Estimated maintenance schedule for the 2021 Toyota 4Runner
GarageHub's estimates for the 2021 4Runner, not the manufacturer's maintenance schedule.
GarageHub estimates the 2021 Toyota 4Runner oil change interval at every 10,000 mi or 12 months, whichever comes first (estimated cost $50-$90); this is not the manufacturer's figure, so check your owner's manual.
Service intervals
GarageHub estimates for the 2021 Toyota 4Runner, 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 item | 10,000 mi / 12 mo≈ 16,000 km / 12 mo | $50-$90 | |
| Tire Rotation | 5,000 mi / 6 mo≈ 8,000 km / 6 mo | $25-$50 | |
| Engine Air Filter | 30,000 mi / 36 mo≈ 48,000 km / 36 mo | $25-$50 | |
| Cabin Air Filter | 30,000 mi / 36 mo≈ 48,000 km / 36 mo | $20-$45 | |
| Spark Plugs | 120,000 mi / 144 mo≈ 193,000 km / 144 mo | $180-$280 | |
| Engine Coolant | 100,000 mi / 120 mo≈ 161,000 km / 120 mo | $120-$180 | |
| Brake Fluid (inspect level/condition) | 5,000 mi / 6 mo≈ 8,000 km / 6 mo | — | |
| Brake InspectionSafety item | 5,000 mi / 6 mo≈ 8,000 km / 6 mo | — | |
| Automatic Transmission Fluid (inspect) (5-speed automatic only) | 30,000 mi / 36 mo≈ 48,000 km / 36 mo | — | |
| Rear Differential Fluid (inspect) | 15,000 mi / 18 mo≈ 24,000 km / 18 mo | — | |
| Front Differential Fluid (inspect) (4WD only) | 15,000 mi / 18 mo≈ 24,000 km / 18 mo | — | |
| Transfer Case Fluid (inspect) (4WD only) | 30,000 mi / 36 mo≈ 48,000 km / 36 mo | — | |
| Propeller Shaft Lubricate & Re-torque | 15,000 mi / 18 mo≈ 24,000 km / 18 mo | — | |
| Drive Belt Inspection | 60,000 mi / 72 mo≈ 97,000 km / 72 mo | — | |
| Suspension & Steering Inspection | 15,000 mi / 18 mo≈ 24,000 km / 18 mo | — |
≈ converted from the other unit and rounded.
Est. costs are US-typical, in USD.
- 0 Due now
- 0 Within 5,000 mi
- 0 Later
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GarageHub · Free · Your AI MechanicOpenWhat happens if you skip it
- Deferred differential service in 4WD models leads to metal particulate accumulation, scoring ring-and-pinion gears and necessitating costly axle rebuilds.
- Ignoring brake fluid flushes allows moisture contamination, which corrodes ABS actuator internals and reduces pedal firmness during emergency stops.
- Skipping transfer case fluid changes in part-time 4WD systems risks chain stretch and fork wear, manifesting as grinding noises during mode shifts.
- Overdue spark plug replacement causes misfires that damage ignition coils (common on the 1GR-FE) and degrade fuel economy by 10–15%.
- Postponing coolant service permits silicate dropout, clogging radiator tubes and water pump passages, leading to overheating and head gasket stress.
Common issues at higher mileage
- 80,000+ mi
- Lower ball joint wear in the front suspension, especially on 4WD models, causing clunking over bumps and requiring replacement.
- 100,000+ mi
- Water pump weeping or bearing noise on the 1GR-FE, showing as coolant crust at the weep hole or a low-coolant warning.
- 120,000+ mi
- Exhaust manifold stud corrosion and cracking on the 1GR-FE, producing ticking noises at cold start and potential exhaust leaks.
- 150,000+ mi
- Rear axle seal leaks in 4WD models, particularly after sustained off-road use, contaminating brake components if unaddressed.
- 100,000+ mi
- Radiator plastic end-tank cracking from heat cycling, leading to coolant seepage and requiring radiator replacement.
- 80,000+ mi
- Front wheel bearing noise (humming or growling) becomes more common, accelerated by off-road driving and water exposure.
Common questions about the 2021 Toyota 4Runner
How often does a 2021 Toyota 4Runner need an oil change?
GarageHub estimates the 2021 Toyota 4Runner oil change interval at every 10,000 mi or 12 months, whichever comes first (estimated cost $50-$90); this is not the manufacturer's figure, so check your owner's manual.
What maintenance does a 2021 Toyota 4Runner need?
GarageHub's estimate of the services not to skip on a 2021 Toyota 4Runner: engine oil & filter every 10,000 mi / 12 mo; brake inspection every 5,000 mi / 6 mo. These intervals are estimates, not the manufacturer's maintenance schedule. Check your owner's manual for the exact figures.
What goes wrong on a Toyota 4Runner at higher mileage?
What owners report as the miles add up — 80,000+ mi: Lower ball joint wear in the front suspension, especially on 4WD models, causing clunking over bumps and requiring replacement. 100,000+ mi: Water pump weeping or bearing noise on the 1GR-FE, showing as coolant crust at the weep hole or a low-coolant warning. 120,000+ mi: Exhaust manifold stud corrosion and cracking on the 1GR-FE, producing ticking noises at cold start and potential exhaust leaks. 150,000+ mi: Rear axle seal leaks in 4WD models, particularly after sustained off-road use, contaminating brake components if unaddressed. 100,000+ mi: Radiator plastic end-tank cracking from heat cycling, leading to coolant seepage and requiring radiator replacement. 80,000+ mi: Front wheel bearing noise (humming or growling) becomes more common, accelerated by off-road driving and water exposure.
Keep this schedule for your 4Runner
Log what you've done, get reminded what's next. Rev knows the intervals for your 4Runner.