Inspection & FlushSafety itemGuide How to Bleed Brakes (and Change Brake Fluid) | 24 mo | $100–$200 | |
| Brake Pads & Rotor InspectionSafety itemGuide How to Change Brake Pads: Step-by-Step Guide | 30,000 mi≈ 48,000 km | $150–$400 | |
| CVT Fluid Inspection & ReplacementSafety itemGuide How to Change Transmission Fluid | 60,000 mi≈ 97,000 km | $150–$250 | |
| Engine Coolant Flush & ReplacementGuide How to Flush Your Coolant System | 105,000 mi≈ 169,000 km | $100–$180 | |
| Spark Plugs ReplacementGuide How to Change Spark Plugs · How to Choose and Use a Torque Wrench | 60,000 mi≈ 97,000 km | $100–$200 | |
| Transmission Fluid Check (CVT)Safety itemGuide How to Change Transmission Fluid | 30,000 mi≈ 48,000 km | $0–$30 | |
| All-Wheel Drive System Inspection | 60,000 mi≈ 97,000 km | $50–$100 | |
| Battery Inspection & ReplacementGuide How to Replace a Car Battery (on a Modern Car) · The car battery and charging system: what every part does | 36 mo | $100–$200 | |
| Suspension & Steering InspectionGuide Suspension and Steering Inspection Guide | 60,000 mi≈ 97,000 km | $75–$150 |
≈ converted from the other unit and rounded.
Est. costs are US-typical, in USD.
What happens if you skip it
- Skipping CVT fluid service is the leading cause of transmission failure in Foresters; repairs exceed $3,000–$5,000 and often result in total replacement.
- Neglecting brake fluid flushes allows moisture to corrode the ABS module and brake lines, leading to brake failure or expensive ABS repairs ($800+).
- Ignoring spark plug replacement at 60,000 miles causes misfires, reduced fuel economy, and potential catalytic converter damage.
- Delaying coolant replacement accelerates corrosion of the aluminum cylinder head and water pump, increasing long-term wear on cooling system components.
- Skipping tire rotations on the AWD system causes uneven wear and premature differential stress, potentially requiring $1,500+ differential service.
- Neglecting cabin air filter replacement reduces HVAC efficiency and can allow moisture into the blower motor, causing mold and electrical failures.
Common issues at higher mileage
- 80,000+ mi
- CVT shuddering, hesitation, or overheating; fluid degradation is the primary cause and requires fluid replacement or transmission rebuild.
- 90,000+ mi
- Brake pad wear sensors failing or brake fluid contamination causing ABS light activation; fluid flush and sensor replacement needed.
- 100,000+ mi
- Strut mount bearing wear causing clunking noises over bumps; suspension refresh ($600–$1,200) extends vehicle life.
- 100,000+ mi
- Minor oil seepage from valve cover or cam seals can occur with age; head gasket failure, a known issue on older SOHC EJ25 engines, is rare on the FB25 DOHC engine used in the 2021 Forester.
Common questions about the 2021 Subaru Forester
How often does a 2021 Subaru Forester need an oil change?
GarageHub estimates the 2021 Subaru Forester oil change interval at every 6,000 mi or 6 months, whichever comes first (estimated cost $35–$75); this is not the manufacturer's figure, so check your owner's manual.
What maintenance does a 2021 Subaru Forester need?
GarageHub's estimate of the services not to skip on a 2021 Subaru Forester: engine oil & filter every 6,000 mi / 6 mo; brake fluid inspection & flush every 24 mo; brake pads & rotor inspection every 30,000 mi; cvt fluid inspection & replacement every 60,000 mi; transmission fluid check (cvt) every 30,000 mi. These intervals are estimates, not the manufacturer's maintenance schedule. Check your owner's manual for the exact figures.
What goes wrong on a Subaru Forester at higher mileage?
What owners report as the miles add up — 80,000+ mi: CVT shuddering, hesitation, or overheating; fluid degradation is the primary cause and requires fluid replacement or transmission rebuild. 90,000+ mi: Brake pad wear sensors failing or brake fluid contamination causing ABS light activation; fluid flush and sensor replacement needed. 100,000+ mi: Strut mount bearing wear causing clunking noises over bumps; suspension refresh ($600–$1,200) extends vehicle life. 100,000+ mi: Minor oil seepage from valve cover or cam seals can occur with age; head gasket failure, a known issue on older SOHC EJ25 engines, is rare on the FB25 DOHC engine used in the 2021 Forester.