2015 Mazda CX-9: Reliability, Recalls, Known Issues & Cost to Own

Data last updated 2026-07-04 · sources listed throughout · based on public NHTSA data

Most refined first-generation CX-9 with the lowest complaint count of its era. Strong V6 and sporty handling, but the water-pump coolant-into-oil failure remains the key risk on any example. 4 known issue patterns are documented below, with frequency and the mileage windows where they typically appear. New, the 2015 Mazda CX-9 ranged from $29,985 to $35,035 depending on trim (base MSRP, before options and destination).

6/10

Mixed track record

Most refined first-generation CX-9 with the lowest complaint count of its era. Strong V6 and sporty handling, but the water-pump coolant-into-oil failure remains the key risk on any example.

Sources (3)

api.nhtsa.govhttps://api.nhtsa.gov/complaints/complaintsByVehicle?make=mazda&model=cx-9&mo…
repairpal.comhttps://repairpal.com/reliability/mazda/cx-9
samarins.comhttps://www.samarins.com/reviews/mazda_cx9.html

Known issues

Brake booster and master cylinder can fail, causing a sudden hard brake pedal and loss of power assist. Heavily reported on 2010-2012 cars.

commonly reported · 300 NHTSA complaints · typically 40k–120k miles · brake
Internally driven water pump can leak coolant into the engine oil, destroying the engine with little or no external warning. The defining reliability risk of this generation.

commonly reported · 70 NHTSA complaints · typically 60k–130k miles · engine
Front lower control arms and suspension components corrode and can separate in salt-belt climates; some owners report wheel shimmy and clunks.

occasional · 75 NHTSA complaints · typically 60k–160k miles · suspension
Automatic transmission and AWD complaints: harsh or jerky shifts and intermittent loss of all-wheel-drive engagement.

occasional · 40 NHTSA complaints · typically 70k–150k miles · transmission

Based on public NHTSA complaint data and AI synthesis: patterns, not guarantees.

Sources (3)

api.nhtsa.govhttps://api.nhtsa.gov/complaints/complaintsByVehicle?make=mazda&model=cx-9&mo…
api.nhtsa.govhttps://api.nhtsa.gov/complaints/complaintsByVehicle?make=mazda&model=cx-9&mo…
api.nhtsa.govhttps://api.nhtsa.gov/complaints/complaintsByVehicle?make=mazda&model=cx-9&mo…

Recalls & safety

Recall history hasn't been loaded for this model year yet.

Whether a recall is still open on a specific car depends on its VIN. Check it free at NHTSA's VIN lookup (nhtsa.gov/recalls), or ask the seller for proof the repair was done.

Pros & cons

Pros

Sporty, composed handling and steering that stand out among older large SUVs.
Smooth, strong 3.5L/3.7L V6 with respectable acceleration and up to ~3,500 lb towing.
Roomy interior with a relatively easy-to-access third row for the era.
Attractive, well-aged styling and strong value on the used market.

Cons

Thirsty V6 with roughly 17 mpg combined, well behind modern rivals.
Water-pump design can leak coolant into the oil and cause catastrophic engine failure if not caught early.
Brake booster and master-cylinder failures, most common on 2010-2012 models.
Dated infotainment and tech, and salt-belt suspension corrosion on higher-mileage cars.

Trims & original pricing

Trim	Original base MSRP	New today	Engine	MPG
Sport	$29,985	discontinued	—	—
Touring	$32,480	discontinued	—	—
Grand Touring	$35,035	discontinued	—	—

Prices are base MSRP for each trim's standard configuration. Options, packages, and destination charges added to what original buyers actually paid.

Sources (1)

iseecars.comhttps://www.iseecars.com/car/2015-mazda-cx__9-price

Cost to own

Repairs (rises with mileage)	≈ $500–550/yr
Expected lifespan	~250k miles

National-average estimates based on public data. Your costs vary by region, driver, and condition.

Sources (1)

repairpal.comhttps://repairpal.com/reliability/mazda/cx-9

Frequently asked questions

What problems does the 2015 Mazda CX-9 have?

Documented issue patterns include: Brake booster and master cylinder can fail, causing a sudden hard brake pedal and loss of power assist. Heavily reported on 2010-2012 cars; Internally driven water pump can leak coolant into the engine oil, destroying the engine with little or no external warning. The defining reliability risk of this generation; Front lower control arms and suspension components corrode and can separate in salt-belt climates; some owners report wheel shimmy and clunks; Automatic transmission and AWD complaints: harsh or jerky shifts and intermittent loss of all-wheel-drive engagement. Frequency is based on public NHTSA complaint data: patterns, not guarantees.

Is the 2015 Mazda CX-9 reliable?

Most refined first-generation CX-9 with the lowest complaint count of its era. Strong V6 and sporty handling, but the water-pump coolant-into-oil failure remains the key risk on any example.

How much did the 2015 Mazda CX-9 cost new?

Between $29,985 and $35,035 depending on trim. Those are base MSRPs for each trim's standard configuration; options, packages, and destination charges added to what original buyers actually paid.

Is the Mazda CX-9 expensive to maintain?

Estimated repairs run roughly $500–550/year as mileage climbs.

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Estimates are based on public data: patterns, not guarantees. CarVitals is not affiliated with NHTSA, CarMax, AutoTrader, or Cars.com. Issue frequencies come from public NHTSA complaint data, which has no denominator, so they describe reporting patterns, not failure probabilities. Always have a used car inspected before buying. How we build these reports.