• Mobile mechanical service available across North Queensland
  • Servicing all diesel makes, models & machinery types
  • Fully qualified & ARC-approved technicians you can trust

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A man is working on a car engine in a garage — OG Diesel NQ in Garbutt, QLD

Townsville Heavy Vehicle Mechanic

When you’re operating trucks or trailers for work, breakdowns don’t just cause delays—they cost money. Our heavy vehicle mechanic services at OG Diesel NQ in Townsville are designed to keep your fleet moving and compliant. Whether it’s a rigid body truck, B-double or plant trailer, we service all makes and models to the highest safety and performance standards. From roadworthiness checks to driveline repairs, we offer a one-stop solution to reduce downtime and keep your business running.


  • Fleet servicing & heavy-duty repairs
  • Fast turnarounds to reduce vehicle downtime
  • Qualified team, certified inspection station


We understand the pressure that comes with running commercial and heavy vehicles, which is why we offer clear communication, reliable turnarounds and quality workmanship on every job. Call 07 4426 3771 to book servicing or repairs with our Townsville team.

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Servicing, Repairs & Fleet Support

Heavy vehicles need more than just basic maintenance—they need a mechanic who understands high-load systems, compliance requirements and the critical role uptime plays in your operation. From clutch replacements and brake systems to cooling and suspension work, we service both light and heavy-duty vehicles across a wide range of applications. Whether you're a sole operator or managing a fleet, we help you stay on top of inspections, repairs and preventative maintenance.


  • Trailer inspections, brakes & bearings
  • Driveline, cooling & suspension servicing
  • Engine & gearbox repairs for trucks


With mobile servicing and after-hours options available, we make it easy to get the support you need, when you need it.

A White Truck With a Fence on the Back is Parked in a Garage — OG Diesel NQ in Garbutt, QLD

Frequently Asked Questions

  • What qualifies as a heavy vehicle in Queensland?

    In Queensland, a heavy vehicle is typically any vehicle with a Gross Vehicle Mass (GVM) over 4.5 tonnes. This includes trucks, B-doubles, road trains, and some commercial trailers. These vehicles require specific licensing, inspection schedules and compliance checks, which means choosing a qualified heavy vehicle mechanic is essential.

  • How often should heavy trucks and trailers be serviced?

    Service intervals depend on the vehicle’s usage, but most heavy vehicles require servicing every 10,000–20,000 km or at set time intervals (e.g., every 3–6 months). Vehicles used for long-haul or commercial operations often benefit from more frequent inspections, especially of tyres, brakes, and suspension.

  • Do trailers require inspections and certification?

    Yes. Registered trailers over 750kg GVM typically require safety certificates, and commercial trailers may be subject to annual inspections. Bearings, brakes and lights are often key inspection points. Staying compliant ensures safe operation and avoids fines or downtime.