Mazda: Signs of Coolant Seep - Normal

Some Mazda vehicles (2016-2022 Mazda2, 2019-2022 Mazda3, 2019-2021 Mazda6, 2016-2022 CX-3, 2020-2022 CX-30, 2017-2020 CX-5 and 2021 CX-5 (with 8” or 10.25” center display) may exhibit accumulation of dried coolant around the water pipe.
Dec. 10, 2025
Dried coolant at the water pipe (1) is normal and does not require part replacement.

Dried coolant at the water pipe (1) is normal and does not require part replacement.

Some Mazda vehicles (2016-2022 Mazda2, 2019-2022 Mazda3, 2019-2021 Mazda6, 2016-2022 CX-3, 2020-2022 CX-30, 2017-2020 CX-5 and 2021 CX-5 (with 8” or 10.25” center display) may exhibit accumulation of dried coolant around the water pipe. This is caused by a gap between the housing and pipe due to a press fitting during manufacturing. The accumulated coolant is solidified and plugs the gap in a high temperature environment, stopping the seepage. This is normal. Simply clean off the dried coolant from around the water pipe with a wire brush.

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