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Will a New Car Be Affected if Left in Heavy Rain for Two Days?

1 Answers

DiAmy

07/29/25 9:45am

Leaving a new car outside in the rain can have negative effects. The acidic substances in rainwater can damage the car's paint; the vehicle's electrical circuits and ignition system are prone to moisture, leading to poor ignition and reduced engine performance; the chassis can also get soaked. Below are some maintenance tips for a car after exposure to rain: 1. Wash the car promptly: Urban rainwater is usually acidic and may carry sticky substances that adhere to the car once the water evaporates, making them difficult to remove. It's advisable to take the car to a 4S shop or a professional car detailing service for a thorough cleaning, paying special attention to removing sludge and debris from the gaps under the doors and inside the wheel hubs, and ensuring these areas remain dry. The undercarriage should also be cleaned thoroughly. 2. Paint care: Since rainwater often contains acidic substances that can corrode the car's glossy paint layer, and it may also carry invisible dust that can oxidize under sunlight, it's best to perform a paint treatment after rain. A simple and effective method is waxing. 3. Brake system maintenance: Most cars use a dual-circuit vacuum-assisted hydraulic braking system, and the brake fluid, which transmits braking force, is highly absorbent. If water enters the brake fluid, it can cause brake failure or even complete loss of braking. Therefore, during maintenance, it's essential to check the brake fluid and any water traces on the brake discs to ensure the safety of the driver and passengers.

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