2021 Mazda Mazda3 - Maintenance & Specs

The 2021 Mazda Mazda3 belongs to a Mazda Mazda3 lineup that Know Your Ride tracks across 8 model years, from 2004 to 2025. Records for this year list a 2.0L I4 / 2.5L I4 engine. The 2021 sits mid-run, with both earlier (2004) and later (2025) Mazda3 model years also documented.

It takes 0W-20 full synthetic oil, 4.5 qt with a new filter meeting API SP. Fluid specs on file include FL22 coolant, DOT 3 brake fluid, Mazda ATF FZ transmission fluid. Know Your Ride lists 15 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 (16), air bags (4), unknown or other (4). A representative report reads: "My rear differential case cracked, anytime the four wheel drive system was engaged the entire drivetrain would lock up. Luckily we were only on side roads so..." There is 1 safety recall on record; one covers: Mazda North American Operations (Mazda) is recalling certain 2021 Mazda3 and CX-30 vehicles. Air may suddenly leak from the tire air valve..

Quick Specs

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.