The Part Has to Fit the Car, and Then It Has to Enter

Fitment Is Data, Not a Sample

Auto parts are the one category at the fair where a sample that fits proves almost nothing. A brake pad that seats correctly on the caliper in front of you fits that car. Whether it fits the 2019 version of the same model, the variant sold in another market, or the facelift with a different caliper, is a question about a database.

Suppliers work from two numbering systems. The original equipment number identifies the part as the vehicle manufacturer specified it. The aftermarket cross-reference maps that number to a supplier's own code and to the range of vehicles it claims to fit. A serious supplier can tell you which OEM numbers their part replaces, which years and which engine variants are covered, and where the exceptions are.

Ask for the cross-reference list in writing, then spot-check three entries against a parts catalogue you trust. Errors in fitment data are common and rarely malicious: a range was copied from a predecessor's catalogue, a variant was added without a test, a year was typed wrong. The cost of the error lands on you, in returns, in a marketplace rating, or in a mechanic's labour claim.

Some Parts Carry Their Own Approval

Aftermarket parts are regulated by function, and the regulation follows the safety consequence.

• Braking. In Europe, aftermarket brake pads and linings fall under UN Regulation 90, which requires approval against a replacement part standard and a marking on the product. A pad sold without it is not legal for road use in that market, whatever its friction performance.
• Lighting. Headlamps and lamps are approved against UN regulations with an E mark and a specific approval number. US requirements are different again, under FMVSS 108, and a European-approved lamp is generally not compliant there.
• Safety systems. Airbags, seat belts and structural parts are the items where a counterfeit part is a liability case rather than a warranty claim.
• Emissions components can require their own approval and are increasingly checked at inspection.

The practical question at a booth is not whether the part works. It is which approval the part carries, which number is on it, and whether the supplier's certificate covers the variant you intend to import. A supplier who answers all three without leaving the stand is a manufacturer or a very well organised trader.

Fluids, Batteries and the Dangerous Goods List

A large share of an auto parts order is not spare parts at all. It is chemicals and energy storage, and both change the transport.

• Brake fluid. Hygroscopic, glycol-based, and classified as a hazardous substance in many contexts. Check the classification before it is packed, because a drum of brake fluid in a container with no declaration is a problem at the terminal.
• Lubricants and cleaners. Aerosol cans are pressurised and often flammable; solvents carry a flash point that decides their class.
• Lead-acid batteries. Class 8, corrosive, and heavy. They need their own packaging and often their own booking.
• Lithium batteries. Class 9, with the UN 38.3 documentation and the air restrictions that go with it.
• Used parts. Many markets restrict or refuse used automotive components, and a container of them can be turned back whatever the documentation says.

The consequence is a shipment that needs two bookings: general cargo and dangerous goods. Buyers who discover this after the goods are packed at a warehouse in Guangzhou lose a week and pay for repacking, because the dangerous goods have to be segregated, marked and declared separately from the moment they are packed.

Branded Parts and the Trademark Question

The category has a counterfeit problem that is well documented and commercially tempting, because the margin on a branded part is the reason it is copied.

Three situations appear at the fair, and only one of them is safe.

Genuine parts with authorisation. The supplier holds a distribution agreement. Ask to see it, and check whether the territory in the agreement includes your market, because parallel import rules differ and an authorisation for Southeast Asia is not an authorisation for Europe.

Own-brand parts. The supplier makes the part and sells it under their own name, or under yours. This is the ordinary route and the one most buyers use. What matters is the approval marking and the liability if the part fails.

Copies with a brand on them. The part is fine, the box carries somebody else's trademark. Whatever the quality, the goods are infringing, and customs in most major markets will detain them on their own initiative. The supplier will not be the one paying for the storage.

If you are ordering under your own brand, ask who owns the tooling and what happens to it if the relationship ends. In this category tooling is expensive and the argument about who owns it usually starts in year three.

Packing Dense and Awkward Shapes

Auto parts are a packing problem before they are a freight problem. The shapes are irregular, the weights are high, and the corners are sharp.

• Brake discs and drums. Heavy, stackable, and easy to distort if stacked by weight rather than by carton. Individual boxes with a disc inside, cartons of five or ten.
• Body panels. Large, thin, and impossible to stack. They travel in dedicated racks or in cartons with a rigid frame, and they occupy volume that the weight does not justify.
• Glass and lamps. Moulded pulp, upright orientation, and a carton that states which way is up in a language the warehouse reads.
• Suspension and exhaust. Long and awkward. They set the carton dimensions for the whole shipment and often force a mixed loading plan.
• Rust. Bare steel parts need VCI paper or an oil film, particularly on a route that crosses a cold climate.

The mark on the carton is part of the product in this category: part number, vehicle application, quantity and gross weight. A warehouse that cannot match a carton to a part number without opening it will open it, and the part comes back damaged.

What the Scale Does to the Freight

Two cargo types in one order, pulling in opposite directions.

Brake discs, batteries, suspension components and tools are dense. They reach the container's payload limit early, and a load of them will leave visible space at the door. Body panels, bumpers and lamps are volumetric and fill the box long before the weight matters.

The practical answer is to load them together, and this is one of the few categories where a mixed container is straightforwardly better than two part-loads. Dense parts on the floor, volumetric parts above and around, with the loading plan checked against the floor load limit rather than against the cubic metres alone.

Air freight deserves a mention for a specific case: the emergency replenishment of a fast-moving part, where a distributor is out of stock and the customer is waiting. On a part worth 40 dollars, air rarely works. On a part worth 400, it often does, and the decision is the customer's service level rather than the freight rate.

What to Verify at the Stand

Five items, and the order matters because the first one is the cheapest to check.

• The cross-reference list, in writing, covering OEM numbers, model years and variants.
• The approval marking and number on the part itself, not on the box.
• A test report for the function that matters: friction and wear for brakes, photometry for lamps, material for structural parts.
• A statement of what is dangerous goods in the order, with the UN number and the packing group.
• The tooling ownership question, answered in writing, if you are ordering under your own brand.

Then measure the carton and weigh it. Auto parts orders are won and lost on the difference between what a supplier says a carton weighs and what the warehouse scale says, and the warehouse scale is the one the carrier will use.

Approval regimes, dangerous goods classifications and restriction dates above reflect the general position in late 2026. Confirm the requirement for the specific part and market before ordering.

The First Container, and the Second

Auto parts buyers tend to place a small first order and a much larger second one, and the second one is where the category punishes optimism.

A first order of twenty part numbers is easy to pack and easy to check. A second order of four hundred is a warehouse exercise: cartons that look alike, part numbers that differ by one digit, and a receiver who will not open every box to find out. The marks and the packing list carry the whole load at that point, and both were designed on the first order when nobody was paying attention.

The structure that works is unglamorous. One part number per carton where the value justifies it. A carton mark that carries the part number, the application and the quantity, printed and not written. A packing list that follows the same order as the loading plan. And a photograph of each pallet before the doors close, because the argument about what was loaded is settled by that photograph.

The second container is also where the fitment data gets tested, at scale, by customers who will return the parts that do not fit. That is the moment to know whether the cross-reference list was a database or a catalogue.

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