News file photo A truck spreads salt in Alpena.

DEARBORN — You might not see it, but something on winter roads right now could be slowly destroying your vehicle. Road salt, applied to improve traction on icy roads, can also accelerate rust on your vehicle’s undercarriage.

“Salt damage is easy to miss because it happens underneath the vehicle,” said Adrienne Woodland, spokesperson for AAA The Auto Club Group. “Even with today’s corrosion-resistant designs, the undercarriage is still vulnerable. And because corrosion is considered normal wear and tear, it’s usually not covered by insurance.”

Rust can weaken structural parts, brake lines, and suspension systems, while also discoloring or chipping paint. Routine washing is an inexpensive way to prevent damage and avoid costly repairs.

How Road Salt Affects EVs

Electric vehicles face unique risks because battery packs, cooling lines, and electronics sit low in the chassis and are more sensitive to corrosion. High�’voltage connectors, charging ports, and aluminum battery housings can degrade faster than similar components on gas-powered vehicles.

EV owners can reduce winter damage by:

– Rinsing the undercarriage regularly

– Applying corrosion-inhibiting coatings

– Keeping charging ports dry and free of salt

– Inspecting sensors and wiring

– Parking indoors when possible

“Winter road salt is one of the most overlooked threats to EV longevity,” Woodland said. “Protecting the battery and electronics is essential.”

AAA Tips to Prevent Salt Damage

– Wash regularly: At least every two weeks; more often after driving on heavily salted roads.

– Prioritize the undercarriage: Use car washes with underbody sprays.

– Rinse first: Flush off loose salt before washing to protect the paint.

– Apply wax: A fresh coat before winter helps shield paint from salt and moisture.