How Long Does It Take for Rust to Show on the Underneath of a New Car?

How long it takes a new car to show signs of rust on the undercarriage depends on the climate the vehicle is driven in, preventative measures and how well the car is maintained.

Average

Modern cars are made of galvanized steel, making them more resistant to rust than older cars. Most factory warranties cover rust for at least five years. Volkswagen offers the longest corrosive coverage with a 12 year warranty. Cars do not usually begin to show signs of rust until at least five years, after the factory warranties have expired.

Factors

If you drive your car in a climate where the roads are salted, your car is likely to rust sooner. Your car is also at risk if you frequently drive by the ocean. The salt from the roads or in the air reacts with the metal to cause corrosion.

Prevention/Solution

Wash your car regularly to prevent the buildup of salt. If you live in an area where the cars are prone to rusting early, consider an aftermarket rustproofing service, which may delay the development of rust for an additional five years.

References

• Corrosion Doctors: Rust Prevention Tips