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

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Diesel Mechanics in Smithfield NSW

12 diesel mechanics4 based here · 8 serve the area

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 Smithfield; listings updated 7 Oct 2026.

  1. Croydon Racing Developments

    Mechanics, 4x4, Diesel Mechanics

    6 Tarlington Pl, Smithfield NSW 2164

    Directions View profile Est. 2000

    Performance and tuning workshop in Smithfield, NSW, doing dyno tuning, engine building and race car preparation.

    • Dyno Tuning
    • Performance Mechanics
    • Engine Building

    6 Tarlington PlSmithfield NSW 2164

    Closed · opens tomorrow 8:00 am

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  2. Euro Masters Mechanical Repairs Pty Ltd

    Mechanics, Auto Electricians, Diesel Mechanics

    22 Justin St, Smithfield NSW 2164

    Directions View profile

    Mechanical repair workshop in Smithfield, NSW, handling servicing, diesel repairs, electrical diagnostics, transmission work and inspections.

    • Transmission and gearbox repairs
    • Exhaust, cooling and engine repairs
    • Vehicle and pre-purchase inspections

    22 Justin StSmithfield NSW 2164

    Closed · opens tomorrow 8:00 am

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  3. Sunrise Trailer Parts Sydney

    Caravan Repairs, Diesel Mechanics

    5 Sammut St, Smithfield NSW 2164

    Directions View profile

    Trailer parts and accessories supplier in Smithfield, NSW, also covering caravan and trailer suspension and jockey wheels.

    • Trailer parts and accessories
    • Caravan and trailer suspension
    • Jockey wheels

    5 Sammut StSmithfield NSW 2164

    Closed · opens tomorrow 8:30 am

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  4. Sydney Diesel Centre

    Mechanics, Diesel Mechanics

    126 Cumberland Hwy, Smithfield NSW 2164

    Directions View profile

    Diesel workshop in Smithfield, NSW for diesel pump and injector calibration, plus oil changes and automotive servicing.

    • Oil change
    • Diesel servicing and repairs

    126 Cumberland HwySmithfield NSW 2164

    Closed · opens tomorrow 7:30 am

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  5. Based nearby, serving Smithfield

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

  7. Apa Diesel Engines Recondition

    Diesel Mechanics

    Based in Guildford NSW · serves Smithfield

    Directions View profile Serves this area

    Diesel engine reconditioning specialist in Guildford, NSW, rebuilding engines and modifying injection pumps and injectors.

    • Engine reconditioning
    • Injection pump boost compensator modific…
    • Turbo charging diesel engines

    Based in Guildford NSWServes Smithfield

    Closed · opens tomorrow 8:00 am

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  8. Multispares Pemulwuy

    Diesel Mechanics, Mechanics, 4x4, Caravan Repairs

    Based in Pemulwuy NSW · serves Smithfield

    Directions View profile Serves this area Est. 1976

    Truck and bus parts supplier in Pemulwuy, NSW, covering drivetrain, braking, cooling and suspension components.

    • Available Truck Parts
    • Available Bus Parts
    • Drivetrain Parts

    Based in Pemulwuy NSWServes Smithfield

    Closed · opens tomorrow 7:30 am

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  9. Cornell Diesel Systems (NSW)

    Mechanics, Diesel Mechanics

    Based in Wetherill Park NSW · serves Smithfield

    Directions View profile Serves this area

    Diesel engine repairer and automotive parts supplier in Wetherill Park, NSW, serving trade and private customers.

    Based in Wetherill Park NSWServes Smithfield

    Get a quote

  10. E Auto Group

    Mechanics, Diesel Mechanics, Caravan Repairs

    Based in Wetherill Park NSW · serves Smithfield

    Directions View profile Serves this area

    Truck, trailer and construction equipment manufacturer in Wetherill Park, NSW, also offering on-site repair services.

    • On-site services
    • Caravan, RV and trailer sales and hire

    Based in Wetherill Park NSWServes Smithfield

    Closed · opens tomorrow 8:00 am

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  11. MJ Automotive & Smash Repairs

    Mechanics, Auto Electricians, 4x4, Tyres, Panel Beaters, Diesel Mechanics, Caravan Repairs

    Based in Guildford NSW · serves Smithfield

    Directions View profile Serves this area Est. 2024

    Auto repair and smash repair workshop in Guildford, NSW, handling logbook servicing, brake repairs, transmissions and inspections.

    • Smash Repairs
    • Brake Repairs
    • Logbook Servicing

    Based in Guildford NSWServes Smithfield

    Closed · opens tomorrow 9:00 am

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  12. Pacific Bodyworks

    Diesel Mechanics

    Based in Wetherill Park NSW · serves Smithfield

    Directions View profile Serves this area

    Aluminium service body builder in Wetherill Park, NSW, making custom ute and small truck bodies, tray bodies and canopies for trades.

    • CUSTOMISE YOUR SERVICE BODY
    • Custom aluminium service bodies
    • Truck bodies

    Based in Wetherill Park NSWServes Smithfield

    Closed · opens tomorrow 7:00 am

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Choosing diesel mechanics in Smithfield

Diesel mechanics for diesel servicing and repairs, injectors and fuel systems, DPF cleaning and truck repairs. Mechanics Directory lists 12 diesel mechanics in Smithfield NSW. 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 Smithfield?

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 Smithfield?

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 Smithfield.

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 New South Wales, a business that repairs vehicles needs a motor vehicle repairer licence from NSW Fair Trading, and the people doing the work generally need a tradesperson certificate (some minor work is exempt). You can check a licence on the NSW Government's online licence check. In New South Wales, autogas (LPG) work is regulated under the Gas and Electricity (Consumer Safety) Regulation 2018; ask for the autogas licence. 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.