car slow down about 10km/hr when rain wiper is on

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tailow

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Joined
Apr 10, 2025
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my car will decelerate about 10km/hr when i on my wiper sensor (raining), and it always happen when i run at above 80km/hr.
it seem like you are stepping on the brake but actually not. i sent my car to tian siang, but they can't find the problem , and my
problem persist when it is a rainy day. anyone know the problem , please feedback, thks.
 
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