2021 Mazda Cx-9 Maintenance
Manufacturer-Recommended Service Schedule
The manufacturer-recommended maintenance schedule for the 2021 Mazda Cx-9 is shown above. Keeping up with these service intervals prevents premature wear, maintains fuel economy, and protects your powertrain warranty.
The most critical intervals are engine oil changes (typically every 5,000–10,000 miles for full synthetic), tire rotation (every 5,000–7,500 miles), and brake fluid (every 2–3 years). Always verify intervals against your owner's manual — the schedule varies by driving conditions.
| Service Item | Interval | Notes |
|---|---|---|
| Engine Oil & Filter | 7,500 mi / 12 mo | 5W-30 synthetic, 4.8 qt (2.5L turbo SKYACTIV-G) |
| Tire Rotation | 7,500 mi / 6 mo | Rotate every 7,500 mi |
| Cabin Air Filter | 20,000 mi / 24 mo | Replace as needed |
| Engine Air Filter | 30,000 mi / 36 mo | Inspect at 15,000 mi |
| Brake Fluid | 30,000 mi / 24 mo | DOT 3 or 4 |
| Transmission Fluid | 75,000 miles | 6-speed SKYACTIV automatic; Mazda ATF FZ |
| Coolant | 120,000 miles | Mazda Long Life coolant; then every 60,000 mi |
| Spark Plugs | 75,000 miles | Iridium-tipped |
| Serpentine Belt | 75,000 miles | Inspect at 60,000 mi |
| Battery | 60 months | Inspect annually; i-stop system |
Key Fluid & Maintenance Specs
Motor Oil
0W-20 Full Synthetic — 4.8 qt
Lug Nut Torque
80-108 ft-lbs
Brake Fluid
DOT 3
Coolant
FL22 Long Life Coolant (Green)
More for the 2021 Mazda Cx-9