Driver Tips: How Simple Sunroof Maintenance Can Save You Thousands

A sunroof adds light and comfort to a car’s cabin, but it also needs attention. Over time, the drainage channels can clog with dirt and leaves. When that happens, water won’t flow outside as intended—it ends up inside the cabin instead. The results are unpleasant: soaked upholstery, corrosion, electrical issues, and expensive repairs.

Most cars have four drains: two up front and two in the rear. If they clog, water finds its way into the interior. To prevent this, it’s best to clean them at least once a year. The process is simple: open the sunroof, remove debris with a brush or vacuum, wipe the channels with a microfiber cloth, and treat the seals with silicone spray. To check if the drains are working, pour a little water into the channels—if they’re clear, it will drain outside quickly.

For deeper blockages, a piece of trimmer line can help clear the tubes that run down the pillars. This quick preventive step takes just minutes but can save you from removing interior trim or repairing damaged wiring.

Sunroof care is a perfect example of how a small detail can prevent major costs. In some cases, a clogged drain has flooded the control module—a replacement that doesn’t come cheap. It’s far better to give your sunroof a little attention each spring and fall than to deal with a costly “indoor flood” later.