--- title: "Engine Splash Shields: Why They Matter & When to Replace Them" url: "https://www.fitparts.com/blog/post/engine-splash-shields-the-protection-under-your-car-you-shouldnt-ignore" description: "Learn why engine splash shields protect vital components from water, dirt and road debris, how they improve underbody airflow, and when a damaged or missing..." --- Back # Engine Splash Shields: The Protection Under Your Car You Shouldn't Ignore ![Engine Splash Shields: The Protection Under Your Car You Shouldn't Ignore](https://www.fitparts.com/media/wysiwyg/Fitparts_engine_splash_cover.jpeg) Tags [vehicle aerodynamics](https://www.fitparts.com/blog/tag/vehicle-aerodynamics.md) [undercarriage protection](https://www.fitparts.com/blog/tag/undercarriage-protection.md) [underbody shield](https://www.fitparts.com/blog/tag/underbody-shield.md) [underbody panel](https://www.fitparts.com/blog/tag/underbody-panel.md) [underbody aerodynamics](https://www.fitparts.com/blog/tag/underbody-aerodynamics.md) [splash shield replacement](https://www.fitparts.com/blog/tag/splash-shield-replacement.md) [splash shield repair](https://www.fitparts.com/blog/tag/splash-shield-repair.md) [splash shield clips](https://www.fitparts.com/blog/tag/splash-shield-clips.md) [road debris protection](https://www.fitparts.com/blog/tag/road-debris-protection.md) [replacement splash shield](https://www.fitparts.com/blog/tag/replacement-splash-shield.md) [oil pan protection](https://www.fitparts.com/blog/tag/oil-pan-protection.md) [is FITPARTS legit](https://www.fitparts.com/blog/tag/is-fitparts-legit.md) [front-end repair](https://www.fitparts.com/blog/tag/front-end-repair.md) [front engine splash shield](https://www.fitparts.com/blog/tag/front-engine-splash-shield.md) [FITPARTS splash shields](https://www.fitparts.com/blog/tag/fitparts-splash-shields.md) [FITPARTS auto part](https://www.fitparts.com/blog/tag/fitparts-auto-part.md) [fender liner replacement](https://www.fitparts.com/blog/tag/fender-liner-replacement.md) [engine undertray](https://www.fitparts.com/blog/tag/engine-undertray.md) [engine under cover](https://www.fitparts.com/blog/tag/engine-under-cover.md) [engine splash shields](https://www.fitparts.com/blog/tag/engine-splash-shields.md) [engine splash shield](https://www.fitparts.com/blog/tag/engine-splash-shield.md) [engine splash guard](https://www.fitparts.com/blog/tag/engine-splash-guard.md) [engine protection](https://www.fitparts.com/blog/tag/engine-protection.md) [engine compartment protection](https://www.fitparts.com/blog/tag/engine-compartment-protection.md) [damaged splash shield](https://www.fitparts.com/blog/tag/damaged-splash-shield.md) [collision repair parts](https://www.fitparts.com/blog/tag/collision-repair-parts.md) [car splash shield](https://www.fitparts.com/blog/tag/car-splash-shield.md) [bumper replacement](https://www.fitparts.com/blog/tag/bumper-replacement.md) [aftermarket auto body parts](https://www.fitparts.com/blog/tag/aftermarket-auto-body-parts.md) Most drivers rarely see the underside of their engine. Unless the car is on a lift or you're changing the oil yourself, there isn't much reason to look down there. But underneath many modern vehicles you'll find a large plastic or composite panel covering much of the bottom of the engine compartment. It's usually called an engine splash shield, engine under cover, or underbody shield. It may look like a simple piece of plastic, but it has an important job. Once it's damaged or missing, some of the important components underneath your car become much more exposed to everything happening on the road. ## What's Hiding Behind an Engine Splash Shield? Look underneath a vehicle without a splash shield and you'll understand why manufacturers put one there. Depending on the vehicle, this area can include the engine oil pan, transmission housing, belts, hoses, wiring, electrical connectors and other components. Some vehicles also have additional underbody panels protecting neighboring areas. None of these components benefit from a constant supply of water, mud, sand, road salt and small stones thrown underneath the vehicle while you're driving. An [engine splash shield](https://www.fitparts.com/splash-shields.md) creates a barrier between these components and the road. If the original shield is cracked, missing or has damaged mounting points, replacing it helps restore the protection the vehicle was designed to have. ## It Does More Than Stop Water The name "splash shield" makes the part sound like its only purpose is keeping water away from the engine. That's only part of the story. While driving, the underside of a car is constantly exposed to dirt, gravel, standing water and other road debris. The shield helps prevent much of that material from being thrown directly into the engine compartment. It also helps keep the underside of the engine cleaner. That may not sound particularly important, but reducing the amount of dirt and road grime accumulating around components, connectors and fasteners is certainly preferable to leaving everything exposed. ## There's an Aerodynamic Reason for It Too Engine splash shields are also part of the way manufacturers manage airflow underneath modern vehicles. The bottom of a car is anything but smooth. Without underbody panels, moving air encounters suspension components, the engine, transmission and countless irregular surfaces. This creates turbulence and aerodynamic drag. Covering parts of the underside creates a smoother path for airflow. Vehicle aerodynamic studies have demonstrated that factory underbody panels can produce measurable reductions in aerodynamic drag. In testing of several passenger vehicles, removing OEM underbody panels increased drag on some vehicles, including an increase of approximately 2.5% in drag area on one crossover SUV. That doesn't mean replacing a missing splash shield will suddenly transform your gas mileage. The effect varies significantly between vehicles. It does show, however, that manufacturers didn't put these panels underneath the car simply to keep the engine clean. ## Why Engine Splash Shields Get Damaged So Often Unfortunately, the location that makes a splash shield useful also makes it vulnerable. It's one of the lowest parts of the vehicle. Parking curbs, road debris, potholes and steep driveways can all damage it. A relatively minor front-end impact can also crack the shield even when the damage elsewhere on the vehicle doesn't look particularly serious. Sometimes the shield itself survives, but one or two mounting points break. Once that happens, air moving underneath the vehicle can cause the loose section to move, vibrate or hang down. Many drivers first realize there's a problem when they hear plastic scraping against the pavement or flapping underneath the car at highway speed. At that point, removing the loose shield may seem like the easiest solution. But if the manufacturer designed the vehicle with one, replacing it is usually the better repair. ## Don't Ignore Broken Mounting Points A splash shield doesn't necessarily need a huge crack to require attention. The mounting holes around its edges can tear over time. Plastic clips can break. Screws can disappear after previous repairs or oil changes. Eventually, a panel that was originally secured at multiple points may be hanging from only a few. Simply adding a larger washer or forcing a clip into damaged plastic may work temporarily, but it doesn't restore the panel itself. If several mounting points are torn or the shield is badly cracked, replacing it is often the more practical solution. ## A Good Time to Replace It Is During Other Front-End Repairs One of the best times to inspect an engine splash shield is when other parts around it are already being removed. For example, if you're replacing a front bumper after an accident, much of the lower front section of the vehicle is already accessible. The same is true when replacing a damaged fender liner. These components meet in the same general area and often connect through neighboring mounting points and fasteners. A front-end impact that damages the bumper or fender liner can also crack the engine splash shield or tear its mounting holes. With other damaged parts already removed, replacing the splash shield usually becomes a much simpler job. It also saves you from taking parts of the vehicle apart again a few weeks or months later. ## Can You Drive Without an Engine Splash Shield? In many cases, the car will still drive normally without one. That doesn't mean leaving it off is a good long-term solution. Without the shield, components underneath the engine are more directly exposed to water, dirt, stones and road debris. The original underbody airflow is also changed. There are vehicles and configurations that were designed without a full engine under cover, so the presence and design of these panels varies. But if your vehicle left the factory with a splash shield, there was a reason for it. Restoring that protection makes more sense than simply removing a damaged panel and deciding the vehicle doesn't need it anymore. ## Small Part, Important Job An engine splash shield isn't a component most people think about until something happens to it. You can't see it when the car is parked, and replacing one isn't particularly exciting. But it quietly protects components underneath the engine every time you drive through rain, gravel, dirt or road debris. It also forms part of the vehicle's original underbody design and airflow management. If yours is cracked, hanging down or missing entirely, don't automatically assume you can live without it. And if you're already replacing a bumper or fender liner, that's a perfect opportunity to inspect the shield and replace it if necessary. At [FITPARTS](https://www.fitparts.com/index.md), you can find replacement [engine splash shields](https://www.fitparts.com/splash-shields.md) and other collision parts for thousands of vehicle applications. If you're already repairing front-end damage, it's worth checking all of these components before putting everything back together. Share on Facebook Share on Twitter Share on Pinterest # More Blog Posts 1. ### [Why We Created FITPARTSReview.com: Real Customer Reviews in One Place](https://www.fitparts.com/blog/post/why-we-created-fitpartsreviewcom-real-customer-reviews-in-one-place.md) Buying a replacement bumper cover online requires a certain amount of trust. [Read Full](https://www.fitparts.com/blog/post/why-we-created-fitpartsreviewcom-real-customer-reviews-in-one-place.md) 2. ### [How FITPARTS Selects Suppliers for Bumpers and Fender Liners](https://www.fitparts.com/blog/post/how-fitparts-selects-suppliers-for-bumpers-and-fender-liners.md) When customers buy a replacement bumper cover or a fender liner online, they usually focus on fitment, price, and delivery time. [Read Full](https://www.fitparts.com/blog/post/how-fitparts-selects-suppliers-for-bumpers-and-fender-liners.md) 3. ### [FITPARTS.com – Are They Legit? Here Is the Straight Answer Backed by Six Years of Data](https://www.fitparts.com/blog/post/fitpartscom-–-are-they-legit-here-is-the-straight-answer-backed-by-six-years-of-data.md) It has quietly become one of the most common questions people ask online when they are getting ready to buy a replacement bumper cover. 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