Most replacements cost about $100 to $700 in total, depending on the vehicle, the exact plastic cover needed, and labor rates. Simple aftermarket shields are typically cheaper, while OEM parts or multiple panels on more complex models can push the price higher.
What is being replaced and why it matters
The plastic cover under your car, often called a splash shield or undertray, protects critical components from road debris, water, and impacts while aiding aerodynamics. Depending on the model, there may be one or several panels, and they’re usually secured with screws and plastic clips. When damaged, a shield can crack, crack, or fall loose, which can worsen undercarriage wear or cause noise and drag.
Price ranges: Parts and labor
Prices vary by part type, whether you choose aftermarket or OEM, and how many pieces you need for your vehicle.
- Basic plastic splash shield (single piece, aftermarket): typically $20–$60
- OEM splash shield replacement (single piece): typically $60–$120
- Front undertray assembly or multi-piece kits (aftermarket): typically $100–$300
- Front undertray assembly (OEM): typically $200–$600
- Hardware and clips: typically $5–$20
In practice, many cars use more than one shield and require additional hardware, which can affect the final price.
Overall, simple shield replacements tend to be at the lower end, while full undertray assemblies and OEM parts add to the cost.
Labor costs and total installed price
Labor charges and the time required to complete the replacement significantly influence the total. Here are typical ranges for installation in the United States during 2024–2025.
- Labor rate: $75–$150 per hour, depending on region and shop
- Time to replace: 1–2 hours for a single-piece splash shield; 2–4 hours if bumper removal or multiple panels are involved
- Total installed price range: roughly $150–$500 for simple aftermarket parts; $500–$900 or more for OEM parts or more complex installations
Many factors can push the price toward the higher end, including vehicle design, the need to remove other parts, and higher regional labor rates.
Factors that affect price
Vehicle make, model, and undertray design
Some cars use a single, easy-to-access shield, while others rely on multiple panels integrated with the bumper and engine bay. Luxury or performance models may use more robust or specialized parts, increasing both part and labor costs.
Labor rates and geography
Labor costs vary widely by region and shop. Urban areas and dealer networks typically charge more than rural or independent shops.
OEM vs aftermarket parts
OEM parts tend to be pricier but may fit exactly like the original. Aftermarket shields are cheaper but require careful fitment, and some cars’ undertray setups rely on specific clips or mounting hardware.
DIY feasibility
Replacing a splash shield is often doable for a confident DIYer with basic tools. If the bumper must be removed or the engine splash shield is deeply integrated, professional service is usually recommended to ensure proper alignment and clipping.
Where to get it replaced
Dealership
Dealerships typically use OEM parts and guarantee the installation, but can be the most expensive option.
Independent auto shop
Independent shops generally offer competitive labor rates and can source either OEM or aftermarket components, making them a common choice for most drivers.
DIY considerations
For a straightforward shield replacement on a simple vehicle, a DIY approach can save labor costs, but ensure you have the right clips and mounting hardware and follow the vehicle’s service manual.
What to know before you replace
Before replacing the plastic undercarriage cover, confirm what your vehicle actually needs (one shield or multiple panels), whether clips or hardware must be replaced, and whether the bumper must be removed for access. Get quotes that separately itemize parts and labor so you can compare apples-to-apples.
Summary
Replacing a plastic undercarriage cover typically costs between roughly $100 and $700 for parts, plus $75–$150 per hour for labor. Simple, aftermarket shields on less complex vehicles usually land near the lower end of the price spectrum, while OEM parts and multi-panel installations on newer or more complex cars push costs higher. Shop around, consider DIY feasibility, and ask for itemized estimates to understand where your money goes.
Final takeaway
If you notice a damaged splash shield or hear rattling from the undercarriage, have a professional assess whether replacement is necessary or if a quick clip-and-repair can suffice. Keeping the undercarriage protected helps prevent debris-related damage and maintain fuel efficiency, making timely replacement a practical consideration for many drivers.
What is the plastic cover underneath your car called?
engine splash guard
The engine splash (also called an engine splash guard, skid plate, underbody cover, or lower engine cover) is a plastic or metal protective panel installed on the underside of a vehicle engine. It protects critical parts on the underside of your car, particularly engine components, from the elements and road debris.
Can I replace the plastic under my car?
While many car owners can handle engine splash shield replacement on their own, there are times when it makes sense to let a professional take over. If you're not comfortable raising your vehicle, don't have the necessary tools, or simply prefer peace of mind, a mechanic can complete the job quickly.
Can I drive without the plastic cover under my car?
Short-Term Driving Without It
However, you'll be exposing sensitive parts like the oil pan, belts, alternator, and wiring to potential damage. Driving in dry conditions on well-paved roads lowers your risk, but the longer you delay repair, the higher the chance something gets damaged.
How much does it cost to replace the plastic undercarriage of a car?
Undercarriage damage repair costs
Replacing it can cost up to $500.