When automobiles were first created, experienced technicians would drill holes into their metal sheet panels in order to implement rust protection. The logic behind the process was that in order to fully reach and seep through the welded and sealed materials, there needed to be unrestricted access to them. Although the debate between the benefits and disadvantages of drilling holes into auto parts still takes place, the creation of oil-based sprays that do not require drillings, such as WD-40, has greatly influenced the automotive industry. Now, decades later, just like the market for anti-corrosion and rust protection products has grown so have the interests and concerns of potential car customers.
Drivers have become more knowledgeable about the negative impact that surroundings can have on the machines and more demanding of the services that can prevent these impacts. Consecutively, car manufacturers have added Corrosion Warranties into their basic contracts. The concept attempts to demonstrate that even though brands trust their products they are willing to repair or replace auto parts where corrosion took place. However, since these contracts can get extremely regulated and vary a lot from case to case, Direct Auto Mall has decided to create this detailed guide explaining Everything You Need to Know About Corrosion Warranties.
Corrosion Warranties vary from manufacturer to manufacturer (so we recommend that you research what your specific car manufacturer offers). However, there are three basic denominations that manufacturers, dealerships and extended warranty companies use when referring to types of corrosion.
(Keep in mind that brand manufacturers sometimes use the names and terminologies differently).
Most manufacturers and dealerships warranties only cover Rust Perforation. It specifically takes place when any metal sheet panels rust through the inside to the outside of the car. For that reason, it is also known as “Rust-Through” or “In-Out Perforation.”
A few brands also refer to Surface Corrosion as a result of Rust Perforation (when the chemicals breach through the inner panels of the car body and corrodes its surface).
However, Surface Corrosion can also apply to any sort of rust damage appearing on the surface of the car. Even though such cases are somewhat rare, given the rust/corrosion proofing automobiles undergo nowadays, a few manufacturers will offer Surface Corrosion coverage as a part of New Vehicle Warranties. Such contracts imply that manufacturers will be responsible for any sort of superficial damage only caused by defective material or erroneous workmanship.
“Cosmetic” Corrosion is the term given to all types of damages that happen to the exposed parts of the car (including the underbody) due to foreign impact. They are usually covered as add-on warranties by extended warranty companies.
To learn more about “Cosmetic” Corrosion Warranty click here. (link to extended warranty article)
Different types of corrosion and rust-through can be caused due to:
In addition, the driver carrying any corrosive substances (such as fertilizers, deicing salt, chemicals, etc.), should certify that the products are properly packaged and sealed in order to avoid leakages. Warranty providers will deny corrosion coverage due to leakages as such.
Rust Perforation, Surface Corrosion and even “Cosmetic” Corrosion can leave severely noticeable marks on the exterior body of the vehicle. However, drivers should also be mindful of the gradual and dangerous impact that they can have on the inner elements of the car such as its mechanical, tech and safety features. Therefore, Direct Auto Mall has combined a list of a few measures drivers can take in order to prevent Rust and Corrosion
Even though most of the Rust Perforation/Surface Corrosion Warranties cover damages that took place between the first 5 to 10 years and offer unlimited mileage terms (whichever comes first), the regulations vary between different manufacturers.
The information that does not tend to vary is:
|Car Brand||Rust Perforation||Surface Corrosion||“Cosmetic” Corrosion||Term Lenght Limit||Mileage Limit||Link|
|x||4 years||50,000 miles|
|Chevrolet||x||6 years||100,000 miles||link|
|x||3 years||36,000 miles|
|x||1 year||12,000 miles|
|GMC||x||3 years||36,000 miles||link|
|x||6 years||100,000 miles|
|Hyundai||x||3 years||36,000 miles||link|
|Kia||x||5 years||100,000 miles||link|
|Land Rover||x||5 years||Unlimited||link|
|Mercedes-Benz||x||4 years||80,000 miles||link|
|Mitsubishi||x||7 years||100,000 miles||link|
|Toyota||x||5 years||60,000 miles||link|
|Volkswagen||x||7 years||100,000 miles||link|
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