2020 Mazda Cx-9 Used Car Review

The 2020 Mazda CX-9 is one of the most stylish 3 row SUVs you can buy used right now. It drives like a car, looks like a million bucks, and costs a fraction of what luxury brands charge for the same vibe. But there’s a specific engine problem you need to know about before you hand anyone a deposit.

This review is for families who want a premium-feeling 3 row SUV without the premium price tag, and for anyone who’s been comparing the CX-9 against rivals like the Toyota Highlander or Kia Sorento. Read this first.

Reliability and Common Issues

Let’s get straight to the thing everyone’s talking about on owner forums: the cracked cylinder head problem. The 2.5-liter turbo four-cylinder engine in the Mazda CX-9 has a well-documented issue where the cylinder head cracks, causing a coolant leak from the rear of the engine. It’s also prone to oil leaks. Mazda issued a technical service bulletin (TSB) in 2021 acknowledging the problem, but it never became a formal recall, and Mazda has largely relied on the 60,000-mile/5-year powertrain warranty to limit their exposure.

That matters a lot in the used market. A 2020 Mazda CX-9 with 80,000 or 90,000 miles has likely aged out of that warranty window. Buyers on Kelley Blue Book’s owner forum report buying CX-9s with high mileage only to have coolant leaks appear within weeks. Don’t assume a car that made it past 80k without issues is in the clear. It isn’t always.

Beyond the engine concern, Consumer Reports owner data flags air conditioning problems as a recurring theme. The AC compressor, evaporator, condenser, and blower motor have all shown up in owner complaints. Inconsistent cooling performance, refrigerant leaks, and electrical failures with the automatic climate system are all things real owners have reported. Summer driving can reveal these fast, so a summer test drive is your friend.

RepairPal gives the 2020 Mazda CX-9 a reliability rating of 3.5 out of 5, placing it fourth out of 16 in the full-size SUV class. That’s respectable, but the cylinder head issue pulls it down for higher-mileage examples specifically. According to the NHTSA recalls database, the 2020 CX-9 has one official recall on record. Always check that the recall work has been completed before buying any used vehicle.

The infotainment system, while elegant in design, has drawn some criticism for the rotary controller being slow to respond on older software versions. It’s not a dealbreaker, but worth testing on your test drive.

What to Inspect Before You Buy

Given what you now know about the engine, your pre-purchase inspection needs to focus hard on the powertrain. Here’s what to prioritize.

Start with the engine bay. Look for any signs of coolant residue or white staining around the rear of the engine. A fresh detail job can hide a lot, so push your mechanic to pressure-test the cooling system. If the seller is reluctant to allow a third-party inspection, walk away. An independent mechanic’s inspection on a CX-9 is non-negotiable, especially if it has over 60,000 miles.

On your test drive, run the AC hard for at least 15 minutes. You want consistent, cold air. If it cycles in and out or takes forever to cool the cabin, assume there’s a refrigerant or compressor issue and price it into your offer accordingly.

Test the turbo response. The 2.5-liter turbo produces solid torque low in the rev range, so you should feel confident, linear acceleration without hesitation or surging. Hesitation under load can point to turbo issues or boost leaks. Give the engine a proper workout during the test drive, not just a gentle cruise around the block.

Check the second row seat latches and sliding mechanisms. Three row SUVs take a lot of physical abuse from families, and the fold-and-tumble hardware can wear. Make sure all seats lock and release cleanly. Also check the cargo area: look for any signs of water intrusion around the rear hatch seal, and check the spare tire well for moisture.

The Mazda CX-9 has aluminum-intensive body panels that resist rust better than some rivals, but inspect the lower door sills and rocker panels on any example that’s spent time in salt-belt states. Run the car’s VIN through our free VIN lookup tool to check for accident history before you even book the test drive.

• Must-do: Independent mechanic inspection with a cooling system pressure test
• Must-do: AC function test for at least 15 minutes on a warm day
• Must-do: VIN history check for accidents, title brands, and service records
• Must-do: Confirm the one open NHTSA recall has been completed

2020 Mazda CX-9 Signature AWD and Trim Levels

The 2020 Mazda CX-9 came in four trims: Sport, Touring, Grand Touring, and Signature. All of them use the same 2.5-liter turbo four-cylinder, making 227 horsepower on regular fuel or 250 horsepower with premium. The torque figures stay the same at 310 lb-ft, but you’re leaving power on the table with regular.

The Signature trim is the top dog, and its style is genuinely impressive. You get Nappa leather, a ventilated driver’s seat, Japanese Sen wood trim, and a head-up display. If you want that near-luxury feel without the Toyota Venza price premium, the Signature hits hard. All-wheel drive is standard on Signature trims and optional on others. In the used market, look for AWD if you’re in a colder climate.

The Grand Touring is probably the sweet spot for most buyers. You get most of the premium features without paying top dollar for Signature. The driving experience in both trims is genuinely car-like, which is what separates the Mazda CX-9 from boxy alternatives in the segment.

Fuel Economy and Real-World Driving

According to EPA fuel economy data, the 2020 Mazda CX-9 AWD returns around 22 mpg combined (20 city, 26 highway). Front-wheel drive versions do slightly better. For a 3 row SUV with a turbo engine, that’s competitive. Toyota’s Highlander with a V6 gets similar numbers, so this isn’t a standout advantage, just a reassurance that you’re not paying gas-guzzler penalties.

Real-world driving tends to match the EPA estimate closely when the engine’s healthy. If you notice fuel consumption spiking without a change in driving habits, add that to the list of things for your mechanic to check.

Fair Price Range

On the used car market, a 2020 Mazda CX-9 typically lands somewhere between the mid-$20,000s and mid-$30,000s depending on trim, mileage, and condition. You’ll often see high-mileage Sport trims priced lower, while low-mileage Signature AWD examples can push toward the higher end of that range or above it.

Mileage is where pricing gets complicated on this car. Because of the cylinder head issue, a CX-9 with 90,000 miles should be priced meaningfully lower than one at 50,000 miles, even if both look clean. If a seller is asking near-new-replacement money for a high-mileage example, that’s a red flag. Price in the cost of a potential engine repair when you’re doing the math. Use our car loan calculator to make sure the monthly payment stays comfortable even if you need to budget for unexpected repairs.

Lower-mileage examples with a documented service history and proof the recall was completed command a premium for good reason. They’re worth paying for.

How Does It Compare to Rivals?

The most common comparisons are against the Toyota Highlander, Kia Sorento, and even the smaller Mazda CX-5 for buyers who don’t actually need three rows. The Toyota Highlander is the more proven long-term reliability choice, especially at higher mileage. But the 2020 Mazda CX-9 beats it on driving experience and interior style by a noticeable margin.

If you want something that genuinely feels good to drive every day, the Mazda wins. If you’re planning to run it past 120,000 miles and hate surprises, the Toyota might be a safer bet. That’s the honest tradeoff.

Is the 2020 Mazda CX-9 Worth Buying Used?

For the right buyer at the right mileage, yes. The 2020 Mazda CX-9 is genuinely one of the best-driving 3 row SUVs available used right now. The cargo space is practical, the second row is comfortable, and the driving experience puts most rivals to shame. You get near-luxury style at a mainstream price.

But this is not a car to buy blind. The cylinder head issue is real, it’s documented, and it can be expensive to fix if it surfaces out of warranty. Stick to examples with under 70,000 miles if you can, get that independent inspection done, and factor in the potential repair cost when negotiating.

This SUV is best for families who want something premium-feeling for school runs and road trips, and who are willing to buy smart rather than just buy cheap. If you want the lowest-risk used buy in the segment and you’re planning to keep it past 100k miles, look harder at the Toyota Highlander first. But if the driving experience and style matter to you as much as practicality, the CX-9 rewards buyers who do their homework.

Get the inspection done, check the VIN, and test drive it hard. The 2020 Mazda CX-9 can be a fantastic used buy, but only if you go in with your eyes open.