Buying motor & vehicle spare parts from China

Spare parts are the one category where the customer already knows exactly what they want — and where "looks the same" is worth nothing. A part either carries the right number, fits the right vehicle and meets the right approval, or it is scrap with a photo. China supplies a large share of the world's aftermarket parts, including parts made on the same lines as the branded ones. Sorting those from the copies is the job.

The one-minute version: buy by part number and cross-reference, never by photo; prefer honest unbranded aftermarket over anything wearing a famous brand's box; check the legal approval mark for brakes, lighting and emissions parts; and fit a sample to the actual vehicle before you order a pallet.

The old Don Express marketplace listings in this category led with numbers — hub-bearing assemblies quoted by OEM reference, fuel lift pumps by their agricultural-engine part number, AC compressors by their model code, plus bulbs, HID burners, testers and 12/24 V truck air-conditioning. The storefront is offline; the manufacturers behind those listings still sell directly.

1. The part number is the product

• Work from the OEM number, then cross-reference. Get the number from the old part or the vehicle's parts catalogue, and ask the supplier to confirm their part against it in writing. Note that OEM numbers supersede — a number can be replaced by a later one that fits the same vehicle.
• Treat listing compatibility tables as marketing. Those "fits 2016–2020" ranges are copied between listings and are wrong often enough to matter. The VIN, the OEM number and a photo of the actual part's mating surfaces are what you verify against.
• Measure the things that decide fitment — bolt pattern and PCD, spline count, shaft and bore diameters, connector type and pin count, thread pitch, overall length. Ask for photos with a caliper or ruler in frame.
• Left/right, drive side and market variants are the classic silent mismatch, along with 12 V vs 24 V on anything electrical.

2. "Genuine", OEM, aftermarket — what the words actually mean

• Genuine — sold in the vehicle maker's own box. Not what you are buying from a Chinese factory, and a listing that claims it is making a trademark claim you inherit.
• OEM supplier part — made by the company that supplies the vehicle maker, sold in its own box. This is a real, legitimate product and often the best value in the trade.
• Aftermarket — an independent manufacturer's equivalent. Quality spans the entire range, which is why supplier qualification (§6) matters more here than anywhere.
• "OE quality" / "original" — in a Chinese listing this almost always means "our own product", not a certification. Ask what it is measured against.

3. Counterfeits: the hard line, and it is a safety line

Fake-branded bearings, brake components, filters and electrical parts are one of the largest counterfeit trades in the world, and this category is where a fake actually hurts someone. Two rules hold up well:

• Never buy a famous brand's box from an unauthorised source. A supplier who can print any brand's packaging is telling you what their business is. Customs seizes it, the rights holder pursues it, and if a counterfeit safety part fails after you sold it, "the factory said it was genuine" is not a defence.
• Buy honest unbranded aftermarket instead — from a factory that qualifies on its own testing and paperwork. It is cheaper, legal, and you can actually stand behind it.

4. What to check, by part family

• Hub bearings and bearings — ask about steel source and grade, seal design, and whether an integrated ABS sensor ring is present and magnetically intact (a damaged encoder ring means fault codes, not noise). Spin-test samples for roughness and play.
• Brakes — in Europe, replacement pads and discs need ECE R90 approval, with the approval number marked on the part. No mark means you cannot legally sell them for road use. Friction-coefficient class should be stated.
• Lighting — road-legal bulbs and lamps carry a DOT marking (US) or an E-mark (ECE). Watch out for LED "upgrade" bulbs sold for halogen headlight housings: in most markets those are not road-legal at all, whatever the listing says, and colour-temperature claims on cheap HID burners (D2S and friends) are usually optimistic. Also confirm ballast compatibility rather than assuming.
• Fuel pumps — specify pressure and flow at the operating voltage, in-tank vs inline, ethanol-blend compatibility, and the filter/strainer arrangement. A pump that only quotes "high pressure" hasn't been specified.
• AC compressors and truck air-conditioning — confirm the refrigerant the unit is built for (R134a and R1234yf are not interchangeable), the oil type and charge volume, clutch coil voltage, and that the unit ships sealed and pressure-tested.
• Sensors and electronics — connector pinout, signal type and whether the part needs ECU coding or immobiliser matching after fitting. Parts that require dealer programming are a support burden you should price in.
• Chemicals — threadlockers, gasket sealants and anti-corrosion compounds are dangerous goods with MSDS and labelling rules; see the general retail goods guide for how those ship.

5. Emissions and type-approval parts

Catalytic converters, particulate filters, EGR and sensor components sit inside emissions law. Selling parts that defeat an emissions system — delete kits, emulators, "test" pipes — is illegal in the US, the EU and the UK, and enforcement has reached suppliers and sellers, not just installers. Replacement catalysts generally need their own approval to be road-legal. Check before you list, not after.

6. Qualifying the supplier

• Ask for IATF 16949 certification — the automotive quality-management standard (it replaced ISO/TS 16949). It isn't a guarantee, but its absence tells you the factory has never had to work to automotive process discipline.
• Ask what OEM programmes they supply, and for evidence. A factory running a vehicle-maker line has measurement systems a trading company does not.
• Ask for their test capability — endurance rigs, salt-spray corrosion testing, pressure and leak testing, dimensional reports. Then ask for the report on your batch.
• Batch traceability — date codes and lot numbers, so a bad batch can be isolated instead of poisoning your whole stock.
• Factory, not trader, for anything technical or safety-related. Ask a question only the maker can answer.

7. Remanufactured parts and cores

Remanufactured compressors, starters, alternators and steering racks are a legitimate and economical product — if reman means what it should: dismantled, cleaned, wear parts replaced to spec, reassembled and tested. Ask which components are always replaced, what the unit is tested against, and whether a core return (and core charge) is part of the deal. "Rebuilt" with no specification usually means cleaned and painted.

8. Freight, packing and customs

• Dense, valuable, cheap to ship — the good news in this category. Sea freight for volume; courier is viable for samples and small high-value parts.
• Packing matters more than usual — bare metal parts need corrosion protection (VCI paper or oiled wrap), oil-wet and reman units need sealed bags, and threaded or machined surfaces need caps. Specify this in writing; ask for photos of the packed cartons.
• Codes and duty — vehicle parts, bearings and lighting sit under different headings with different rates, and US Section 301 tariffs cover much of this trade. Each SKU needs its own code confirmed by a broker, and the importer of record carries the liability.
• Mark the boxes honestly. Parts described loosely to reduce duty are exactly what gets a consignment opened.

9. Samples and inspection

Order the sample, then actually fit it to the vehicle — the bench test tells you the part is made, the fitting tells you it is the right part. Keep a golden sample, and for bulk use an AQL sampling inspection covering dimensions against the drawing, marking and approval numbers, packing, and a function test on a sample. Do this before the balance payment, because the returns reality in this category is simple: nobody ships a hub-bearing assembly back to China.

10. Where to buy

• Ruian and the wider Wenzhou area (Zhejiang) — a dense cluster for automotive electrical parts, motorcycle parts and accessories.
• Yuhuan (Zhejiang) — precision machined components; good for turned and machined parts.
• Guangzhou — a large auto-parts wholesale district for the aftermarket trade; useful for seeing many suppliers in a day. See the wholesale markets guide.
• Shiyan (Hubei) — commercial-vehicle and truck parts, built around the local truck industry.
• Online — Alibaba and Made-in-China for English-language sourcing with escrow; 1688 via an agent for domestic pricing once the part number is settled.

Red flags

• A quote that answers your part number with "same same" instead of confirming it.
• Any famous brand's packaging from a factory that isn't that brand.
• Brake pads or discs with no approval marking, for a European market.
• LED retrofit bulbs sold as road-legal for halogen headlights.
• "Original genuine OEM" with no OEM number and no box.
• No IATF certificate, no test reports, and no batch codes.
• Emissions "delete" or emulator products, at any price.
• Bare metal parts quoted with no corrosion-protection packing.

Quick answers

• Are Chinese parts safe to sell? Many are made to a genuinely high standard; plenty aren't. The differentiator is supplier qualification and approval marks, not the country.
• Can I sell parts in branded boxes? Only if you are an authorised distributor of that brand. Otherwise you are importing counterfeits.
• How do I stop fitment returns? Buy by OEM number, verify with measurements, fit a sample, and publish your own compatibility list rather than copying the supplier's.
• Where did the parts listings go? The old marketplace is offline — see the marketplace status page.

For freight, incoterms and vendor vetting in general, see the shipping & sourcing guide. Other category guides: machines & equipment, general retail goods, solar, jewelry & watches.