Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2021 Mazda 3 BaseFACTORY OEM SERVICE PROCEDURE
Relay And Fuse Block Removal/Installation: Notes
Replacement Part
| Band |
| Quantity: 2 |
| Location of use: Relay and fuse block lower cover |
NOTE:
- When replacing the relay and fuse block, it is necessary to switch terminals from the relay and fuse block terminal prior to replacement to the relay and fuse block terminal on the replacement. When switching terminals, ready the replacement relay and fuse block before pulling out the terminal of the relay and fuse block prior to replacement. This is because it is necessary to switch the terminals one at a time so that the installation positions are not mistaken.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.