Mazda Service for CX-5, Mazda3, CX-50, and CX-90

Mostly compact and midsize SUVs, plus the Mazda3.

• CX-5: the most common Mazda we see, a family and commuter SUV.
• CX-30 and CX-50: smaller crossovers, the CX-50 with a more rugged setup.
• CX-70 and CX-90: larger SUVs with newer engines and an eight-speed automatic.
• Mazda3: sedan and hatchback commuter.
• MX-5 Miata: two-seat roadster.

Body-style pages add detail: compact SUVs and coupes and compact cars.

Usually a low-viscosity synthetic such as 0W-20, but check the cap and manual, since turbocharged and newer engines may differ. Skyactiv gas engines use high compression, and they are designed around the listed oil.

Good habits for Skyactiv engines:

1. Change oil on the schedule or when the reminder appears.
2. Check the level between changes, especially on turbo models.
3. Use the listed viscosity; thicker oil is not a fix for noise.
4. Keep the air filter clean; these engines are sensitive to airflow.

We confirm the grade by VIN and note it on the invoice. See oil changes.

Most do not. Mazda has stuck with conventional automatic transmissions, which is unusual in the compact class. Many models use a six-speed automatic, and the larger CX-70 and CX-90 use an eight-speed. The MX-5 and some Mazda3 trims offer manuals.

Fluid type matters on all of them. See transmission service.

The i-stop system shuts the engine off at stops and restarts it when you release the brake. That puts more cycles on the battery than a normal car, so Mazda specifies a battery type built for it. A standard battery can wear out quickly and may keep i-stop from working.

If i-stop stops working or a warning appears, a weak battery is a common cause. We load-test the battery, confirm the correct type for your car, and reset what the system needs where our equipment supports it. More on battery replacement.

Keep the alignment in spec and the tires fresh. Mazda tunes its steering to feel precise, so a small toe change or worn tire is easy to notice. A pull, a vague center feel, or new noise are all clues.

What we check:

• Alignment readings with a printout.
• Tire wear pattern at each rotation.
• Sway bar links and strut mounts for clunks.
• Tire choice: touring tires for comfort, performance tires for grip, each with tradeoffs.

Some Mazdas use driver-assist cameras and radar. After an alignment we tell you if your model's guidance calls for a system check. See wheel alignment.

It depends on the drivetrain and the model. Mazda's i-ACTIV all-wheel drive, common on the CX-5, CX-30, and CX-50, watches wheel speed closely, so four tires of matching size and similar tread keep it happy. The MX-5 is rear-wheel drive and prefers tires chosen for grip and balance.

Tips that apply to all of them:

• Placard pressure: Mazdas can feel nervous at low pressure.
• Rotation: on schedule, with tread depth recorded.
• Replacement: matching the original size keeps speedometer and stability control accurate.

We pick the rotation pattern based on your drivetrain and tire type.

Front brakes, strut mounts, and links are the usual suspects. Many newer Mazdas have an electronic parking brake, which needs a service procedure before rear pad work. Skipping that step can damage the caliper motor.

Wear clues:

1. A clunk over speed bumps points to sway bar links or strut mounts.
2. A grinding stop means pads are down to metal.
3. A pull to one side can be alignment, a sticking caliper, or a tire.
4. A hum that changes with speed often means a wheel bearing or cupped tires.

Some newer inline-six models use a mild-hybrid system. We check the 12-volt side and tell you before any work that needs specialist tools. Bring the wheel lock key and your service history to your visit.