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Describe the job once and we'll match it with up to 3 diesel mechanics in Thornlie.

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Diesel Mechanics in Thornlie WA

12 diesel mechanics

About these results

Based here first, then diesel mechanics by rating, then related trades.

A business is Featured only when it holds our Featured plan; Featured is a listing plan, not a rating.

12 diesel mechanics based in or serving Thornlie; listings updated 7 Oct 2026.

  1. Based nearby, serving Thornlie

    These businesses aren't based in Thornlie but list it as a service area.

  3. Euro Diesel Services Pty Ltd

    Diesel Mechanics

    Based in Maddington WA · serves Thornlie

    Directions View profile Serves this area

    Diesel engine repair and rebuild specialist in Maddington, WA, servicing industrial diesel engines and supplying genuine parts.

    • Expert Repairs & Rebuilds
    • Complete engine strip-down and inspection
    • Cylinder head reconditioning and pressur…

    Based in Maddington WAServes Thornlie

    Closed · opens tomorrow 7:30 am

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  4. Hawkdiesel

    Diesel Mechanics

    Based in Maddington WA · serves Thornlie

    Directions View profile Serves this area

    Diesel mechanic in Maddington, WA, servicing and repairing US trucks and Detroit Diesel engines, including engine rebuilds and brake work.

    • Detroit Diesel engines
    • Brake repairs
    • Engine rebuilds

    Based in Maddington WAServes Thornlie

    Closed · opens tomorrow 7:30 am

    Get a quote

  5. Advanced Driveshaft Services (Driveline Services Australia)

    Mechanics, 4x4, Diesel Mechanics

    Based in Canning Vale WA · serves Thornlie

    Directions View profile Serves this area

    Driveshaft specialist in Canning Vale, WA, repairing and manufacturing driveshafts for cars and trucks, plus springs and general auto repairs.

    • Transmission and gearbox repairs
    • Truck and bus repairs
    • 4x4 suspension

    Based in Canning Vale WAServes Thornlie

    Closed · opens tomorrow 8:00 am

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  6. Applied Automotive Engineering

    Mechanics, Diesel Mechanics

    Based in Maddington WA · serves Thornlie

    Directions View profile Serves this area

    Engine reconditioner and diesel mechanic in Maddington, WA, for engine rebuilding and diesel repairs.

    • Exhaust, cooling and engine repairs

    Based in Maddington WAServes Thornlie

    Closed · opens tomorrow 7:30 am

    Get a quote

  7. Diesel Torque Mechanical Services

    Mechanics, Diesel Mechanics

    Based in Maddington WA · serves Thornlie

    Directions View profile Serves this area

    Diesel engine specialists in Maddington, WA, handling mechanical repairs and maintenance for diesel vehicles.

    Based in Maddington WAServes Thornlie

    Closed · opens tomorrow 9:00 am

    Get a quote

  9. Maddington Central Automotive

    Mechanics, Auto Electricians, Tyres, Diesel Mechanics

    Based in Maddington WA · serves Thornlie

    Directions View profile Serves this area

    Auto repair workshop in Maddington, WA, handling brake and clutch work, gearbox repairs, air conditioning and vehicle inspections.

    • Brake and clutch repairs
    • Transmission and gearbox repairs
    • Car air conditioning

    Based in Maddington WAServes Thornlie

    Closed · opens tomorrow 7:30 am

    Get a quote

  10. Perth Truck & Plant

    Mechanics, Diesel Mechanics

    Based in Langford WA · serves Thornlie

    Directions View profile Serves this area

    Mobile diesel and hydraulic repairer in Langford, WA, working on trucks and plant on-site.

    • Truck and bus repairs

    Based in Langford WAServes Thornlie

    Closed · opens tomorrow 7:30 am

    Get a quote

  11. T.T. Auto Services

    Mechanics, Diesel Mechanics, Caravan Repairs

    Based in Canning Vale WA · serves Thornlie

    Directions View profile Serves this area

    Auto repairer in Canning Vale, WA, handling car and truck repairs, brake work and diesel engine maintenance.

    • Brake and clutch repairs

    Based in Canning Vale WAServes Thornlie

    Closed · opens tomorrow 7:30 am

    Get a quote

  12. The Engine Shop

    Mechanics, Diesel Mechanics

    Based in Canning Vale WA · serves Thornlie

    Directions View profile Serves this area

    Engine reconditioning and diesel work in Canning Vale, WA, for petrol and diesel engines.

    • Exhaust, cooling and engine repairs

    Based in Canning Vale WAServes Thornlie

    Closed · opens tomorrow 8:00 am

    Get a quote

  13. Thor Diesel Services

    Mechanics, Diesel Mechanics

    Based in Maddington WA · serves Thornlie

    Directions View profile Serves this area

    Diesel workshop in Maddington, WA, working on diesel engines and general mechanical jobs for drivers in the surrounding suburbs.

    Based in Maddington WAServes Thornlie

    Closed · opens tomorrow 7:00 am

    Get a quote

No diesel mechanics on this page match all of these filters. Untick one, or clear the filters to see all 12 on this page.

Showing 1–12 of 12 diesel mechanics · filters apply to this page only

Diesel Mechanics in nearby suburbs

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Not sure which diesel mechanic to call?

Tell us about the job and we'll match it with up to 3 diesel mechanics in Thornlie. Your contact details go only to businesses on a paid plan here, and after you send we tell you which businesses got them. Free, no obligation.

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Choosing diesel mechanics in Thornlie

Diesel mechanics for diesel servicing and repairs, injectors and fuel systems, DPF cleaning and truck repairs. Mechanics Directory lists 12 diesel mechanics in Thornlie WA. Listings show the services each business offers, and a rating where there is one.

What to check before you book

Getting started

  1. Describe the job. Your vehicle's make, model and year, what's wrong or what it needs, and when you need it done.
  2. Shortlist two or three. Use the filters above to narrow this page by website.
  3. Compare quotes. Or send one request and we'll match it with up to 3 diesel mechanics.
  4. Agree in writing. Confirm the price, what's included and when the vehicle will be ready before work begins.

Frequently asked questions

How do I choose between diesel mechanics in Thornlie?

Compare two or three. Ask whether they work on your make, and on light vehicles, trucks or machinery, whether they can come to you, and for a written quote for parts and labour. A business that is owner verified on Mechanics Directory has confirmed it runs the listing.

How much does a diesel service cost in Thornlie?

It depends on the vehicle or machine, the oil and filters it takes, and whether the injectors, turbo or DPF need work. Asking two or three local diesel mechanics for a written quote is the quickest way to see the going rate in Thornlie.

Do diesel mechanics need to be licensed?

Licensing depends on the work and the state. Modifications such as GVM upgrades need certifying under your state's rules, and outside Western Australia and the Northern Territory, modifications to heavy vehicles over 4.5 tonnes are regulated by the National Heavy Vehicle Regulator. In Western Australia, a vehicle repair business needs a repair business licence, and the work must be done or supervised by someone with a repairer's certificate for that class of work. There is an online licence search. Listings marked "Credentials listed" show a licence, accreditation or membership on the business's profile. We don't check it, so confirm it with whoever issued it.

What is DPF cleaning?

A diesel particulate filter (DPF) traps soot from the exhaust and burns it off on longer runs at highway speed. Lots of short trips can stop that happening, so the filter blocks and a warning light comes on. A diesel mechanic can check the filter and clean it or run a forced regeneration.

What does "serves this area" mean?

Some businesses are based in a nearby suburb but cover this area, including mobile mechanics and towing services that come to you. On suburb pages we list businesses based in the suburb first, then the ones that say they serve it.

How do free quotes work?

Tell us about the job once. We match your request with up to 3 diesel mechanics near you. A business on a paid plan here gets it with your name and contact details and can contact you directly. A business on the free plan sees the job and your suburb but not your details, so it can't contact you unless it upgrades. A business that hasn't claimed its listing sees your request only once it claims. After you send, we tell you which applies to each business. It's free and there's no obligation.