2021 Mazda CX-9 Fuses and Fuse Box | How to change fuse
Fuse box system organization is a key component of the 2021 Mazda CX-9’s electrical circuit protection strategy. To provide complete protection, the vehicle usually has two major fuse box locations: one in the engine compartment and another inside the interior cabin. These fuse boxes contain a variety of fuses, such as blade-type and small blade-type fuses, each of which is intended to protect a particular class of electrical equipment. A blown fuse will stop the circuit in the event of an electrical overload or short circuit, protecting the car’s systems from harm. Maintaining and preserving the smooth operation of the CX-9’s electrical functions requires routine inspections and the ability to repair blown fuses.
2023 MAZDA CX-9 Specs, Price, Features, Mileage (Brochure)
Fuses
Your vehicle’s electrical system is protected by fuses. If any lights, accessories, or controls do not work, inspect the appropriate circuit protector. If a fuse has blown, the inside element will be melted. If the same fuse blows again, avoid using that system and consult an Authorized Mazda Dealer as soon as possible.
Fuse Replacement
Replacing the fuses on the vehicle’s left side If the electrical system does not work, first inspect the fuses on the vehicle’s left side.
- Make sure the ignition is switched off, and other switches are off.
- Open the fuse panel cover.
- Pull the fuse straight out with the fuse puller provided on the fuse block located in the engine compartment.
- Inspect the fuse and replace it if it is blown.
- Insert a new fuse of the same amperage rating, and make sure it fits tightly. If it does not fit tightly, have an expert install it. Consult an Authorized Mazda Dealer. If you have no spare fuses, borrow one of the same rating from a circuit not essential to vehicle operation, such as the AUDIO or OUTLET circuit.
CAUTION
Always replace a fuse with a genuine Mazda fuse or equivalent of the same rating. Otherwise you may damage the electric system. - Reinstall the cover and make sure that it is securely installed.
Replacing the fuses under the hood
If the headlights or other electrical components do not work and the fuses in the cabin are normal, inspect the fuse block under the hood.
If a fuse is blown, it must be replaced. Follow these steps:
- Make sure the ignition is switched off, and other switches are off.
- Remove the fuse block cover.
- If any fuse but the MAIN fuse is blown, replace it with a new one of the same amperage rating.
WARNING
Do not replace the main fuse by yourself. Have an Authorized Mazda Dealer perform the replacement: Replacing the fuse by yourself is dangerous because the MAIN fuse is a high current fuse. Incorrect replacement could cause an electrical shock or a short circuit resulting in a fire. - Reinstall the cover and make sure that it is securely installed.
2023 MAZDA CX-9 Specs, Price, Features, Mileage (Brochure)
Fuse Panel Description
Fuse block (Engine compartment)
Fuse block (Left side)
FAQs
The fuse box houses electrical fuses that protect various circuits in the vehicle from electrical overloads or short circuits.
The CX-9 typically has two primary fuse box locations: one in the engine compartment and another inside the cabin for comprehensive circuit protection.
The fuse box contains various types of fuses, including blade-type fuses and mini blade-type fuses, each serving specific functions.
Fuses may need replacement if they blow due to an electrical fault, protecting your vehicle’s systems from potential damage.
A blown fuse can often be identified by a visible break or a burnt-out filament inside the fuse. A healthy fuse should have a continuous filament.
No, it’s not recommended to use a fuse with a higher amperage rating, as it can lead to electrical system damage.
Some 2021 CX-9 models may include spare fuses stored within the fuse box or in a designated location.
Regularly inspect the fuses if you encounter electrical issues or as part of routine vehicle maintenance to ensure they are in good condition.
While aftermarket fuses may be compatible, it’s recommended to use genuine or high-quality replacement fuses matching for proper protection.
If a newly replaced fuse keeps blowing, it may indicate an underlying electrical issue. Consult a professional technician for diagnosis and repair.
To access the engine compartment fuse box, open the vehicle’s hood and locate the fuse box cover. Remove the cover to access the fuses.
The appearance and layout of the fuse box are typically standardized and not customizable. They are designed for efficient circuit protection.
Replacing fuses generally involves identifying the blown fuse, removing it, and inserting a new one of the same amperage rating.
Useful Link
View Full PDF: Mazda CX-9 2021 User Manual