EDI Onboarding with a New Automotive Customer: A Practical Checklist

VDA EDI Tools Blog · 2026-09-29

"Please set up EDI with us" usually arrives as a short email with a big PDF attached. This checklist is the distilled version of what happens next, in the order that wastes the least time.

Phase 1 - Collect the facts

• Get the plant-specific message implementation guides for every message in scope (usually 4984 inbound, 4987 outbound, invoicing later). The generic VDA recommendation is not enough.
• Identify the transport channel: OFTP2 direct, or an EDI service provider / VAN? Who pays?
• Collect codes: your supplier number, their plant codes, unloading points, dock codes - the values that go into NAD/LOC segments.
• Clarify label requirements: VDA goods tag (4902) version, printer, and who assigns label number ranges.

Phase 2 - Build the mapping

• Map your ERP fields to the guideline's segments - start with the mandatory set (BGM, the three DTM dates, NAD parties, weights, LIN/QTY).
• Decide the packaging model: how do your pallets and boxes map to CPS levels and PAC types?
• Build the label-number logic (PCI/GIN) together with shipping - it must match the physical tags.

Phase 3 - Test

• Validate every test file structurally before sending it anywhere - a validator catches date formats, missing segments and broken control counts in seconds.
• Run the customer's official test phase: send test DESADVs against real delivery notes, receive test DELFORs.
• Print physical labels and have the customer scan-test them - a perfect message with an unscannable label still blocks the gate.

Phase 4 - Go-live

• Start with one plant / one material before the full rollout.
• Monitor the first weeks daily: rejections usually cluster in the first shipments.
• Keep the guidelines versioned - OEMs update them, and "we always did it this way" breaks silently after an update.

The traps that bite most suppliers

1. Mapping to the generic VDA document instead of the OEM's own guideline.
2. Forgetting that date/quantity formats are strict (CCYYMMDD, numeric only, no German decimal comma).
3. Treating the test phase as a formality - it is where every assumption gets falsified for free.
4. Label numbers that look right on screen but do not match what is printed on the goods tag.

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