# Modified Vehicle Approval WA

> Western Australia approves modified vehicles through its own Department of Transport process, typically involving an automotive consultant and a vehicle examination. Interstate engineering certificates do not remove the need for WA's own approval.

Source: https://modvault.com.au/guides/wa-modified-vehicle-approval/
Last checked: 2026-08-24

## Key facts

- **Jurisdiction:** Western Australia (WA)
- **Scheme:** Department of Transport vehicle examination and approval (Direct DoT approval)
- **Who certifies:** Automotive consultant
- **Authority:** Department of Transport — https://www.transport.wa.gov.au/
- **Validity:** Vehicle examination recorded permanently
- **Plate / record:** Permit or approval recorded against the vehicle after examination

## WA runs its own process

Unlike states that delegate certification to licensed private signatories, Western Australia keeps approval within the Department of Transport, typically involving an automotive consultant and a physical vehicle examination.

The practical consequence: an interstate certificate is supporting evidence, not a substitute. Plan for a WA examination even if the car arrives fully engineered.

## What to bring to an examination

Examinations go faster when the evidence is complete: the original interstate certificate if one exists, parts specifications and compliance documents, staged photographs of the work, and receipts identifying who performed it. Turning up with the car and nothing else is what turns one appointment into three.

## Frequently asked questions

### Do I need a new approval in WA if my car is already engineered interstate?

Generally yes. WA requires its own approval process even where an interstate certificate exists, though the existing documentation helps.

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This guide is general information for Australian vehicle owners, not legal or engineering advice. Requirements change and are applied at the discretion of your state authority. Always confirm with your road authority or a licensed certifier before starting work.