How to Check Your BYD's Real Build Date (Nameplate, VIN and Paperwork)

Your BYD's build date is not printed on the vehicle nameplate. It is recorded as "Date of manufacture" in your Vehicle Warranty Certificate and in government registration records. Use the nameplate and VIN to confirm which car you are checking, then match those against your paperwork.

Plenty of news reports told Australian owners a build year problem exists. Almost none told them where to look. Every location below is checked against the official BYD owner's manual for each model.

At a glance

Measurement	What it tells you	Where to find it
Date of manufacture	The real build date	Vehicle Warranty Certificate; state rego records
Vehicle nameplate	VIN, company name, mass ratings, certificate number	Sheet metal below the B-pillar (side varies by model)
VIN (attached labels)	Unique vehicle identity, up to 8 locations	Windscreen sill, door sills, bonnet, boot, bumper beam
VIN (engraved)	Tamper-resistant identity confirmation	Lower beam under a front seat
Date of sale	When your warranty clock started	Warranty Certificate; purchase invoice

What the build year mix-up actually was

In July 2026, BYD Australia offered full refunds to more than 1,200 customers who bought vehicles sold as 2026 builds that were in fact built in 2025. Around 1,265 buyers were affected across models including the Atto 3, Sealion 8 and Shark 6.

The cause was a data entry problem, not a manufacturing one. BYD's customer system recorded the date each vehicle left the factory rather than the date it was actually built. That wrong figure then flowed through to dealer systems and sales documents.

Two details matter for owners:

• Government registration records reportedly carried the correct manufacturing date the whole time.
• The vehicles themselves were unaffected. Same hardware, same compliance, same warranty.

The concern is resale value on paper, not the car in your driveway.

The nameplate does not carry a build date, and that is the part everyone gets wrong

Plenty of advice online tells owners to photograph the B-pillar nameplate to read their build date. That advice is wrong for BYD.

The Sealion 6 manual is the only one in the range that itemises what the nameplate contains: company name, certificate number, VIN, total mass, trailer mass, and maximum allowable front and rear axle masses. There is no date field, and no other BYD manual lists one either.

So what is the nameplate good for? Identity. It confirms the VIN and model designation for the exact car in front of you, which is what you then check your paperwork against. BYD's warranty documentation makes this explicit: the model on your warranty certificate must match the model on your nameplate.

Where the nameplate sits on your model

All of these are taken directly from the relevant owner's manual. Note that the Song Plus DM-i is the odd one out.

Model	Nameplate location (per owner's manual)
Atto 1	Sheet metal panel below the right B-pillar
Atto 2	Under the right B-pillar
Atto 3	Under the B-pillar (manual does not state a side)
Dolphin	Metal sheet on the lower part of the right B-pillar
Han	Lower part of the left or right B-pillar; illustration shows right
Seal	Lower sheet metal recess of the right B-pillar
Sealion 5	Under the right B-pillar
Sealion 6	Below the right B-pillar lock ring
Sealion 7	Lower part of the right B-pillar
Sealion 8	Lower part of the right B-pillar
Shark 6	Under the right B-pillar
Song Plus DM-i	Under the left B-pillar lock ring

Open the relevant front door fully and look at the vertical pillar between the front and rear doors, down near the striker. Photograph it in good light.

Reading the VIN, and what it will not tell you

Your VIN appears in up to eight attached positions depending on model, typically the windscreen cross sill, bonnet inner panel, door sills, boot lid, wheel arch and front bumper beam. It is also engraved in one tamper-resistant spot.

• Atto 2, Atto 3, Han, Sealion 7 and Shark 6: engraved on the lower beam under the front passenger seat.
• Dolphin: engraved on the lower beam under the driver's seat.

You can also read the VIN on screen after a workshop connects a diagnostic tool, which shows it in the top right corner of the display.

Here is the honest limitation. No BYD owner's manual in this range explains how to decode the VIN, and none identifies a character that represents a build year. If someone tells you a specific digit gives you your build month, that is not something BYD documents for owners. Treat the VIN as an identity key, not a date stamp.

Cross-checking against your paperwork

This is where the actual date lives. Your Vehicle Warranty Certificate has separate fields for date of manufacture, date of sale and date of delivery. They are deliberately different fields, and confusing them is exactly what caused the problem in the first place.

A useful reassurance while you check: BYD's warranty period is calculated from the date of sale, meaning the date your purchase invoice was issued, not from the date of manufacture. An earlier build date does not shorten your warranty. If you are weighing that up, our comparison of how BYD's warranty cover stacks up against Tesla's puts the terms side by side.

Work through these four sources in order:

• Vehicle nameplate: photograph it, note the VIN and model.
• Warranty Certificate: check the VIN matches, then read the date of manufacture field.
• State registration papers: your rego certificate or state transport portal carries the officially recorded build date.
• Sales contract and invoice: compare the build year stated at point of sale.

If your dates do not match

Do not panic and do not start a resale listing yet. Take these steps.

1. Photograph the nameplate, the warranty certificate page and your rego document together, with the VIN legible in each.
2. Contact your delivering dealer first, not the general enquiries line. They hold the transaction record.
3. Ask specifically for the government-recorded date of manufacture for your VIN, since that is the authoritative figure.
4. Put the request in writing, so you have a dated trail if you later need to escalate.
5. Keep driving the car. Nothing about a build year discrepancy affects safety, compliance or servicing.

If your car turns out to be fine, it is worth knowing that ordinary delays are normal in this market. Our guide to how long BYD orders are currently taking to arrive in Australia explains why a car can sit built for months before delivery, which is precisely the gap that caused this confusion.

Common mistakes

• Assuming the nameplate shows a build date. It carries identity and mass data, not a date.
• Confusing build date with compliance or delivery date. Three different things, three different records.
• Checking the wrong B-pillar. Most models use the right side, but the Song Plus DM-i uses the left.
• Trusting an online VIN decoder as proof. Third party decoders are not authoritative and BYD does not document VIN year coding.
• Worrying the warranty is shortened. It runs from the date of sale, not manufacture.
• Only checking the sales contract. That is the document the error lived in. Check the independent records instead.