Frequently Asked Questions

MOQ varies by product family. For stock SKUs (pistons, gasket kits, water pumps) MOQ starts at 200 sets. For custom OEM/ODM programs the practical economic MOQ is typically 500-1,000 units. Smaller trial orders are often possible for new accounts — talk to your account manager.

We quote on an FOB Ningbo basis by default and tier pricing by volume. Larger orders unlock additional discounts. Sea freight, insurance and import duties can be added on CIF/DDP requests. All prices include standard export packaging unless private packaging is specified.

For new accounts: 30% T/T deposit, 70% balance before shipment, or 100% irrevocable L/C at sight. For established accounts: open account terms (30-60 days) are negotiable based on order history. We also support Western Union and Alibaba Trade Assurance for sample orders.

Yes. Our tier-pricing structure rewards higher volumes. 20' containers, 40' containers and annual contract commitments each unlock progressively better unit pricing. Annual capacity-reservation agreements are available for OEM partners.

For stock SKUs, samples are free — you pay only the courier (DHL/FedEx/UPS) which is typically USD 40-80 to Europe or North America. For custom OEM samples requiring tooling, sample costs depend on the tooling complexity and are credited against your first production order.

Stock SKUs: 3-7 days from order confirmation to courier handover. Custom prototypes: 14-21 days depending on geometry. Express courier transit adds 3-5 business days to most EU/US destinations.

Our factory holds IATF 16949:2016 (automotive), ISO 9001:2015 (quality), and ISO 14001:2015 (environmental) certifications. We also provide REACH, RoHS and CE compliance documentation where applicable. Test certificates are available with each shipment on request.

Absolutely. We host third-party inspections monthly — SGS, BV, TÜV, Intertek, and buyer-direct QA teams. Our quality engineers will accompany them, provide audit-ready documentation, and answer any questions on the floor.

Stock SKUs: 15 days production + shipping time. Custom OEM programs: 25-35 days for serial production after first-article approval. Peak-season (Aug-Oct) may add 5-10 days; we'll always confirm in writing before order acceptance.

Default: FOB Ningbo. We also ship from Shanghai, Qingdao and Tianjin when freight is more economic from those ports. Direct rail to Hamburg, Duisburg and Łódź is available for European buyers — about 18-22 day transit.

Yes. We have established DDP partnerships into Germany, France, Netherlands, UK, US, Canada and Mexico. We handle freight, insurance, customs, duties and last-mile delivery to your warehouse. All documentation in English.

Commercial Invoice, Packing List, Bill of Lading, Certificate of Origin (Form A, EUR.1, Form B), MSDS (where applicable), Certificate of Conformance, and a quality test report. We have customs-broker partnerships in the major EU and US ports.

Yes. Send drawings (DWG, STEP, IGES or PDF) under our mutual NDA. Our engineering team reviews, suggests DFM improvements, and quotes tooling and unit cost within 5 business days. First-article delivery is typically 8-12 weeks from PO.

Yes — private label is a standard service. Your logo, multi-language inserts, custom barcodes, holographic anti-counterfeit seals and color-coded packaging are all available. We have an in-house print shop to keep MOQs low.

Yes. We sign a mutual NDA before receiving any drawings. Custom tooling is stored in our secure tooling vault and is contractually yours — we will not produce parts from your tooling for any other customer. Tooling transfer to another factory is available on request.

Standard warranty: 12 months from B/L date or 30,000 km, whichever first. Defect rate guarantee: ≤0.5% for stock SKUs, ≤0.3% for OEM programs. Custom warranty terms negotiable for OEM contracts. RMA issued within 48 hours of report.

Notify your account manager with photos and batch ID within 14 days of arrival. We arrange independent re-inspection if needed. Confirmed defects are either replaced free of charge on the next shipment, credited against your next order, or refunded — your choice.

Yes. Each B2B customer has a named account manager + engineering contact for the lifetime of the relationship. We respond to technical queries within 24 hours and provide installation guidance, cross-reference checks and aftermarket fitment support.

Yes. For urgent replacements we use air freight (DHL, FedEx, UPS) — typically 3-5 day transit to major EU/US destinations. Urgent shipments are usually arranged within 24-48 hours of confirmation.