AutoUtility currently tracks 17 official NHTSA owner defect complaints for the 2021 Mazda Mazda6. Engine & Cooling issues are the most frequently reported category, appearing in 12 complaints (70.6% of submitted records). Zero crashes, fires, injury reports, or fatality reports are cited across these complaint records.

Key Problem Findings
  • • Total NHTSA Complaints: 17 reports
  • • #1 Reported Problem Area: Engine & Cooling (12 reports • 70.6% of submitted complaints)
  • • Secondary Problem Areas: Visibility, Wipers & Glass (2), Driver Assistance & Safety Tech (1)
  • • Crash-Citing Complaints: 0 filings
  • • Fire-Citing Complaints: 0 filings
  • • Complaints Reporting Injuries / Fatalities: 0 injury filings • 0 fatality filings
Reporting Methodology: Statistics describe unverified consumer submissions voluntarily filed with NHTSA. Complaint volume is not normalized for vehicle sales volume or miles driven. Multiple components can be cited within a single owner complaint submission.
Total Complaints
17
Submitted to NHTSA ODI
Crash-Citing Complaints
0
Filings citing a collision
Fire-Citing Complaints
0
Filings citing smoke or fire
Complaints Reporting Injuries
0
Filings citing one or more injuries
Complaints Reporting Fatalities
0
Consumer filings citing fatalities

Most Reported Problems for 2021 Mazda Mazda6

Top automotive subsystem defect categories ranked by unique owner complaint volume in federal records

#1 Problem Area 70.6% of complaints

Engine & Cooling

12 owner complaints submitted to NHTSA ODI
✓ 0 crashes or fires cited
#2 Problem Area 11.8% of complaints

Visibility, Wipers & Glass

2 owner complaints submitted to NHTSA ODI
✓ 0 crashes or fires cited
#3 Problem Area 5.9% of complaints

Driver Assistance & Safety Tech

1 owner complaint submitted to NHTSA ODI
✓ 0 crashes or fires cited
#4 Problem Area 5.9% of complaints

Fuel & Propulsion System

1 owner complaint submitted to NHTSA ODI
✓ 0 crashes or fires cited
Domain Share Note: Share percentage represents the proportion of unique complaint filings referencing each vehicle system. Because single complaints may cite multiple systems (such as engine and electrical simultaneously), domain percentages represent individual category incidence and may sum to over 100%.

Symptoms Mentioned in NHTSA Owner Reports for 2021 Mazda Mazda6

Specific mechanical, electrical, and driver-assist defect symptoms identified via deterministic narrative analysis

AutoUtility uses deterministic phrase matching to identify recurring symptom descriptions within consumer-submitted NHTSA complaint narratives.

Engine & Cooling 17.6% of complaints

Engine Coolant Intrusion / Oil Leak

3 complaint narratives describe this symptom
Symptom Identification Method: A complaint may describe more than one symptom, so percentages may sum to more than 100%. Symptom identification reflects text contained in consumer-submitted complaint records and does not establish a confirmed mechanical diagnosis.

Recent NHTSA Owner Reports for 2021 Mazda Mazda6

Representative defect filings submitted by owners to the NHTSA Office of Defects Investigation

Driver Assistance & Safety Tech NHTSA ODI ID: #11668602
Filed: 06/23/2025

"The Infotainment system malfunctions. The rear view camera freezes, not with the current conditions but a still picture of a street I do not recognize. This puts not only myself at risk for an accident but those of others as well. This malfunction has been taken into the dealership on two different..."

Incident Date: 06/20/2025 • Raw NHTSA Component: BACK OVER PREVENTION
Other / Miscellaneous NHTSA ODI ID: #11598087
Filed: 07/01/2024

"Twice had low oil warning lamp appear. First time in July 2023, 2nd time in June 2024. Both times oil has just been changed 2-3 months prior. Saw articles that there was a recent lawsuit, which is why I am filling complaint as well. Not for lawsuit, but for repairs so this does not occur again."

Incident Date: 06/18/2024 • Raw NHTSA Component: UNKNOWN OR OTHER
Engine & Cooling NHTSA ODI ID: #11560526
Filed: 12/17/2023

"Engine oil low warning 2k miles after oil change and again a week after topping oil off."

Incident Date: 12/17/2023 • Raw NHTSA Component: ENGINE
Engine & Cooling NHTSA ODI ID: #11528713
Filed: 06/25/2023

"My car displayed a low oil level light between oil changes and after checking the dipstick it was low. No sign of visible oil leak so upon further research I was made aware of a TSB about defective valve seals causing excessive oil consumption. My cars VIN is in the affected range outlined in the..."

Incident Date: 06/24/2023 • Raw NHTSA Component: ENGINE
Engine & Cooling NHTSA ODI ID: #11521630
Filed: 05/12/2023

"Low oil light comes on. Using excessive oil between oil changes."

Incident Date: 05/12/2022 • Raw NHTSA Component: ENGINE
Consumer Narrative Notice: Excerpts are sanitized text descriptions submitted by vehicle owners to the federal ODI database. They reflect the reporting consumer's observations at the time of filing and have not been independently confirmed by vehicle manufacturers or government investigators.

Complaint History for Mazda Mazda6

Reported defect complaint volume across sibling model years (2015–2021)

Model Year NHTSA Complaints Crash Reports Safety Recalls Detailed Report
2015 Mazda Mazda6 60 6 3 View 2015 Problems →
2016 Mazda Mazda6 76 9 1 View 2016 Problems →
2017 Mazda Mazda6 60 1 1 View 2017 Problems →
2018 Mazda Mazda6 56 1 2 View 2018 Problems →
2019 Mazda Mazda6 6 0 1 View 2019 Problems →
2020 Mazda Mazda6 2 0 0 View 2020 Problems →
2021 Mazda Mazda6 Current Page 17 0 0 Current
Comparative Disclaimer: Complaint totals are unadjusted historical counts and are not normalized for vehicles sold, active fleet size, or total road mileage. Newer model years naturally have had less calendar exposure time to accumulate owner filings.

Detailed NHTSA Component Breakdown for 2021 Mazda Mazda6

Complete distribution of consumer defect reports across all 6 granular NHTSA system and subsystem classifications

Vehicle Component / System Total Complaints Crash Reports Fire Reports Reported Injury Entries Reported Fatality Entries
Engine NHTSA category: ENGINE 11 0 0 0 0
Visibility & Wipers NHTSA category: VISIBILITY/WIPER 2 0 0 0 0
Back Over Prevention / Camera NHTSA category: BACK OVER PREVENTION 1 0 0 0 0
ENGINE,FUEL/PROPULSION SYSTEM 1 0 0 0 0
Other / Uncategorized NHTSA category: UNKNOWN OR OTHER 1 0 0 0 0
UNKNOWN OR OTHER,ENGINE 1 0 0 0 0
Data Attribution & Reporting Methodology: Complaints are unverified voluntary submissions to the NHTSA Office of Defects Investigation (ODI). Because multiple vehicle components can be cited within a single owner complaint submission, component-level rollups may sum to more than the unique complaint count (17). Injury and fatality entries in the detailed table reflect raw values entered by reporting consumers across individual submissions; they are not deduplicated casualty statistics and may include duplicate or unverified entries. Complaint volume is not normalized for sales volume or vehicle mileage and does not represent an audited component failure rate.

Related Official Reports for 2021 Mazda Mazda6

Cross-reference safety recalls, crash test safety ratings, and EPA fuel economy for this model year

Official US Government Data Provenance

The complaint records on this page are retrieved directly from the NHTSA Office of Defects Investigation (ODI) public database.

Local Production Store Compiled: August 2026 • Deterministic Audited Dataset • Zero Dynamic External API Runtime Latency.