MOQ and Lead Time for Custom Harnesses from China
Forum threads are full of two frustrations: factories that want 500-piece minimums for a 40-piece job, and delivery dates that quietly slide by three weeks. Both have structural causes — here is how the numbers actually work, and what a buyer can do to keep them honest.
Why do factories ask for 500-piece minimums?
A custom harness is built to one drawing: specific wire colors, specific connector keys, a specific branch layout. Setting up a run — kitting wires, loading connector trays, programming the test — costs the same whether the run is 40 pieces or 4,000. Spreading that setup over 40 pieces doubles the unit price, which is why many high-volume plants simply decline small runs rather than quote a price the buyer will reject.
We run a separate low-volume track for replacement and specialty work: 50 sets per part number, mixed part numbers combined in one shipment. The setup logic is the same; we simply absorb it into a small-batch pricing model that exists for this exact business.
How long should each stage actually take?
These are our working numbers — and the honest ranges behind them.
| Stage | Our time | What the time is made of |
|---|---|---|
| Quotation | 24 hours | Direct — no trading-company round trip |
| Drawing (from sample or VIN) | 3 days | Reverse-engineering every circuit and connector |
| Your drawing approval | Your clock | Fast approvals are the single biggest schedule saver |
| First sample | 7–10 days | Kitting, build, 100% test, photos before dispatch |
| Sample shipping | 5–8 days | Courier, door to door |
| Production batch | 25–30 days | Material in, build, 100% test, pack, export docs |
The sample stage exists to protect you. A sample approved against the drawing is the reference every production unit is judged against — skipping or rushing it is how batch problems happen.
"Why did my delivery date slip three weeks?"
Slipped dates usually trace to one of four causes, and none of them are mysterious:
- Connector availability — original-brand connectors (Sumitomo, Yazaki, TE, Aptiv) have their own lead times; lookalike substitutes are faster but cause field failures
- Late drawing changes — a revision after approval restarts kitting and retesting
- Production queue depth — real factories schedule by line load; promises made without checking the line are the ones that break
- Shipping windows — ocean schedules slip in peak season; the factory date and the arrival date are different promises
How do I keep a small order on schedule?
Small orders slip for the same reasons big ones do, plus one more: they get bumped by larger runs when something has to give. Three habits keep a small order honest.
- Approve the drawing fast — most sample-stage delay is approval latency on the buyer side
- Lock the connector choice early; original-brand availability is the longest lead item in the BOM
- Order the reorders before the first batch runs out — a repeat order against an existing drawing skips most of the front-end time
Is a Chinese factory realistic for 50-piece orders?
For catalogue-style commodity harnesses, probably not — minimums there are structural. For replacement, specialty-vehicle and low-volume production work, it is exactly what our low-volume track was built for: 50 sets per part number, mixed part numbers in one shipment, the drawing kept on file so reorders run without setup.
Upside vehicles, conversions, fleet maintenance and dealer-alternative supply all live in this volume band. If your quantities live there too, ask for both a sample cost and a 50-set price in the same enquiry — you will have the full economics within 24 hours.
Questions buyers actually ask
What is the minimum order quantity for custom harnesses?
50 sets per part number on our low-volume track, with mixed part numbers combinable in one shipment. High-volume program work is quoted separately.
How long from order to delivered sample?
7–10 days to build and test the sample, plus 5–8 days door-to-door courier. Drawing rebuilding adds about 3 days if you started without a drawing.
How long is production lead time?
25–30 days from drawing approval to export-ready shipment for typical replacement and low-volume batches. Dates are quoted from actual line load.
Why do harness suppliers' delivery dates slip?
Usually connector availability, late drawing revisions, queue depth or shipping windows. Ask which stage your order is in — photos at material-in, first-article and packing make the answer verifiable.
Send the drawing. Get a quote and a sample date inside 24 hours.
Email a photo of the OEM label, a pin-out or the old loom itself. Our engineers will confirm fitment, circuit count and connector family, then send a quote and a sample date within 24 hours. Samples ship in 7–10 days; production takes 25–30 days.