2018 Mazda CX-9: Recalls, Problems & MPG
Here are the deets on the 2018 Mazda CX-9: 2 recalls, 128 owner complaints and up to 24 mpg combined.
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Recalls
2 vehicle recalls from the manufacturer. Repairs are free. Check your VIN to see if one is still open on your car.
Electrical Vehicle recall #19V403000 · 2019 · 7,854 vehicles
What's wrong: The wiring harness May disrupt electrical communications and disable the passenger frontal air bag, turn signals, and/or engine starting system.
Why it matters: The passenger frontal air bag May not deploy, increasing the risk of injury. Inoperable turn signals prevent the driver from signaling to other drivers, increasing the risk of crash.
The fix: Mazda will notify owners, and dealers will repair the wiring harnesses, free of charge. The recall began July 26, 2019.
Fuel system Vehicle recall #21V875000 · 2021 · 121,038 vehicles
What's wrong: The impeller inside the low-pressure fuel pump May crack and deform, potentially causing the fuel pump to fail.
Why it matters: Fuel pump failure May cause an engine stall, increasing the risk of a crash.
The fix: Dealers will replace the fuel pumps, free of charge. Owner notification letters were mailed July 18, 2022.
Most-reported problems
Owner complaints filed with NHTSA, by component. One complaint can list several components. 1 mention a fire, 2 injuries and 0 deaths were reported.
What owners describe
- Engine (76): the most common themes are leaks (55), overheating (30), warning light on (7).
- Other / unknown (19): no single recurring theme in the descriptions.
- Electrical (15): the most common themes are electrical failure (6), fire / smoke (2).
- Transmission & drivetrain (13): the most common themes are leaks (9), warning light on (2).
The 2018 Mazda CX-9 has 128 owner complaints, ranking #5 of 17 CX-9 model years for complaints (about average; the typical year has 88). Complaints peaked in 2023 (39 filed that year). The typical problem showed up when the car was about 5 years old, at a median of 27,000 miles. Neighboring years: 2017 (61 complaints, 0 recalls), 2019 (53 complaints, 2 recalls).
Engines & fuel economy (EPA)
| Engine | Transmission | Drive | City | Hwy | Comb. | Fuel |
|---|---|---|---|---|---|---|
| 2.5 L 4-cyl turbo | Automatic (S6) | Front-Wheel Drive | 22 | 28 | 24 | Regular |
| 2.5 L 4-cyl turbo | Automatic (S6) | 4-Wheel Drive | 20 | 26 | 23 | Regular |
Want the full repair deets? Get the factory manual.
Recall and complaint data tells you what goes wrong. A service manual tells you how to fix it: torque specs, wiring diagrams, fluid capacities and step-by-step procedures for the 2018 Mazda CX-9.
Closest thing to the factory manual for most years. Pay once, keep it.
Most $25–$78, one-timePro-shop repair procedures, wiring diagrams and TSBs for your exact car.
From $19.99/mo · $39.99/yrOEM procedures, specs and recall/TSB info, the same source many shops use.
From $19.99/mo · $59.99/yrStep-by-step photos written from a real teardown. Great for first-timers.
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FAQ
Does the 2018 Mazda CX-9 have any recalls?
Yes. NHTSA lists 2 vehicle recalls for the 2018 Mazda CX-9. Recall repairs are free at any dealer, no matter how old the car is. Check your VIN at nhtsa.gov/recalls.
What are the most common 2018 Mazda CX-9 problems?
Owners have filed 128 complaints with NHTSA. The most-reported areas are engine (76), other / unknown (19), electrical (15).
What gas mileage does the 2018 Mazda CX-9 get?
EPA ratings run up to 24 mpg combined (2.5 L, Automatic (S6)), across 2 engine and transmission combos.
Where can I get a 2018 Mazda CX-9 repair manual?
eManualOnline sells downloadable manuals, Mitchell 1 DIY and ALLDATAdiy sell online access to factory repair data, and Haynes sells printed guides and online access. Pick a download if you want to keep it, or a subscription for wiring diagrams and TSBs.