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
Rear Window Defogger/Glass Antenna Repair
- Clean the rear window defogger/glass antenna using isopropyl alcohol.
- Attach tape to both sides of the rear window defogger/glass antenna.
- Using a small brush or marking pen, apply silver paint.
- After 2-3 min, carefully remove the tape without damaging the applied area.CAUTION:
- Do not operate the rear window defogger until the paint is completely dry. It may cause other malfunctions if it is used before the paint is dry.
- Dry the repaired part according to the following procedure.
- When the room temperature is 25°C {77°F}, leave it as it is for 24 h.
- When a heat gun is used, dry with the 150°C {302°F} air for 30 min.
Factory Service Tools
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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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