Importing car parts means buying them from outside the United States and bringing them into the country
When you import car parts, you are responsible for understanding U.S. Customs and Border Protection rules, paying import duties and taxes, and making sure the parts meet Department of Transportation safety standards. The process is straightforward for common replacement parts like brake pads or filters, but more complex for parts that affect emissions or safety systems. You will need to know the tariff classification of what you are ordering, expect to pay duties on top of the purchase price, and allow extra time for customs clearance.
Most people import parts because they are cheaper abroad, unavailable domestically, or needed for a vehicle that is not sold in the U.S. The actual steps depend on whether you are ordering from a business or a private seller, and whether the parts are new, used, or rebuilt.
Key Takeaways
- U.S. Customs and Border Protection will charge import duty on car parts, typically ranging from 2.5% to 25% depending on the part type, and you must pay this in addition to the purchase price.
- Parts that affect emissions, safety, or airbags may require Department of Transportation certification or may not be importable at all, so verify this before ordering.
- Used and rebuilt parts have different import rules than new parts, and some categories require additional documentation or inspection.
- Ordering through a U.S. customs broker or freight forwarder can handle paperwork and tariff classification, but adds cost to your total.
- Shipping time and customs clearance can add two to eight weeks to delivery, depending on the port and the complexity of the shipment.
Understanding tariffs and import duties on car parts
Every car part imported into the U.S. falls into a tariff classification, which determines the duty rate you pay. The Harmonized Tariff Schedule (HTS) is the official list maintained by the U.S. International Trade Commission. For example, a new engine block might be classified at 8407.90.50, which carries a 2.5% duty, while a used transmission might be 8708.40.50 at 25%. The difference matters: you could pay $250 on a $10,000 engine or $2,500 on a $10,000 transmission.
You do not choose the tariff code yourself — U.S. Customs assigns it when your shipment arrives. However, if you order through a customs broker or freight forwarder, they will classify the parts before shipment and tell you the expected duty. This is worth doing if you are importing expensive or unusual parts, because misclassification can delay your shipment or result in a higher bill when customs re-examines it.
Duty is not the only cost. You will also pay federal excise tax on certain parts (tires, for example, carry a 11.5% excise tax), state sales tax in most states, and brokerage fees if you use an intermediary. Add these together and your total cost can be 30% to 40% higher than the sticker price.
Which parts can and cannot be imported
The Department of Transportation regulates parts that affect safety, emissions, or vehicle operation. Parts like brake components, airbag systems, seat belts, and catalytic converters have strict rules. A new or rebuilt part from an authorized manufacturer is usually importable, but a used one may not be. Used airbags, for instance, cannot be imported at all — they must be new and unused.
Emissions-related parts are restricted if your vehicle is model year 2010 or newer in most cases. This includes oxygen sensors, engine control modules, and fuel injection systems. If you import a part that does not meet EPA standards, you risk having it seized at the border or facing fines if it is installed and discovered during inspection.
Before you order, look up the specific part on the NHTSA (National Highway Traffic Safety Administration) website or contact the manufacturer to confirm it can be imported. If you are unsure, a customs broker can research this for you, usually for $50 to $150 per inquiry.
New parts versus used and rebuilt parts
New parts from authorized distributors are the simplest to import. They come with manufacturer documentation, carry standard tariff rates, and rarely face customs delays. The seller should provide a commercial invoice showing the part number, description, and value — this is what customs uses to classify and value the shipment.
Used parts are more complicated. Customs requires proof that the part was actually used in a vehicle and is not straightforward new inventory being misrepresented. You will need a bill of sale or invoice from the seller showing the part's condition and history. Used parts also carry higher tariff rates in many categories — sometimes 25% instead of 2.5% — because they are classified differently than new ones.
Rebuilt parts fall between new and used. A rebuilt part has been disassembled, inspected, and reassembled to like-new condition by a certified rebuilder. It requires documentation from the rebuilder showing the work performed. Rebuilt parts usually carry tariff rates closer to new parts, but you will need the rebuilder's certificate to prove the status.
How to handle customs clearance and documentation
When your shipment arrives at a U.S. port, it enters customs processing. Customs will examine the commercial invoice, verify the tariff classification, calculate duties, and either release the shipment or flag it for physical inspection. This process typically takes three to five business days for straightforward shipments, but can take two to three weeks if customs has questions about the part's classification or value.
You will need several documents ready. The commercial invoice from the seller must show the part description, part number, quantity, unit price, and total value. If the part is used or rebuilt, include the bill of sale or rebuilder's certificate. If you are importing through a freight forwarder or customs broker, they will request these documents before the shipment arrives and may ask for additional paperwork like a power of attorney form authorizing them to act on your behalf.
Once customs releases the shipment, you will receive a bill for duties and taxes. You can pay this through the broker or freight forwarder, or directly to customs if you are importing on your own. After payment, the part is released to you or your designated recipient.
Working with a customs broker or freight forwarder
A customs broker is a licensed professional who handles all customs paperwork and tariff classification on your behalf. A freight forwarder arranges transportation and may also handle customs. Using either one costs money — typically $100 to $300 per shipment, plus a percentage of the duty owed — but it saves time and reduces the risk of misclassification or delays.
If you are importing a single inexpensive part, the broker fee might exceed the savings from importing. But if you are importing multiple parts, expensive components, or parts with complex regulations, a broker is worth the cost. They know which ports process automotive parts fastest, can pre-classify parts to avoid surprises, and can resolve customs issues without you having to contact the port directly.
To find a broker, search the Customs Broker and Forwarders Association directory or ask the seller if they have a preferred broker. Get a quote in writing before you commit, and ask whether the fee is flat or percentage-based.
Timeline and shipping considerations
Importing a car part takes longer than domestic shipping. The seller needs time to prepare and ship the part (typically one to two weeks), the part travels by air or sea (three days to three weeks depending on origin and routing), and then customs processes it (three to twenty-one days). Total time is usually four to eight weeks, though expedited air shipping can cut this to two to three weeks at higher cost.
Sea freight is cheaper but slower — expect four to six weeks from Asia. Air freight costs more but arrives in five to ten days. If you need the part urgently, ask the seller about air shipping options and factor that cost into your decision.
During customs processing, your part sits at the port. You cannot speed this up, but a customs broker can monitor the shipment and alert you to any issues. If customs requests additional documentation, having a broker already involved means they can respond quickly rather than you having to wait for a customs notice in the mail.
Frequently Asked Questions
Do I have to pay duty on every car part I import?
Yes, all car parts imported into the U.S. are subject to duty unless they may have access to for a specific exemption, which is rare. Duty rates vary by part type, typically ranging from 2.5% to 25%. You also pay federal excise tax on certain parts like tires, and state sales tax in most states.
What happens if customs seizes my part?
Customs seizes parts that violate safety or emissions regulations, or that are misclassified and cannot be legally imported. You will receive a notice explaining why. In some cases you can appeal or request a ruling, but most seized parts are not returned. This is why checking regulations before ordering is important.
Can I import a used engine or transmission?
Used engines and transmissions can be imported, but they require a bill of sale proving they are used, and they carry higher tariff rates than new ones. Some states also have additional restrictions on used engine imports for emissions reasons, so check your state's rules before ordering.
Is it cheaper to import parts myself or use a broker?
For a single inexpensive part, importing yourself saves the broker fee. For multiple parts or expensive components, a broker often saves money by correctly classifying parts and avoiding misclassification delays. Get a broker quote before deciding.
What if the seller ships the part to me directly instead of to a broker?
The part will still go through customs, but you will handle all paperwork yourself. You will receive a customs notice at your address with the duty amount due. This works for straightforward parts but is risky for complex ones, because if customs misclassifies the part, you have to resolve it yourself.