Last updated: 2026-08-24

KIA Niro vs Mazda CX-30: Reliability Compared

More ReliableKIA Niro reliability comparison

KIA Niro

80
ExcellentReliability score: 80 out of 100, rated Excellent
VS
Mazda CX-30 reliability comparison

Mazda CX-30

67
GoodReliability score: 67 out of 100, rated Good

Choosing between the KIA Niro and the Mazda CX-30? This page compares their reliability scores, NHTSA recall history, owner-reported complaints, and estimated annual repair costs so you can make a confident long-term ownership decision between these two compact suvs.

Our reliability scores are based on NHTSA recall and complaint data, independent repair cost estimates, and sales-normalized complaint rates. The KIA Niro currently leads with an average score of 80/100 compared to 67/100. Scroll down for the full year-by-year breakdown, common problem areas, and repair cost comparison.

How Do the KIA Niro and Mazda CX-30 Generations Compare?

As of 2026, the Mazda CX-30 is in its first generation (DM), which spanned from 2020 to 2024. This model is relatively mature, with its production cycle completed, suggesting that most initial issues would have been addressed, potentially enhancing its reliability. In contrast, the KIA Niro is in its second generation (SG2), introduced in 2023, with a facelift in 2026. Being early in its generation cycle, the Niro might experience typical first-year issues as the new platform and features are refined. Generally, mature platforms like the CX-30 tend to be well-sorted, while newer models like the Niro may still be ironing out early production bugs.

Verdict

The KIA Niro is more reliable than the Mazda CX-30, scoring 80/100 vs 67/100.

The KIA Niro outshines the Mazda CX-30 in terms of reliability, with a higher average reliability score of 80/100 compared to the CX-30's 67/100. The Niro also has a lower owner complaint rate of 4.1 per 10,000 sold versus the CX-30's 5.7, and significantly fewer recalls—2 over its 2-year span compared to the CX-30's 10 over 7 years. While the CX-30 faces a range of issues including engine and electrical system problems, the Niro's primary concerns are in the electrical system and suspension, but with an estimated annual repair cost of $471, it remains a more cost-effective choice. Overall, the KIA Niro offers a more reliable and economically sound option for compact SUV buyers.

Key Differences

  1. 1KIA Niro scores 13 points higher in reliability
  2. 2KIA Niro has 8 fewer total recalls
  3. 3KIA Niro has 1.6 fewer complaints per 10k sold

Category Scoreboard

3KIA Niro
—
1Mazda CX-30
Reliability ScoreTotal RecallsComplaint RateSafety Rating

KIA Niro vs Mazda CX-30: Which Is More Reliable?

KIA Niro vs Mazda CX-30 at-a-glance reliability comparison
MetricKIA NiroMazda CX-30
Reliability Score80/10067/100
Years Tracked27
Total Recalls210
Complaints per 10k Sold4.15.7
Safety RatingNHTSA overall
2025 NHTSA
2026 NHTSA
Frontal
Side
Rollover
Year Wins20

What Are the Common Problems With the KIA Niro and Mazda CX-30?

The Mazda CX-30 exhibits a higher number of total complaints compared to the KIA Niro, with significant issues reported in the engine, electrical system, and service brakes. Notably, the CX-30 has several crash-linked complaints, particularly in service brakes (6 crash-linked) and air bags (4 crash-linked), indicating potential safety concerns. In contrast, the KIA Niro has fewer overall complaints, with the majority clustered in the "unknown or other" category and minimal crash-linked incidents, primarily related to the electrical system and forward collision avoidance. The CX-30's broader range of reported issues, especially those linked to crashes, suggests a more complex reliability profile compared to the Niro's more focused and less severe problem areas.

KIA Niro vs Mazda CX-30 common problem areas comparison
ComponentKIA NiroMazda CX-30
UNKNOWN OR OTHER1.5Low0.7Very Low
ELECTRICAL SYSTEM0.5Very Low0.8Very Low
ENGINE—None1.2Low
FORWARD COLLISION AVOIDANCE0.3Very Low0.2Very Low
SUSPENSION0.3Very Low0.1Very Low
SERVICE BRAKES—None0.4Very Low
AIR BAGS—None0.3Very Low
VISIBILITY/WIPER—None0.3Very Low
POWER TRAIN—None0.3Very Low
VEHICLE SPEED CONTROL—None0.2Very Low
STEERING—None0.1Very Low
LANE DEPARTURE—None0.1Very Low
STRUCTURE—None0.1Very Low
WHEELS—None0.1Very Low
SEATS—None0.1Very Low

Complaints per 10,000 units sold, aggregated across all tracked model years from NHTSA owner reports.

Which Is Cheaper to Maintain: KIA Niro or Mazda CX-30?

Based on industry estimates, the KIA Niro has an annual repair cost of $471, with a repair frequency of approximately 0.4 visits per year. Unfortunately, specific data for the Mazda CX-30's repair costs and frequency are unavailable, making a direct comparison challenging. However, the KIA Niro's relatively low repair frequency suggests it could be a reliable choice for cost-conscious buyers, potentially leading to fewer disruptions and lower maintenance expenses over time. While major repair risk data is not provided for either vehicle, the KIA Niro's established repair cost details offer a clearer picture of ownership expenses. Over five years, the Niro's repair costs would amount to approximately $2,355. Without comparable data for the Mazda CX-30, the KIA Niro appears to offer better value for those prioritizing predictable maintenance expenses.

How Does KIA Niro vs Mazda CX-30 Reliability Compare by Year?

KIA Niro vs Mazda CX-30 year-by-year reliability scores
YearKIA NiroMazda CX-30Edge
202580/1001R / 16C68/1001R / 22CKIA Niro
202479/1001R / 9C68/1002R / 23CKIA Niro

Best years to cross-shop: The 2025 KIA Niro scored 80/100 and the 2025 Mazda CX-30 scored 68/100 — these represent the strongest model years in our tracking range.

Who Should Buy the KIA Niro vs the Mazda CX-30?

If you prioritize reliability and lower long-term costs, the KIA Niro is a strong contender. With a reliability score of 80/100, only two recalls, and fewer owner complaints (4.1 per 10,000 sold), it stands out as a dependable choice. The estimated annual repair cost of $471 and a low repair frequency of 0.4/year further enhance its appeal for those looking to minimize unexpected expenses. On the other hand, if you are drawn to the Mazda CX-30 for its features or driving experience, be prepared for some potential challenges. With a lower reliability score of 67/100 and more frequent recalls (10 total), you might face more issues, particularly with the engine and electrical system. However, if these factors are less of a concern and you prioritize other aspects of the vehicle, the CX-30 could still be a viable option.

KIA Niro vs Mazda CX-30: Common Questions

Is the KIA Niro more reliable than the Mazda CX-30?
Based on our data, the KIA Niro is more reliable with an average score of 80/100 compared to 67/100. The difference is modest, so both are reasonable choices.
Which has more recalls, the KIA Niro or the Mazda CX-30?
The Mazda CX-30 has more recalls (10) compared to the KIA Niro (2). More recalls don't always mean worse reliability — some are minor — but it's worth reviewing what each recall covers.
Which has fewer owner complaints, the KIA Niro or the Mazda CX-30?
Adjusted for sales volume, the KIA Niro has a lower complaint rate at 4.1 per 10,000 vehicles sold versus 5.7 for the Mazda CX-30. Normalizing by sales gives a fairer comparison than raw totals.
Is the KIA Niro or Mazda CX-30 safer?
Based on NHTSA crash test ratings, the Mazda CX-30 has a higher overall safety rating of 5/5 stars compared to 4/5 for the KIA Niro. Check sub-ratings (frontal, side, rollover) above for a more detailed safety comparison.

Related Reliability Comparisons

Decided between KIA Niro and Mazda CX-30? Run a VIN check before you buy — uncover hidden accidents, title issues, and open recalls.

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How We Calculate Reliability Scores

Auto Reliability Index scores are calculated on a 0–100 scale using a weighted formula that combines multiple public data sources. Each factor is weighted based on its predictive value for real-world ownership experience.

Key Ranking Factors

1

Complaint Severity

NHTSA owner complaints weighted by component category (e.g., powertrain, safety systems, electronics, cosmetic) — safety-critical issues carry more weight than cosmetic ones. Adjusted for sales volume so high-volume models aren't unfairly penalized.

2

Repair Costs

Independent reliability ratings based on repair frequency, average repair costs, and severity of typical repairs for each model.

3

Recall Impact

Number of NHTSA recalls weighted by severity. “Stop driving” and fire-risk recalls are penalized more heavily than minor software or labeling recalls.

4

Issue Diversity

Measures how many major vehicle systems (engine, transmission, electrical, braking, etc.) have recorded complaints. A vehicle with issues spread across many systems may indicate systemic quality issues.

Scores are grouped into four tiers:

  • 80–100: Excellent— Top-tier reliability, minimal issues
  • 60–79: Good— Reliable with some minor concerns
  • 40–59: Mixed— Notable issues, research before buying
  • 0–39: Risky— Significant problems, proceed with caution

Data is sourced from NHTSA recall records, owner complaint filings, and independent repair databases via vehicles.dev. Scores are recalculated as new data becomes available. While the weighting model is proprietary, all underlying data sources are public and traceable.

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