Notify VicRoads of changes and modifications

If the description of your vehicle has changed as a result of modifications, VicRoads must be notified before the vehicle can be used on a road*. 

 

Heavy vehicles

If a different body type has been fitted to the vehicle (e.g. tray to van, converted to a tow truck) the following documents are required:

VicRoads will need to inspect the vehicle to confirm the modification(s). Please attend a VicRoads Customer Service Centre that provides heavy vehicle inspections. No appointment is required. 

If you have any questions, call us on 13 11 71.

Light vehicles

If:

  • a different body type has been fitted to the vehicle (e.g. tray to van), and/or
  • the vehicle's chassis has been replaced (this only applies to vehicles that have a separate chassis. Evidence is required when the chassis rail has been replaced)

the following documents are required:

VicRoads will need to inspect the vehicle to confirm the modification(s). Please attend a VicRoads Customer Service Centre that provides vehicle inspections. No appointment is required.

If you have any questions, call us on 13 11 71.

Note: A motorcycle’s frame cannot be replaced. This applies to both the modification process and/or repairing a written-off vehicle.

Convertible units

A convertible unit is a vehicle that has been modified to operate in multiple body type configurations so it can perform multiple functions. When VicRoads approves a convertible unit, it allows the operator to interchange the vehicle to the approved configurations/functions. 

Examples of convertible units include:

  • heavy vehicles fitted with a 'quick release' mechanism that allows the vehicle to be readily changed from a prime mover to a tipper or tray body (and vice versa)
  • light motor vehicles with variable seating capacity
  • motorcycles operated with or without a sidecar.

The following documents are required:

VicRoads will need to inspect the vehicle in both configurations to confirm the modification(s). Please attend a VicRoads Customer Service Centre that provides heavy vehicle inspections. No appointment is required.

If you have any questions, call us on 13 11 71.

VicRoads will issue a letter to the registered operator listing each of the vehicle's configurations. This letter must be kept in the vehicle at all times.

You must notify VicRoads of a change of colour of the vehicle.

No vehicle inspection is required.

Notify VicRoads by calling 13 11 71.

There are three scenarios that could apply when changing an engine.

Change of engine scenario one: 

  • The replacement engine is identical to the original engine.
  • The replacement engine is an option allowed by the manufacturer for the same model vehicle.

Documents required:

  • if the engine is optional to the original, a signed declaration is needed from the registered operator, motor mechanic, dealer of that make of vehicle or automotive engineer, certifying that the engine is optional for the vehicle model, and that all modifications made by the manufacturer for the same vehicle model with that optional engine have been completed
  • a completed change of vehicle details form [PDF 68 Kb].

VicRoads will need to inspect the vehicle to confirm the new engine details. Please attend a VicRoads Customer Service Centre that provides vehicle inspections. No appointment is required.  

Note: The optional engine must be offered in Australia by the vehicle manufacturer as an option for that vehicle (or certified variants).

Change of engine scenario two:

  • The replacement engine is not of a type offered by the vehicle manufacturer as an option for that vehicle.
  • Alterations or changes are made to the vehicle's frame or structure, and/or specially fabricated supports or structures are used.

Documents required:

VicRoads will need to inspect the vehicle to confirm the new engine details*. Please attend a VicRoads Customer Service Centre that provides vehicle inspections. No appointment is required. 

Change of engine scenario three:

  • The replacement engine is not of a type and/or make offered by the vehicle manufacturer as an option for that vehicle, but is equivalent in general configuration, power, mass and emissions standard to the original or optional engine for the vehicle model, and can be installed without any structural alterations.

Documents required:

  • a signed declaration from the registered operator, motor mechanic, dealer of that make of vehicle or automotive engineer, certifying that all modifications made by the manufacturer for the same vehicle model with that engine have been completed. A VASS approval certificate from a VicRoads’ vehicle assessment signatory can be provided instead of a signed declaration.
  • a completed change of vehicle details form [PDF 68 Kb] providing new engine details

VicRoads will need to inspect the vehicle to confirm the new engine details*. Please attend a VicRoads Customer Service Centre that provides vehicle inspections. No appointment is required. 

*If you provide a certificate of roadworthiness or VASS approval certificate, including the new engine number, the vehicle's engine will not be inspected (this only applies to currently registered Victorian vehicles).  

Note: When a VASS approval certificate has been supplied for a replacement engine, then an equivalent replacement engine can be fitted without another VASS approval certificate being presented (e.g. 350 c.i. V8 engine replaced with 350 c.i. V8 engine).

All Liquid Petroleum Gas (LPG) and Compressed Natural Gas (CNG) installations must comply with the relevant technical requirements of the Australian Standard current at the time of conversion.

The structural integrity of the vehicle and its continued compliance with standards of registration must not be adversely affected by the installation as this is considered an approved modification, and the vehicle doesn't require an inspection by VicRoads.

LPG conversions

If the vehicle was converted on or after 1 February 1993, an approved AS 1425 LPG compliance plate must be fitted to the vehicle at the time of the conversion. Vehicles fitted with LPG systems are required to have an 'LP Gas' plate attached to the vehicle number plates, including bike rack number plates.

CNG conversions

All Compressed Natural Gas (CNG) installations must comply with the technical requirements of the Australian Standards AS 2739 current at the time of conversion. If the vehicle was converted to CNG after 1 August 2000, an approved AS 2739 CNG compliance plate must be fitted to the vehicle at the time of the conversion.

Notifying VicRoads

Documents required:

  • an LPG/CNG conversion report [PDF 235 Kb] signed by a converter registered with the Automotive Alternative Fuels Registration Board, other recognised state and territory authorities, or approved volume manufacturers such as Holden, Ford etc.
  • a VASS approval certificate *.

Submit these form(s) to VicRoads by:

No inspection of the vehicle by VicRoads is required.

* Note - If significant alterations are made to the structure of the vehicle, an engineering assessment of the effects is required. If the installation of the tank affects one or more of the existing mandatory child restraint anchorage points, acceptable replacements must be installed. A VASS report will be required for any replacement child restraint anchorage points. 

View removing, adding and replacing seats for more information.

 

If major modifications have been performed to the vehicle, which has changed its tare mass, a weighbridge certificate must be provided to VicRoads so that the correct tare mass of the vehicle can be recorded.

 

Higher gross vehicle mass

If a higher Gross Vehicle Mass (GVM) is to be recorded, a VASS approval certificate from a VicRoads’ Vehicle Assessment Signatory* or an original letter from the vehicle's manufacturer is required.

The letter must identify the vehicle by the Vehicle Identification Number (VIN). A change of vehicle details form [PDF 68 Kb] must also be completed. A higher registration fee may apply when the change is recorded on VicRoads register.

Lower gross vehicle mass

A lower GVM can only be recorded if a change is made to the vehicle specification. Downgrading vehicle specifications to establish a lower GVM is acceptable when:

  • the manufacturer offers the identical vehicle at the lower GVM (original letter from the vehicle manufacturer identifies the vehicle by VIN)
  • a vehicle is fitted with a compliance plate showing several GVM's, or
  • a current VASS approval certificate is supplied from a VicRoads’ vehicle assessment signatory*, approving the specification changes.

Vehicle operators must not alter vehicle specifications that make the vehicle unroadworthy or result in the vehicle no longer complying with registration standards (e.g. fitting tyres with lower play ratings). In this situation, tyres can't be fitted that are less than the minimum specification required by the vehicle manufacturer and specified on the vehicle's tyre placard.

VicRoads will not record a lower GVM if the vehicle no longer meets the standards for registration or is believed to be unroadworthy.

A change of vehicle details form [PDF 68 Kb] must be completed. A lower registration fee may apply for heavy vehicles if GVM is lowered.

* Note: If the vehicle’s modified GMV is greater than 4.5 tonne, either a VASS approval certificate or an approval certificate from an approved vehicle examiner (AVE) (External link) can be provided.

When you modify or add components to vehicles, you must ensure that the vehicle continues to comply with registration standards, and the modification or addition is acceptable to VicRoads before performing the addition or modification. You may need to provide documentation about these changes.

A guide to whether modifications are acceptable or not is contained in vehicle standards information and VSI8 - Guide to modifications for motor vehicles [PDF 286 Kb].

Some modifications, including structural alterations to a vehicle's body or chassis, braking system or fitments of an engine not offered by the vehicle manufacturer as an option for that vehicle, may require a VASS approval certificate from a VicRoads VASS signatory and a VicRoads inspection. 

Changes or modifications include:

  • change of vehicle body
  • a different colour
  • a different engine, engine size or type
  • LPG or CNG conversion
  • adding or removing seats
  • change to the vehicle’s recorded tare mass
  • amending the gross vehicle mass (GVM) of the vehicle.

Check the section below for VicRoads contact details and how to access vehicle standards information.

* Road refers to road or road related area, including: car parks, access roads and other areas that are open to be driven on by the public.

For information on our vehicle modification guidelines:

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