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Does Scratching the Undercarriage Damage the Car?

2 Answers

MatteoLee

09/02/25 2:05am

Scratching the undercarriage can damage the car. Damage to the car's undercarriage can affect the vehicle's lifespan and pose a threat to driving safety. Regular inspections are essential. As long as the suspension system is not damaged to the point of deformation, the car should be fine. However, if the car's frame or chassis deforms, it may be considered totaled, making regular maintenance necessary. Below are common types of undercarriage damage: Bottoming out or foreign objects hitting the undercarriage: These can cause fatal damage to the car, such as a broken catalytic converter shell, cracked engine oil pan, cracked transmission housing, or deformed suspension system. Undercarriage corrosion: The undercarriage frequently comes into contact with substances like sewage and grease, whose chemical components can corrode the undercarriage and its parts. Besides rainwater and oil sludge, which can corrode the undercarriage, snow-melting agents used in winter and seawater can also cause corrosion. Seawater is particularly corrosive to the undercarriage. If the undercarriage comes into contact with seawater, it should be rinsed thoroughly with plenty of fresh water or a neutral cleaning agent as soon as possible.

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Josh

09/14/25 4:29am

I've been driving for over a decade and occasionally experience undercarriage scrapes, which definitely damage the vehicle. A minor scrape might just leave scratches on the protective layer, but serious cases can harm critical components. Once I drove too fast on a bumpy road and scraped a big dent in the undercarriage, deforming the exhaust pipe—resulting in loud noise and air leaks, costing thousands to repair. The undercarriage houses components like the oil pan and suspension parts; damage here can lead to oil leaks or loose suspension, making driving unsafe. It's best to slow down over obstacles and consider adding an engine guard for protection. During car washes, take a moment to check the undercarriage for any abnormalities—addressing small issues early can prevent major troubles.

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