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
Sound settings
- The following settings are available for the sound quality.
| Item | Content | ||||
|---|---|---|---|---|---|
| Sound Adjustment Mode (Selects a Basic or Advanced sound adjustment) |
Basic/Advanced | ||||
| Bass (Bass adjustment) |
+ Side: Increased bass - Side: Decreased bass |
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| Treble (Treble adjustment) |
+ Side: Increased treble - Side: Decreased treble |
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| Equalizer (Selects or creates the desired equalizer curve) |
Flat/Pop/Rock/Jazz/RB/Classical/Custom 1/Custom 2/Custom 3/Customize EQ | ||||
| Listening Position (Selects the desired listening position) |
Driver's Seat/All Seats | ||||
| Fade (Front/rear volume adjustment) |
Front side: Front speaker volume decrease Rear side: Rear speaker volume decrease |
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| Balance (Left/right volume adjustment) |
Left side: Increase left side speaker volume Right side: Right side speaker volume increase |
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| ALC (1) (Auto volume adjustment) |
OFF/Level 1/Level 2/Level 3/Level 4/Level 5/Level 6/Level 7 | ||||
| Automatic Source Level Adjustment (Automatically stabilizes volume levels across sources) |
Enable/Disable | ||||
| Bose® Stereo Mode (Selects the desired stereo listening experience) |
Standard/Linear | ||||
| Bose® Centerpoint (2) (Automatic surround level adjustment) |
OFF/Level1/Level2/Level 3 | ||||
| Bose® AudioPilot (2) (Automatic volume adjustment) |
OFF/Level1/Level2/Level 3 | ||||
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Factory Service Tools
Use the Manual With the Right Hardware
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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.
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