2021 Mazda Mazda3: Is It Reliable?
Problems, Recalls & Buyer Verdict
Shopping for a used 2021 Mazda Mazda3? This page highlights owner-reported complaint patterns and recall history so you can inspect the right systems before buying. Current data includes 49 complaints, with Engine Problems as the top reported area.
2021 Mazda Mazda3 Safety Ratings
NHTSA 5-Star Program4 variants tested — showing 2021 Mazda Mazda3 5 HB AWDOfficial crash test results from the NHTSA 5-Star Safety Ratings program. Stars reflect government-conducted tests; higher is safer.
Overall
10.1% rollover risk
Frontal Crash
Side Crash
Rollover
10.1% probability
Source: NHTSA 5-Star Safety Ratings. Ratings are based on government crash tests and may not reflect all trim levels.
Based on NHTSA complaint data, the 2021 Mazda Mazda3 has 49 owner complaints, 2 crash-related complaints, and 1 recall campaign on record. The most frequently reported component is Engine Problems. NHTSA reliability signal: Severe Issues.
- Make
- Mazda
- Model
- Mazda3
- Model year
- 2021
- NHTSA owner complaints
- 49
- Crash-related complaints
- 2
- Safety recall campaigns
- 1
- Top reported component
- Engine Problems
- Reliability signal
- Severe Issues
- NHTSA overall safety rating
- 5/5 stars
- NHTSA frontal crash rating
- 5/5 stars
- NHTSA side crash rating
- 5/5 stars
- NHTSA rollover rating
- 5/5 stars
- Electronic stability control
- Standard
Most Common 2021 Mazda Mazda3 Problems
Top owner-reported complaint areas and where they often appear.
Engine Problems
Forward Collision Avoidance: AEB
Uncategorized Issues
Complaint patterns center on Engine Problems, Forward Collision Avoidance: AEB, Uncategorized Issues. Use these as a pre-purchase inspection guide, then verify recall and damage history on the specific VIN.
Should You Buy a Used 2021 Mazda Mazda3?
The 2021 Mazda Mazda3 shows higher complaint activity for its model-year profile, so buyers should inspect known problem areas carefully before purchase.
Use the model-year trend to shortlist candidates, then confirm the exact vehicle condition with service records, recall status, and a VIN history report.
What to Check Before Buying a Used 2021 Mazda Mazda3
Inspection Focus
- Inspect the engine for any reported issues, such as stalling or loss of power.
- Verify all open recalls at nhtsa.gov/recalls.
- Request service records for forward collision avoidance and electrical system repairs.
- Have a mechanic inspect the vehicle before purchase, focusing on reported components.
Before You Close the Deal
- Inspect the engine for any reported issues, such as stalling or loss of power.
- Verify all open recalls at nhtsa.gov/recalls.
- Request service records for forward collision avoidance and electrical system repairs.
- Have a mechanic inspect the vehicle before purchase, focusing on reported components.
Shortlist with model-year data. Decide with the exact VIN.
Before buying a used 2021 Mazda Mazda3, run a VIN history report to verify accidents, title brands, odometer records, theft checks, and open recalls for the exact vehicle.
What the Complaint Data Suggests
Editorial interpretation of NHTSA public complaint data. Source: nhtsa.gov. Complaints are owner-submitted and do not confirm a defect. Methodology
Complaints for the 2021 Mazda3 are concentrated in engine problems, with 18 reports. Forward collision avoidance and electrical faults also appear as recurring themes. Crash-related complaints are low at 2, but the overall confidence in this data is low due to limited sample size.
- Engine problems account for the highest number of complaints (18) among the 49 total.
- Forward collision avoidance (AEB) has 7 complaints, suggesting potential issues with the system.
- Electrical faults (6 complaints) and brake system (4 complaints) are also notable areas of concern.
- Engine Problems
- Forward Collision Avoidance: AEB
- Electrical Faults
All 2021 Mazda Mazda3 Complaints by Category
Every owner-reported complaint category filed with NHTSA for the 2021 Mazda Mazda3. Use this as a pre-purchase inspection checklist.
| Component | Complaints | Crashes | Fires | Avg Mileage | Volume |
|---|---|---|---|---|---|
| Engine Problems | 18 | — | — | — | |
| Forward Collision Avoidance: AEB | 7 | — | — | — | |
| Uncategorized Issues | 7 | — | — | — | |
| Electrical Faults | 6 | 1 | 2 | — | |
| Brake System | 4 | — | — | — | |
| Airbag Malfunctions | 4 | 1 | — | — | |
| Transmission / Drivetrain | 3 | — | — | — | |
| Lane Departure | 3 | — | — | — | |
| Unintended Acceleration | 2 | 1 | — | — | |
| Wheel Issues | 2 | — | — | — | |
| Structural Problems | 2 | — | — | — | |
| Fuel/Propulsion System | 2 | — | — | — | |
| Suspension Failures | 1 | — | — | — | |
| Steering Defects | 1 | 1 | — | — | |
| Seat Belt Issues | 1 | — | — | — |
Source: NHTSA Complaints Database. Complaint counts may exceed total complaints because one report can span multiple categories.
Real Owner Complaints
Read what owners actually reported to NHTSA for the 2021 Mazda Mazda3. Type a keyword (e.g. “transmission”, “stalling”, “brakes”) to filter.
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 going less than 30 mph if we had been on the highway when this happened we could have been in an accident or lost contro…
At 31,000 miles the control arm lower ball joints are torn on both lower. They must be replaced. This is a safety hazard. This should not be an issue with low mileage on this car.
I was driving when all the sudden there was a loud bang sound. The differential housing cracked. The when awd is demanded the rear diff was was locking up instead of engaging. Luckily we were just on city streets and not on the highway as this rear wheel locking up could cause a …
Spontaneous loss of power while driving on highway. Check engine light came on. Speed limited by car. Continues to vibrate especially at idle from cold start. Code P0304 intermittently popping up.
During the incident, the vehicle exhibited an uncontrollable malfunction—the steering wheel suddenly jerked sharply to the right while accelerating violently, leaving me unable to steer or brake effectively, the car was looking forward. The car ultimately came to a stop upon coll…
The thermostat malfunctioned on this vehicle, resulting in the thermostat remaining open and providing excess coolant to the engine, which in turn damaged internal components of the engine (compromises safety), decreased fuel economy, increased emissions (compromised safety), and…
When this feature is left on in my vehicle, it will detect curves, vehicles, and objects that are not there, and as a result, will attempt to turn my steering wheel (safety concern). I have had to keep this feature turned off to prevent it wrecking the car, because I could be on …
The driver window, upon attempted to be let up, will start to go up then go all the way down, ignoring the function to go up. This is a safety concern, as harsh temperatures and foreign objects are able to enter the vehicle cabin at any time, including driving. The problem has be…
The contact owns a 2021 Mazda Mazda3. The contact received notification of an unknown Class Action Lawsuit Number however, the part to do the repair was unavailable. The contact stated that the manufacturer exceeded a reasonable amount of time for the repair. The manufacturer was…
Radiators are failing 3 years after the warranty period. Its leading to coolant lost and perhaps overheating the engine.
My 2021 Mazda 3 was bought used in August 2023 and is about a year old in my possession. it has been at the Mazda dealership for repairs multiple times since August 2023. it dangerously stalls and hesitates when trying to accelerate from a stop position. When the brake pedal i…
Low oil light - car is burning oil and only has 11,400 miles. Approx 3/4 to 1 quart missing...
At red light, close behind car in front of the mazda. After light turns green, start driving the mazda after car in front moves forward. Although the car in front is moving forward at a higher rate of speed, increasing the distance between it and the mazda, the automatic emergenc…
While driving at a normal speed on a clear, sunny day with no other vehicles close by, I heard a loud crash sound and my car's sunroof unexpectedly shattered. The inside glass panel looks like it's shattered and it caused tiny glass shards to fall inside the vehicle onto my right…
Brakes are underpowered especially when hot. Drove 20-30 minutes in traffic and when decelerating from 60 mph highway in turn lane to turn into neighborhood the brakes felt very soft . Car only has 28k miles on it and pads have plenty of life left. Have seen similar complaints…
Driving on a remote highway in northern WI and low oil light illuminated, 1000 miles before oil change was due with less than 10k miles on the vehicle. Made it to a gas station and oil was a quart low. Vehicle burns over a quart every oil change interval, since this has been oc…
For the past 7 months (since July 2023) the passenger rear tire keeps loosing air pressure about every two weeks requiring more air. It always drops to 10 points below the other tires. The tires have been rotated twice so it is not a problem with the tire. I believe there is a re…
A bolt head underneath the car snapped for the steering mechanism. The problem was indicated by a clanking noise I heard for many 1000s of miles. It's been as long as I remember, but I had no idea what it really meant. It's 2.7 years old with 30,653 miles right now. There were no…
Part easily break away during washing. Fuel door cover lid panel (BDYT-42-411) broke in automatic car wash.
Received Low Oil Level warning ... checked engine oil and it is under the minimum level on the dip stick. Car has only 11,725 miles
Source: NHTSA Complaints Database. Real owner reports for the 2021 Mazda Mazda3.
2021 Mazda Mazda3 Recalls
1 campaignNHTSA recall campaigns for the 2021 Mazda Mazda3. 1 recall campaign is on record for this model year. Recalls are free to fix at authorized dealers, but completion status must be verified on the exact VIN.
2021 Mazda Mazda3 Buying FAQ
Buyer-focused answers based on real NHTSA complaint and recall data for this model year.
Is the 2021 Mazda Mazda3 reliable?▾
Severe Issues. NHTSA currently shows 49 owner complaints, 2 crash-related complaints, and 1 recall campaign for this model year. The 2021 Mazda Mazda3 shows higher complaint activity for its model-year profile, so buyers should inspect known problem areas carefully before purchase. Treat this as a model-year signal, then verify the exact vehicle's condition and history before purchase.
What are the most common problems with the 2021 Mazda Mazda3?▾
#1: Engine Problems (18 complaints). #2: Forward Collision Avoidance: AEB (7 complaints). #3: Uncategorized Issues (7 complaints)
At what mileage do problems start on the 2021 Mazda Mazda3?▾
Mileage data is not available or insufficient for this model year.
How safe is the 2021 Mazda Mazda3?▾
Complaint data is not the same as crash-test scoring, but it does highlight possible risk patterns. For the 2021 Mazda Mazda3, NHTSA complaints include 2 crash-related reports and 2 fire reports out of 49 total complaints. 1 injury reports are also on file. For controlled crash-test ratings, check nhtsa.gov/ratings.
Does the 2021 Mazda Mazda3 have any recalls?▾
Yes. 1 NHTSA recall campaign affect the 2021 Mazda Mazda3. A major recall area is TIRES:VALVE. 1 recall campaign is on record for this model year. Always verify open recalls by VIN because completion status varies by vehicle.
Should I buy a 2021 Mazda Mazda3?▾
The 2021 Mazda Mazda3 shows higher complaint activity for its model-year profile, so buyers should inspect known problem areas carefully before purchase. Use the model-year trend to shortlist candidates, then confirm the exact vehicle condition with service records, recall status, and a VIN history report. Pay extra attention to Engine Problems during inspection. Before committing, run a VIN history report to verify accidents, title brands, odometer records, and recall completion for the exact car.
Source: NHTSA (National Highway Traffic Safety Administration) complaint and recall databases, aggregated by VinSpector AI.
Wider context: See the full Mazda Mazda3 reliability report with year-by-year comparison.
Owner Reliability Rating
Rate the 2021 Mazda Mazda3 based on your ownership experience.
Add your rating:
Ratings are based on owner experience and are separate from NHTSA data shown above.
Check the Exact Vehicle History Before You Buy
Model-year complaints and recalls reveal patterns. A VIN report confirms whether the exact car has accident history, title brands, mileage issues, or open recalls.