Your total cost = engineering +shop install. The engineering certification component covers initial advice, assessment, testing and compliance sign-off. On top of that, a 4WD shop needs to supply and fit the actual suspension kit and any other required components; that install cost is separate and paid to the fitting shop, not the certifying engineer.
4WD shop install costs (parts and labour for suspension, brakes etc.) vary widely by vehicle and kit chosen. As a market guide: most common utes and 4WDs (Hilux, Ranger, D-Max, Patrol, 79 Series) run roughly $2,500–$10,000 fitted for the suspension kit and install, with premium builds (big lifts, coilover/air suspension, large American trucks) reaching well beyond that.
Heavy vehicles cost more to certify because they fall under VSB6 rather than VSB14 — a more involved standard covering additional testing (brakes, ESC, structural checks) that light vehicles don't require.
Get a quote from your shop for the physical work, then add our engineering certification fee (from $1,990 light / from $5,990 heavy) on top.
What affects your final price
01
Light vs heavy vehicle
Heavy vehicles require VSB6 certification, which involves more extensive testing than VSB14 for light vehicles.
02
Target GVM rating
A larger increase in rating may require more substantial suspension, brake or chassis upgrades.
03
Suspension components
Basic spring/coil upgrades cost less than premium suspension systems.
04
Brake upgrades
Higher GVM ratings often require brake upgrades to meet stopping distance requirements.
05
State-specific requirements
Some states add extra inspection or documentation steps on top of the national standard.
06
Pre-registration versus post-registration
Pre-registration is done before the vehicle is first registered, using the manufacturer's federal Second Stage Manufacture (SSM) approval. Certification is bundled into the kit price — generally the cheaper path.
Post registration is done on an already-registered vehicle, requiring individual engineering certification through your state's scheme.
Total cost = shop install + engineering certification
Light vehicle
Engineering: from $1,990 (VSB14)
Fit out cost: $2,500 - $10,000
Total: $5,000 - $15,000
Heavy vehicle
Engineering: from $5,990 (VSB6)
Fit out cost: $10,000 - $50,000
Total: $15,000 - $60,000
Related services
How much does a GVM upgrade cost?
Engineering certification cost breakdown for light and heavy vehicle GVM upgrades in Australia.
