2021 Mazda CX-9 - Maintenance & Specs
The 2021 Mazda CX-9 belongs to a Mazda CX-9 lineup that Know Your Ride tracks across 4 model years, from 2020 to 2026. Engine options on record include the 2.5L, 2.5L I4. It is configured as front-wheel drive with an automatic (s6). The 2021 sits mid-run, with both earlier (2020) and later (2026) CX-9 model years also documented.
It takes 5W-30 full synthetic oil, 4.8 qt with a new filter. Fluid specs on file include FL22 coolant, DOT 3 brake fluid, Mazda ATF FZ transmission fluid. Know Your Ride lists 12 scheduled maintenance items for this vehicle, the earliest interval falling at 7,500 miles. Documented torque values include oil drain plug 27 ft-lb, lug nut 80 ft-lb, spark plug 18 ft-lb.
NHTSA complaints for this vehicle cluster around engine (15), unknown or other (3), service brakes (2). A representative report reads: "Backup camera shows three to four feet before red collision line is not accurate causing severe damage to my garage door." There is 1 safety recall on record; one covers: Mazda North American Operations (Mazda) is recalling certain 2020-2021 CX-9 vehicles equipped with 60/40 split bench second-row seats. The left-side....
EPA fuel economy is rated at 22 city / 28 highway MPG, 24 MPG combined. Estimated annual fuel cost is about $1,800.
Quick Specs
| Oil viscosity | 5W-30 |
| Oil type | Full Synthetic |
| Oil capacity (w/ filter) | 4.8 qt |
| Oil filter | Mazda PY8W-14-302 |
| EPA combined | 24 MPG |
| Tire size | 245/60R18 |
| Coolant | FL22 |
| NHTSA overall | 5 / 5 stars |
| Open recalls on record | 1 |
| Technical service bulletins | 200 |
Common Trouble Codes
- P0300 - Random/Multiple Cylinder Misfire Detected
- P0420 - Catalyst System Efficiency Below Threshold (Bank 1)
- P0171 - System too Lean (Bank 1)
- P0128 - Insufficient Coolant Temperature for Stable Operation
- P0442 - Evaporative Emission Control System Leak Detected (small leak)
- P0455 - Evaporative Emission Control System Leak Detected (gross leak)
- P0700 - Transmission Control System Malfunction
- P0301 - Cylinder 1 Misfire Detected
- U0100 - Lost Communication With ECM/PCM A
Related Vehicles
Part of the free Know Your Ride vehicle maintenance reference. Figures are sourced from EPA, NHTSA and manufacturer data and are for general reference - always confirm with your owner's manual.