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  • Family-owned with trusted service for all vehicles
  • One-stop shop for mechanical, electrical, & rego
  • Clear communication and reliable turnaround times

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4WD Specialists

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Authorised Inspection Station

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Diesel & Plant Experts

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Fleet Servicing Solutions

Wollongong Diesel Mechanic

If your diesel vehicle or machinery is underperforming, overheating, or not starting as it should, it’s time to bring it to the local experts. At Autochange Mechanical Repairs & Tyres, we provide professional diesel and plant mechanical services in Wollongong for tradies, fleet operators, and anyone working with heavy-duty engines. Whether you need diagnostics, engine repairs, or servicing for agricultural or construction machinery, our team delivers precision, power, and peace of mind.


We’re experienced in all makes and models of diesel vehicles, and our qualified diesel mechanic team handles everything from utes and vans to plant machinery and equipment. We’ll troubleshoot issues quickly and get your gear back in working order with minimal fuss.


  • Diagnostics & repairs for diesel vehicles
  • Plant & machinery servicing for work sites
  • Fast, reliable turnaround with expert support


Our Bellambi workshop is fully equipped to manage complex diesel systems, and our community-focused approach means we’ll always give you honest advice and clear solutions.


Call (02) 4285 5297 to book your diesel vehicle or plant equipment in for a service.

Your Motoring Partners

Performance-Driven Repairs

Diesel engines are built to handle tough conditions—but they also need expert care. Whether it’s a rough idle, fuel system problem, or complete loss of power, our team gets to the root of the issue quickly. We provide comprehensive inspections, fault-finding diagnostics, and mechanical repairs tailored to the demands of diesel systems.


Plant machinery, such as generators, loaders, and excavators, also require skilled maintenance to keep worksites safe and efficient. From minor fixes to full rebuilds, we’ll provide the right solution based on your schedule, usage, and budget. We keep communication open throughout every job, so you know exactly what’s happening and when.


  • Turbo, injector & cooling system repairs
  • Preventative servicing for plant equipment
  • Engine diagnostics & electrical troubleshooting



No matter what you drive or operate, we’ll work hard to ensure your diesel system performs at its best. Our qualified team delivers reliable results for diesel vehicles across Wollongong and beyond.

On-Site Plant Repair Services

At Autochange Mechanical in Wollongong, our highly trained team of plant mechanics and auto electricians is equipped to provide a range of different diesel and plant repair services. Designed to lessen downtimes and prevent the closure of sites due to broken-down equipment, we offer call-out services specifically for plant machinery. Whether it’s a mechanical issue, a necessary repair, or a sudden failure, our team is the ideal choice for fast, convenient plant and diesel repair for minimal disruption to your working day.

 

We offer our field repair services across the Wollongong area and have access to most major components and parts needed for on-site repairs. In many cases, we’re able to offer same-day repairs that are fast, efficient, and keep your site running without the need for long stretches of downtime.

Expert Diagnostics Minismise Downtime

Alongside offering fast repairs, our skilled team is also equipped with the latest diagnostic equipment and tools for up-to-date plant and diesel models. This means we can not only find the problem fast but also perform routine maintenance to keep your machines working better for longer. Regular diagnostics and checks prevent downtime from occurring in the first place, from maintaining cranes to keeping the air conditioning running perfectly.

 

For equipment beyond repair, we also provide a restoration and rebuilding service, bringing machinery back to life and usefulness. If you need maintenance for your plant vehicles, or you’d like to repurpose broken machinery, our team is the best choice for the job.

Frequently Asked Questions

  • What diesel vehicles and equipment do you service?

    We service a wide range of diesel-powered vehicles including utes, vans, trucks, and 4WDs, as well as plant machinery such as excavators, generators, and skid steers. If it runs on diesel, chances are we can service or repair it.

  • How do I know if I need a diesel mechanic?

    Look out for signs like hard starting, black smoke, poor acceleration, engine knocking, or decreased fuel efficiency. These could point to issues with the fuel injection system, turbocharger, or compression. Early inspection can prevent major engine damage.

  • Do you offer preventative maintenance for diesel engines?

    Yes. Regular maintenance helps prevent breakdowns, reduce long-term costs, and keep your engine running efficiently. We provide tailored service schedules based on the usage, operating conditions, and service history of your vehicle or machinery.