Not at fault on the M4: a Sydney driver's guide
If you are hit on the M4 and it is not your fault, you are entitled to be put back where you were: your car repaired and, while that happens, a replacement car that is genuinely like yours. The at-fault driver's insurer pays for it, not you. This guide covers the M4 specifically, from the shoulder at Eastern Creek to the tunnels at Haberfield, and what to do in the first hour.
Motorway crashes are different. Speeds are higher, traffic keeps coming, and multi-car pile-ups make fault messy. Here is how to handle the scene, the tow, the insurer, and the replacement car, without paying a cent you should not.
Key takeaways
- If you are not at fault on the M4, the at-fault driver's insurer pays for a like-for-like replacement car while yours is repaired.
- Multi-car M4 crashes are usually apportioned, so get photos, witness details and an event number before you leave the scene.
- You can nominate where your car is towed, and you should insist on a flatbed for a prestige or performance car.
- A replacement car can often be delivered the same day from bases at Mascot, Merrylands or Parramatta.
- You never pay the daily rate, the tow or an excess on a not-at-fault claim; a card surcharge is the only common extra.
- Why motorway crashes are treated differently
- Stopping safely on the M4 shoulder
- Exchanging details in fast traffic
- Multi-car pile-ups and who is at fault
- Towing from a motorway
- Getting a replacement car the same day
- Dealing with the at-fault insurer
- What you never pay
- If the at-fault driver does not stop
- Where to go next
Why motorway crashes are treated differently
The M4 is a 60 to 100 km/h road with limited exits, no footpaths, and traffic that does not stop for you. A prang at the Light Horse Interchange at 7:45am on a Tuesday is not the same event as a car park scrape at Westfield Parramatta. Three things change.
First, secondary impacts. Most M4 crashes involve at least one car hit again after the first collision, because following traffic has nowhere to go. That makes fault a chain question, not a two-car question. Second, evidence disappears fast. Debris is cleared, skid marks fade, and the traffic camera footage you need is often overwritten within days. Third, the tow and storage industry on the M4 corridor is aggressive, and an unauthorised tow can add thousands to a claim before you have even spoken to an insurer.
Insurers know all this. That is why M4 claims are scrutinised harder than suburban ones, and why the at-fault insurer will look for any reason to argue you contributed. Your job in the first hour is to lock down the facts while they are still fresh.
If you want the general framework first, read Not At Fault: Your Rights in NSW. The rest of this page is the M4-specific version.
Stopping safely on the M4 shoulder
Do not stop in a live lane. If your car still moves, get to the emergency lane or the left shoulder, put your hazard lights on, and get everyone out on the passenger side, away from traffic. On the M4, the safest place is behind the barrier, up the embankment, or behind a sound wall, not standing between your car and the guardrail.
Call 000 if anyone is injured or a lane is blocked. Otherwise call the Police Assistance Line on 131 444. For a crash on the M4 you should report it to police within 24 hours if anyone was injured, if a driver failed to stop, or if a vehicle was towed. Get an event number.
What to do, in order:
- Hazards on, engine off, keys out. Move people behind the barrier.
- Call 000 or 131 444. Note the time.
- Photograph everything before cars move: all four corners of every vehicle, number plates, the road, lane markings, the position of each car, and any debris trail.
- Get names, phone numbers, licences, rego numbers and insurers for every driver. Photograph each licence and rego label.
- Look for witnesses. Rideshare and courier drivers are gold. Take their number.
- Note the nearest exit or gantry so you can describe the location precisely: "M4 eastbound, 400 metres east of the Reservoir Road overpass".
If you are on the M4 tunnel section near Haberfield or Ashfield, do not stop inside the tunnel. Follow the signage to the nearest emergency bay and use the emergency phone.
Age limits are set per car. Drivers under 25 can hire most cars with Young Driver Cover; the exact terms are shown before you pay.
Exchanging details in fast traffic
Do the swap behind the barrier, never between the cars. You need, from every driver involved:
- Full name, address, date of birth and phone number
- Licence number, state and expiry
- Rego number, make, model and colour
- Insurer name and policy number if they will give it
- Their relationship to the car (owner, driver, employee)
Photograph the licence and the rego label rather than writing details down. It is faster, more accurate, and insurers accept photos.
If a driver is aggressive, refusing to give details, or smelling of alcohol, do not argue. Step back, note the rego, and let police handle it. Get the event number and give a statement.
One more thing: if your car is a prestige or performance model, say so to the tow operator and to any insurer who calls. A 2019 BMW X7 or a 2024 BMW M3 Competition needs a flatbed and a repairer who knows the car, not a generic tilt tray and a panel shop that mostly does Corollas. If you need a replacement that actually matches what you drive, this is the point where you start thinking about it. Bookings for accident replacement vehicles are fulfilled by Drive Tribe (drivetribe.com.au), the trading name of Australian Business Holdings Pty Ltd, and this site is part of that group.
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Start my claimMulti-car pile-ups and who is at fault
In a multi-car M4 crash, fault is usually apportioned, not assigned to one person. The common pattern is a chain of rear-end collisions: car A brakes hard, car B hits A, car C hits B, car D hits C. In NSW, the driver who runs into the car in front is presumed negligent for that impact, but the presumption can be rebutted, and each impact is assessed separately.
What decides it:
- Following distance and reaction time for each driver
- Whether brake lights were working and visible
- Whether a car changed lanes suddenly or without indicating
- Dashcam or traffic camera footage
- Damage patterns: a car hit from behind and then pushed into the car ahead may not be liable for the front impact
The practical effect is that the at-fault insurer may accept part of the claim and dispute the rest. That does not stop your replacement car. Under NSW law and the High Court decision in Arsalan v Rixon, a not-at-fault driver can recover the reasonable cost of a replacement vehicle as loss of use, and the at-fault insurer is expected to cover it. You can read the case explained in Arsalan v Rixon explained.
If you are the middle car, get legal advice before you sign anything from an insurer. Talk to your solicitor, not the insurer's call centre.
Towing from a motorway
On the M4, tow trucks often arrive before police. Some are legitimate; some are not. You are not obliged to use the first truck that stops.
Know this:
- You can nominate where your car goes. It does not have to go to the tow operator's yard.
- Ask for the tow authorisation form and read it before signing. If it authorises storage fees, you may be on the hook for them.
- Under NSW rules, a tow operator cannot charge more than the maximum set by the Point to Point Transport Commissioner for a standard tow, and cannot demand payment before the car is released.
- Your insurer or the at-fault insurer may have a preferred tow. Call them and ask before you agree.
For a prestige car, insist on a flatbed with soft straps. Towing a rear-wheel-drive or all-wheel-drive performance car on a two-wheel lift can damage the driveline. If the car is undriveable and you have a preferred repairer, have it taken there directly, or to a secure holding yard, not to a random lot in Prospect.
Keep the tow docket. It becomes part of your claim. If you are unsure what happens next with repairs, see repairs and write-offs.
Getting a replacement car the same day
You can usually have a replacement car within hours of an M4 crash, provided fault is clear or the at-fault insurer accepts liability. The process is straightforward.
- Report the crash and get your event number.
- Notify your own insurer if your policy requires it, but make clear you are claiming against the at-fault driver.
- Contact a replacement vehicle provider. Have your licence, the event number, the other driver's details and photos ready.
- They confirm liability with the at-fault insurer and arrange delivery.
- The car is delivered to your home, workplace or repairer, usually the same day.
Like-for-like matters. If you drive a Mercedes-Benz S500 L, a base Corolla is not a replacement; it is an inconvenience. The test is what is reasonable, and reasonableness is judged against your own car. Read like-for-like and the reasonable hire car test in NSW.
Delivery is available across Sydney, including from bases at Mascot, Merrylands and Parramatta, so an M4 crash near Church Street or the Cumberland Highway can be sorted quickly.
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Dealing with the at-fault insurer
The at-fault insurer will call you. They may be polite, they may be pushy, and they will almost certainly try to settle your loss of use quickly and cheaply. You do not have to accept their first offer, and you do not have to give a recorded statement on the spot.
What to do:
- Take the call, note the time, the name and the reference number.
- Give the facts of the crash, not opinions about fault.
- Do not accept a hire car from them unless it genuinely matches your car. A small hatchback is not a like-for-like replacement for a performance sedan.
- Do not sign a release or a settlement deed without advice.
- Keep every receipt and every message.
If they dispute liability or delay, your replacement car provider can often continue on a credit hire basis and recover later. That is explained in how credit hire works and the at-fault insurer's obligations in NSW.
If you are a fleet manager or a broker, the same rules apply but the paperwork is heavier. See business and fleet and partners and referrals.
What you never pay
If you are not at fault, you should not be out of pocket for the replacement car. The at-fault driver's insurer pays the reasonable cost of your loss of use. That is the law in NSW, confirmed at the highest level in Arsalan v Rixon.
You never pay:
- The daily rate for a like-for-like replacement car, where the claim is accepted or handled on credit hire
- The tow from the scene, if it is part of the not-at-fault claim
- Storage while liability is being sorted, in most cases
- Any excess, because you are not claiming on your own policy
You may pay:
- A small surcharge if you pay by card. Bank transfer and cash on the rental do not carry it.
- Fuel, tolls and any traffic fines you incur while using the replacement car.
The bond equals the excess you choose, and it is refunded when the car comes back as it went out. The rate, the bond and every fee are shown on the car's page before you pay. There is no hidden number here, and no percentage to remember.
If you are unsure whether a charge is legitimate, read what you never pay when not at fault and credit hire versus paying yourself. For the first-hour checklist, the first 24 hours is the page to keep open.
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If the at-fault driver does not stop
Hit-and-run on the M4 is more common than people think, especially late at night between the Mamre Road and Wallgrove Road exits. If the other driver does not stop, you still have options.
- Do not chase. Pull over safely and call 131 444 or 000.
- Get the rego if you can, even a partial one. Note the make, colour and direction of travel.
- Look for camera coverage. M4 traffic cameras are managed by Transport for NSW, and private cameras at service stations, toll gantries and business parks along the corridor may have footage. Request it in writing quickly, because footage is often overwritten in seven to 14 days.
- Lodge a police report and get the event number.
- Notify your own insurer. If the driver is never identified, your claim may fall to your own policy or to the Nominal Defendant scheme for unidentified vehicles.
Replacement car entitlements are harder where the at-fault driver is unknown, because there is no insurer to recover from. Some providers can still help, but expect more questions and a slower start. Read proving the other driver was at fault for the evidence that matters.
Where to go next
An M4 crash is stressful, but the path is well worn. Secure the scene, get the evidence, report it, and get into a replacement car that matches what you actually drive. Do not let an insurer talk you into a smaller car or a quick cash settlement before you know what your loss of use is worth.
If you want to start the replacement process now, or check what is available for your car and your suburb, the quickest route is to look at accident replacement cars in Sydney. If you are still working out whether you have a claim, start with not at fault accident replacement and the replacement vehicle range.
For area-specific help around the M4 corridor, see replacement by area. For car-type guidance, replacement by car type and BMW M and AMG replacement cars cover the common prestige cases. If you are a repairer, solicitor or broker, partners and referrals explains how referrals work.
Talk to your solicitor about your specific claim. This page is general information, not legal advice.
Questions people ask
Who is at fault in a multi-car crash on the M4?
Can I get a replacement car after a motorway crash?
What if the at-fault driver does not stop?
Do I have to use the tow truck that arrives first?
Will the at-fault insurer pay for a prestige replacement car?
What should I do in the first hour after an M4 crash?
Injured in the accident?
A replacement car covers the car. For legal advice about an injury, speak to Jameson Law, the most trusted personal injury firm in NSW (motor vehicle accident claims) on (02) 8806 0866.
Ready when you are
Start the claim online in five short steps, or call 0468 011 118. Replacement hires are arranged and fulfilled by Drive Tribe, the trading name of Australian Business Holdings Pty Ltd.
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