Heavy Vehicles - Approved Mods

Heavy Vehicle Modifications & Certification

Keep your fleet compliant and on the road with Approved Mods. We provide engineering inspections and certification for heavy vehicles including trucks, buses, and commercial fleets.

Our services help fleet operators, workshops, and modifiers ensure every vehicle meets Queensland’s heavy vehicle standards and ADR requirements. From brake and suspension upgrades to body modifications and GVM increases — we handle it all with precision and professionalism.

Learn more about our Approved Vehicle Services or contact us to book your inspection today.
For official information, see the Queensland Department of Transport and Main Roads (TMR) website.

Note: Some of these codes require significant testing and engineering works and we reserve the right to not undertake this work.

Engine and ancillaries

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Section A – Engine and ancillaries

A1: Engine substitution
A2: Air cleaner substitution or additional fitment
A3: Turbo charger installation
A4: Exhaust system alteration
A5: Road speed limiter installation

Transmission mods

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Section LB – Transmissions

LB1: Transmission substitution
LB2: Rear axle substitution

Tail shaft modification

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Section LC – Vehicle Controls

LC1: Dual-controls for driver trainer vehicles (design)
LC2: Dual-controls for driver trainer vehicles (modification)
LC3: Vehicle controls for persons with a disability (design)
LC4: Vehicle controls for persons with a disability (modification)

Rearr axles

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Section LG – Brakes

LG1: Brake system conversion (design)
LG2: Brake system conversion section
LG3: Relocation of air brake components
LG4: Non-Standard brake system certification
LG5: Fitting of Auxiliary and Endurance Brakes
LG6: Fitting of air operated accessories

Front axle, steering wheels and tyres

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Section LH – Body and Chassis

LH1: Roof conversion (design)
LH2: Roof conversion
LH3: Modified wheelbase conversion (design)
LH4: Modified wheelbase conversion
LH5: Vehicle construction (design)
LH6: Vehicle construction
LH7: Body/chassis variants conversion
LH9: Street rod certification (concessional)—find out more in the QCOP
LH10: Street rod certification (full)—find out more in the QCOP
LH11: Campervan, motorhome conversion section
LH13: Chassis Alteration (Design Certification)
LH14: Chassis Alteration (Modification Certification)

Suspension mods

We cer

Section LK – Seating and occupant protection

LK1: Seat and seatbelt installation/removal
LK2: Seat and anchorage certification
LK3: Wheelchair Accessibility
LK6: Child restraint anchorage installation
LK8: Construction and installation of one-off roll-bars and roll-cages by individuals
LK9: Design and manufacture of commercial aftermarket roll-bars, roll-cages and other types of roll-over protection systems (ROPS)
LK10: Installation of aftermarket roll-bars, roll-cages and ROPS section

Brakes

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Section LL—Modifications to motorcycles

LL1: Modifications to motorcycle (LC) to motor tricycle (LEM1)

Chassis

We inspect

Section LM—Fuel systems

LM1: Fuel tank installation section

Body mounting

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Section LO—Vehicle standards compliance

LO1: ADR compliance
LO2: ICV passenger cars and derivatives
LO3: Personally imported vehicle compliance
LO4: ICV LEM1 tricycle
LO5: ICV LEP1 tricycle
LO7: ICV motorcycle

Cabin

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Section LR- Installation of Vehicle Mounted Lifting System

LR1: Installation of Vehicle Mounted Lifting System

Fuel systems

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Section LS—Tyres, rims, suspension and steering

LS1: LHD vehicle steering conversion (design)
LS2: LHD vehicle steering conversion
LS3: Front suspension and steering modification (design)
LS4: Front suspension and steering modification
LS5: Rear suspension modification (design)
LS6: Rear suspension modification
LS9: High lift – up to 150mm (design certification)—find out more in the QCOP
LS10: High lift – up to 150mm modification certification—find out more in the QCOP
LS11: Gross vehicle mass re-rating—find out more in the QCOP
LS12: Light trailer modifications—find out more in the QCOP
LS14: Re-rating of Aggregate Trailer Mass (ATM)/Gross Trailer Mass (GTM) of a light trailer to manufacturer’s specifications—find out more in the QCOP
LS15: Gross vehicle mass rating of light vehicles—find out more in the QCOP
LS16: Gross combination mass re-rating—find out more in the QCOP

Tow couplings

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Section LT—Test procedures

LT1: Beam and torsion tests
LT2: Lane change manoeuvre test
LT3: Exhaust emissions – IM240 test
LT4: Noise test

Vehicle mounted lifting systems

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Section LV—Alternative power units

LV1: Installation of electric drives in motor vehicles

Vehicle rating

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Section LX—TMR individual approval

LX1: Modification of light vehicles to the Department of Transport and Main Roads individual approval

Tow truck modification

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Section LV—Alternative power units

LV1: Installation of electric drives in motor vehicles