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October 31, 2025 Service bulletin

Some customers may notice water in the trunk after a car wash or heavy rain

Mazda technical service bulletin 09-034-25a for 2019-2026 Mazda MAZDA3.

Bulletin number
09-034-25a
Component
Structure: body
Summary
Some customers may notice water in the trunk after a car wash or heavy rain. This may be caused by insufficient sealing performance of the trunk lid weatherstrip. Due to improper installation of weatherstrips, the lip of the weatherstrip may lean toward the inside of the trunk, resulting in insufficient sealing performance. To eliminate this concern, the length of the trunk lid weatherstrip has been extended 14 mm {0.5 in.}.

Owners of these vehicles have filed 13 complaints in the body category.

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