Used 2021 Mazda CX-30 for Sale nearSaint Louis, MO

How much does the 2021 Mazda CX-30 cost?

Prices have softened 5.12% compared to this time last year, making it a favorable time to shop this model year.

There are 906 listings available, which suggests you have a workable amount of inventory to compare.

Is the 2021 Mazda CX-30 a good car?

Yes — the 2021 Mazda CX-30 earns a 4.77/5 user rating and a 7.5/10 expert rating. The standout strength is Safety at 9/10.

Owners consistently praise its sporty design, interior quality, and driving dynamics, and many also like the luxury feel at an affordable price. The CX-30’s use-case appeal is clear if you want a stylish small crossover that feels more upscale than many mainstream rivals without moving into traditional luxury-brand pricing. Trade-offs include limited back-seat legroom and a desire for more USB ports, while the expert review also points to poor handling and poor visibility.

With 34.3% of listings marked as good or great deals, you have some room to shop selectively.

Is the 2021 Mazda CX-30 reliable?

Owners rate it 4.77/5, a strong signal of long-term satisfaction.

The owner feedback points to a vehicle people feel good about keeping, with praise for its sporty design, interior quality, and driving dynamics. That kind of satisfaction usually lines up with a car you can count on over time, especially when the ownership experience feels polished and confidence-inspiring. The expert review also emphasizes a refined, sophisticated character rather than a raw or fragile one, which supports the impression of dependable everyday use.

For used buyers, the main long-term ownership risk is less about outright durability and more about whether the specific example has been maintained well and still feels as tight and composed as intended.

What should I look for when buying a used 2021 Mazda CX-30?

Accident-free inventory is solid at 75.9% — always verify the vehicle history report.

You should still run a history report on any candidate, even if it looks clean on paper. Prioritize a pre-purchase inspection that checks for signs of prior damage, uneven wear, and any issues that could affect ride quality or visibility. Focus on condition details that matter in daily use, especially interior wear, cabin functionality, and whether the vehicle still feels well sorted on the road.

Key things to evaluate:

• Trim level: The standard setup emphasizes upscale materials and a premium vibe, while Premium and Premium Plus add more luxury-oriented equipment. Base-spec shoppers should pay attention to feature gaps if they want the richer cabin experience.
• Powertrain: The turbocharged 2.5-liter four-cylinder pairs with a six-speed automatic and standard i-Activ all-wheel drive. Output varies with fuel octane, and the setup is tuned for strong response and satisfying acceleration rather than hardcore performance.
• Safety package: Every CX-30 Turbo includes i-ActiveSense advanced driver-assistance systems, plus mobile 9-1-1 automatic emergency notification. Premium trim adds adaptive front lighting, while Premium Plus adds front and rear parking sensors, rear automatic braking, a surround-view camera system, and Traffic Jam Assist.
• Infotainment: The cabin centers on an 8.8-inch display that is not a touchscreen. Standard Apple CarPlay and Android Auto are included, and Mazda Connected Services adds remote engine start and vehicle-finder functions.
• Fuel efficiency: The turbo model is rated at 25 mpg in combined driving, and the review notes an observed average of 24.1 mpg.

Which 2021 Mazda CX-30 trim should I buy?

The 2021 Mazda CX-30 is offered in 3 trim levels: CX-30 Turbo, Premium, Premium Plus.

Here's the short version:

• CX-30 Turbo: This is the entry point, but it still brings the turbocharged engine, standard all-wheel drive, and the core upscale feel that defines the model. It makes sense if you want the powertrain and premium character without paying for the extra luxury features.
• Premium: This trim adds the adaptive front lighting system and brings in more comfort and convenience equipment, including the upgraded audio and navigation features. It’s the best-value choice if you want a more complete luxury-like experience without going all the way to the top trim.
• Premium Plus: This is the most fully equipped version, adding front and rear parking sensors, rear automatic braking, a surround-view camera system, and Traffic Jam Assist. Choose it if you want the most advanced convenience and safety tech in the lineup.

Every CX-30 Turbo includes i-ActiveSense, and Premium Plus adds the most complete safety and parking package.

Is now a good time to buy a used 2021 Mazda CX-30?

This looks like a moderate, selective buyer’s market, so you can shop carefully and still find worthwhile listings.

• Deal availability: 34.3% of listings are priced as good or great deals.
• Inventory: There are 906 listings available.
• Price trend: Prices have softened 5.12% compared with last year.
• Clean inventory: 75.9% of listings are accident-free.

If you find a listing below $19,027, that's toward the low end of the year-round range and worth acting on quickly.

What is the 2021 Mazda CX-30's resale value?

The current average of $19,351 sits slightly below last year's $20,396.

That decline suggests the market has already adjusted downward, which can help you buy more confidently now. For a future seller, the key implication is that resale value may depend heavily on condition, mileage, and how well the vehicle is equipped, since buyers will compare it against a softer market baseline. A well-kept example with the right features should still attract attention, but you should expect pricing discipline from shoppers.

Vehicles with strong owner satisfaction ratings, like this model year's 4.77/5, tend to retain buyer demand, which supports resale value over time.

Is the 2021 Mazda CX-30 safe?

The Mazda CX-30 Turbo earned a Top Safety Pick+ rating from the Insurance Institute for Highway Safety (IIHS), and it earns five-star ratings in every NHTSA assessment except rollover resistance, where it receives a four-star rating.

It earns a 9/10 safety score from our experts.

Mazda equips every CX-30 Turbo with i-ActiveSense advanced driver-assistance systems, and the suite is described as effective without being irritating. Standard equipment also includes mobile 9-1-1 automatic emergency notification. Premium trim adds adaptive front lighting, while Premium Plus adds front and rear parking sensors, rear automatic braking, a surround-view camera system, and Traffic Jam Assist. One caveat is that there is no high-speed lane-centering assistance function.

Should I buy a 2021 Mazda CX-30 or consider a different year?

If you're weighing the 2021 against nearby model years, here's how to think about it:

Choose the 2021 if:

• 34.3% of listings are priced as good or great deals.
• Accident-free inventory is solid at 75.9% — always verify the vehicle history report.
• Price trend: Prices have softened 5.12% compared with last year.
• Owners rate it 4.77/5 — a strong satisfaction signal.
• It blends upscale design, strong safety, and premium-feeling tech into a small crossover package.

Consider the 2020 if:

• At $18,676, the 2020 costs less than the current year's $19,351 average.
• It offers extra ground clearance and easier entry and exit.

Consider the 2022 if:

• At $22,220, the 2022 costs more than the current year's $19,351 average.
• It brings a more upscale cabin and a more spacious feel.

The bottom line: The 2021 is the right pick if you want the strongest mix of value, safety, and upscale character in this range. If price is your top priority, the 2020 is the better budget play; if you want a newer-feeling cabin and can spend more, the 2022 is worth a look.

These recommendations are based on CarGurus' proprietary market data from October 6, 2026, CarGurus experts' opinions, and generative AI.