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How Often Should You Get an Underbody Wash to Avoid Rust?

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How Underbody Washes Prevent Rust on Cars 

If you’ve ever wondered whether skipping the underbody wash really matters, you’re not alone. At Flagship Honda in Rio Grande, PR, we get a lot of questions about how underbody washes prevent rust on cars—and trust us, it’s one of those small habits that makes a huge difference in keeping your vehicle strong and safe for years. 

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Why Is Washing the Underbody So Important? 

Think about all the things your car drives through—rain puddles, salty coastal air, dirt roads, even loose gravel. Most of it ends up stuck underneath, clinging to parts you can’t see. That grime isn’t harmless. Over time, it mixes with moisture and slowly eats away at the metal, creating rust patches that spread like wildfire. 

An underbody wash is like giving your car’s “hidden side” a reset. It blasts away grit, salt, and mud before they have a chance to do damage. For example, let’s say you park by the beach often. Sand and salty mist sneak under the car. Without a rinse, those minerals start corroding the frame, exhaust, and suspension parts. Regular washes cut that risk dramatically. 

representative image of a car with rust
Representative image of a technician with a tool

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How Often Should You Schedule an Underbody Wash? 

Here’s the fun part: it really depends on your driving routine. 

Coastal drivers or off-road adventurers: Aim for once a month. The salt, humidity, and dirt build up quickly. 

Everyday commuters: Every two to three months is usually plenty. 

After a storm or muddy road trip: Treat your car to an extra rinse sooner rather than later. 

Rust doesn’t form overnight—it’s a slow creep. But once it starts, repairs get pricey fast. That’s why keeping up with washes is like buying your car a little extra time and protection. 

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Schedule a Service Appointment in Rio Grande, PR! 

So, how often should you get an underbody wash? More often than you might think, especially if you’re driving in conditions that invite rust. It’s quick, affordable, and helps your car stay reliable long after the new-car smell fades. Schedule a service appointment at the Flagship Honda service center and give your car the care it needs—above and below.