Logbook servicing and new-car warranty: what independent mechanics need to know

An independent mechanic can do the logbook service on a new car without voiding the manufacturer’s warranty, provided the service meets the warranty’s own requirements. That is what the ACCC has said in writing since at least 2016. The catch is the paperwork: if a warranty claim is ever disputed, your service record is the evidence.

What the ACCC has said

The three documents below date from 2016 to 2019. They are older, so read them as the ACCC’s stated position at the time, and check the warranty booklet for the car in front of you.

In its October 2016 issues paper for the new car retailing market study (a consultation paper; the final report followed in December 2017), the ACCC said suggestions that new cars must be serviced at a dealer to keep consumer guarantee rights are false. It said a manufacturer’s warranty may set requirements, for example that servicing is done by qualified staff, according to the manufacturer’s specification, and with appropriate quality parts where required. If an independent repairer services the car in line with those requirements, the ACCC said, the warranty remains valid.

The industry guide to the Australian Consumer Law for motor vehicle sales and repairs (2018, published by the ACCC with the state and territory consumer agencies) says an independent repairer can service a vehicle without affecting the consumer guarantees, and that logbook or service manual statements saying dealers must do the servicing may be misleading. It also says the flip side: if an independent repairer causes a defect, the consumer seeks a remedy from that repairer, and the defect is unlikely to be covered by the manufacturer’s warranty.

The ACCC’s “Just bought a new car?” fact sheet (April 2019), which the dealer should hand to the buyer at the point of sale, says the consumer guarantees apply whether or not an independent operator services or repairs the car. It says a manufacturer’s warranty typically lets the owner choose their repairer as long as the manufacturer’s maintenance and servicing standards are met, and that some warranties may require the car to go back to the dealer network for repairs claimed under the warranty. That is warranty repair work, not the scheduled service.

Extended warranties are different

Extended warranties, from the manufacturer, the dealer or a third party, can carry conditions the standard warranty doesn’t. The fact sheet names one: requiring a nominated repairer. The 2016 issues paper says a dealer’s extended warranty commonly requires servicing by that dealer, that this may be permissible, and that an independent service may then void it.

A real example: in December 2020 the ACCC allowed Mitsubishi’s 10-year or 200,000 km extended warranty to stand, which is conditional on servicing only by authorised Mitsubishi dealers and service centres. The ACCC noted the standard five-year warranty still applied and did not limit owners to any particular service provider. Terms change, so check the current warranty booklet rather than relying on that release.

Doing the service so it stands up

Each condition the ACCC describes maps to something you can prove. Work from the manufacturer’s schedule for that car’s interval (km or months, whichever the book says comes first), use parts and fluids that meet the stated specification, and have a qualified person do or sign off the work.

Stamping the logbook and what to keep

Fill in the logbook page for the interval you did: date, odometer, your business name and stamp, signature and invoice number. Some logbooks label the box for an “authorised dealer”. The ACCC’s 2016 issues paper quotes its then Deputy Chair saying an independent repairer may still sign or stamp that page without affecting the warranty, provided the other requirements are met.

Some makes now use online logbooks. The same issues paper recorded complaints that only dealers could access some of them. If you can’t update the online record, your invoice and service record carry the evidence, so make them complete and give the customer a copy.

Keep, against the job, for at least as long as the warranty runs:

• The invoice with the record above, and the checklist for that interval.
• A photo of the stamped logbook page, so you have it if the book goes missing.
• Photos of the odometer, the oil bottle label and any filter boxes.
• Supplier invoices for the parts, which tie part numbers to the job.

What to say to the customer

Customers ask “will this void my warranty?” Have the answer ready, keep it short, and point them to the ACCC rather than asking them to take your word for it.

If a dealer pushes back

Pushback usually arrives as a warranty claim knocked back with “not serviced by a dealer”, or a customer told at the service desk that their warranty is void. Work through it in this order.

1. Ask the customer to get the reason in writing, naming the warranty clause relied on.
2. Check which warranty it is. A standard manufacturer’s warranty and an extended warranty with a dealer-servicing condition are different cases.
3. If it’s the standard warranty, give the customer copies of your service records for every interval you did, and the links in the Sources section below.
4. If the refusal is that your work caused the fault, look at the claim on its merits. Under the ACL guide, a defect you caused is yours to remedy, not the manufacturer’s.
5. If it isn’t resolved, the customer can contact the ACCC or their state or territory consumer agency. Consumer guarantee rights don’t depend on where the car was serviced.

Access to repair information (MVIS)

The Motor Vehicle Information Scheme (formally the Motor Vehicle Service and Repair Information Sharing Scheme) is mandatory under the Competition and Consumer Act 2010. It makes service and repair information available to all Australian repairers to buy at a price that doesn’t exceed fair market value. That includes the information needed to service and repair cars, software updates that pair a new part with the car, and codes for the car’s computerised systems.

Per the ACCC, it covers passenger and light goods vehicles made on or after 1 January 2002. It does not cover two- or three-wheelers, farm, construction or heavy vehicles, motorhomes or buses. Day-to-day running sits with the Australian Automotive Service and Repair Authority (AASRA), the appointed scheme adviser, which handles operational enquiries and can nominate a mediator when a repairer and a data provider can't agree on one. The ACCC enforces it.

Two enforcement cases show what data providers must offer. In proceedings against Subaru Australia filed in August 2026, the ACCC alleges that between 1 July 2022 and 31 August 2024 it failed to offer independent repairers the same information as its dealers, and offered access only annually when it had to offer daily or monthly access. The same release notes Honda Australia paid an $18,780 infringement notice penalty in September 2024 for offering repair software by yearly subscription only. If a data provider won’t sell you scheme information, contact AASRA.