Battery boost for a 2018 Mazda CX-9
Battery boost for the 2018 Mazda CX-9: CarmaCars does not do this work itself. Request it and we arrange it with a trusted shop or connect you with one, and we can deliver a rental car to you while yours is in.
- Combined
- 9.6 to 10.4 L/100 km
- Body
- Small Sport Utility Vehicle

A rental while yours is in the shop
CarmaCars does not do this work; you keep driving while the shop has your car. We deliver a rental to you, by the day, at our usual rates.
The 2018 Mazda CX-9 for battery boost
- Body: small sport utility vehicle (EPA size class).
2018 Mazda CX-9: every figure
| Figure | Powertrain 1 | Powertrain 2 |
|---|---|---|
| Displacement | 2.5 L | 2.5 L |
| Cylinders | 4 | 4 |
| MPG city (US) | 22 | 20 |
| MPG highway (US) | 28 | 26 |
| MPG combined (US) | 24 | 23 |
| MPG combined (Imperial) (converted from the US figure) | 29 | 28 |
| Fuel cost a year (EPA) (EPA: 15,000 miles at its fuel prices) | US$2,800 | US$2,900 |
| Fuel cost for 20,000 km (at $1.55 a litre) | $2,976 | $3,224 |
Sources: fuel use, MPG, CO2, electric range, battery, charge time, luggage volume and the annual fuel cost are the US EPA's (fueleconomy.gov). Imperial MPG, litres, inches and pounds are converted from those figures. Figures no free source publishes for this car (power, torque, acceleration, top speed, fuel tank, towing) are left out.
What to check when buying the 2018 Mazda CX-9
- NHTSA lists 2 recall campaigns for this model year. Ask the seller for proof each one was fixed; a dealer can check it by the VIN.
- Owners filed 128 complaints with NHTSA, most often about engine (76), unknown or other (19) and electrical system (15). Have those parts checked before you buy.
| Campaign | Date | Component | Summary |
|---|---|---|---|
| 21V875000 | 2021-11-12 | fuel system, gasoline:delivery:fuel pump | Mazda North American Operations (Mazda) is recalling certain 2018 Mazda3, Mazda6, 2019 CX-3, 2018-2019 MX-5, CX-5, CX-9, and 2019-2020 Mazda2 vehicles. The impeller inside the low-pressure fuel pump may crack and deform, potentially causing the fuel pump to fail. |
| 19V403000 | 2019-05-30 | electrical system:wiring | Mazda North American Operations (Mazda) is recalling certain 2018 CX-9 vehicles. The wiring harness may disrupt electrical communications and disable the passenger frontal air bag, turn signals, and/or engine starting system. |
Source: NHTSA (US) recall campaigns and owner complaints for this model year.
Arranging the work for the CX-9
For battery service on the 2018 Mazda CX-9, a trusted shop does the work and CarmaCars arranges it, with a rental if you need one. A battery that struggles in the cold is often near the end of its life.
Details the shop needs
If you have the service history of your CX-9, have it ready for the shop. Tell the shop about any warning light or sound you have noticed. The shop sets its own price and time after it sees the car. Power: the 2.5L 4-cylinder turbo; drive: front-wheel drive.
The steps
The shop quotes the job; you approve it before any work. You agree the price with the shop before any work starts. We do not set the shop's price or promise a date.
A rental while you wait
A rental from us keeps you moving while the shop has your car. Add a rental to the same request as the repair. Collect the car at our location for free, or have it delivered.
Questions to ask the shop
Ask whether the quote includes both parts and labour. If the car must stay overnight, ask where it will be kept. Ask whether the shop needs your keys, the wheel lock key or the spare.
Car care, briefly
Keep an emergency kit in the trunk in winter. Have the cabin air filter changed on the maker's schedule. Do not ignore a warning light; an early check often costs less than a late repair.
Want a price?
Ask, and we tell you plainly what we can arrange.
Request battery boost
Tell us when suits you. A person replies within one business day and arranges it with a trusted shop or recommends one; the shop sets its own price and time.
Rent a car while yours is in in Toronto
We have no car while yours is in on the site right now. Request one and we look for it for your dates, or take a similar car that is available now.
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Tell us your dates and we look for a car while yours is in for you. Nothing is booked or charged.