Is that second-hand e-bike road legal? The motor, battery and paperwork checks

The listing says $900. The photos show a chunky e-bike with fat tyres and a big battery, and the description says it “goes like stink”. It sounds like a great buy for getting to work, and that price is a fair bit under what a new one costs.

That price is also your first warning. A cheap, powerful e-bike might be a good deal. It might also be a bike that breaks the rules in your state, and in NSW police can now take an illegal e-bike off the road and dispose of it. If that happens, the person who loses the bike is whoever owns it at the time. After the sale, that’s you.

So before you hand over any money, it’s worth knowing how to tell a legal bike from one that isn’t, and how to judge a battery you can’t see inside. I’ll use NSW as the worked example, because its rules have just changed. If you live somewhere else, check your own state’s rules, because they’re set state by state.

What makes an e-bike legal in NSW

Transport for NSW sets out a few limits. An e-bike’s motor can have a maximum continuous rated power of 500 watts. From 1 March 2029, that drops to 250 watts. The motor’s help has to cut out once you reach 25 km/h. If the bike has a throttle, so it can move without you pedalling, that throttle-only help must cut out at 6 km/h, which is about walking pace.

There’s an important detail here. Transport for NSW says that an e-bike which goes over any of those limits is illegal, even if it has been restricted by software. That means a bike with an app setting, a switch or a code that keeps it under the limit is still illegal if the bike itself is capable of more. A seller saying “it’s legal in road mode” isn’t the reassurance it sounds like.

NSW also has a second, older category. The NSW Government describes a power-assisted pedal cycle as having a motor of up to 200 watts, along with a weight limit of under 50 kg. Most modern e-bikes fall under the newer category, the electrically power-assisted cycle, which is where the 500 watt limit and the cut-off speeds apply.

From 1 March 2029, only e-bikes certified to the European standard EN 15194 will be allowed on NSW roads. If you’re buying a bike now that you want to keep riding for years, that date matters.

Why it matters more now

These limits aren’t new, but the consequences are. Since 21 August 2026, NSW Police and authorised officers have been able to seize illegal e-bikes used on roads and road-related areas, and dispose of them.

Think about what that means for a second-hand buyer. If you pay for a bike that’s over the limits and then ride it on the road, the bike can be taken. There’s no seller to complain to at that point, because a private sale doesn’t come with that kind of protection. The risk moves with the bike, from the old owner to the new one.

So the checks below are worth the bother. You want to be sure the bike you’re paying for is one you can ride on the road.

Checking the motor and the speed

Start with the paperwork the bike came with. Ask the seller for the original listing, the receipt or the product page that shows the motor’s rated power. A genuine owner usually has at least one of those, even if it’s just an old email.

Next, look for the EN 15194 mark. Transport for NSW suggests asking whether an e-bike meets EN 15194, and a bike certified to that standard carries the EPAC mark, short for electrically power-assisted cycle. If you can’t find it, ask the seller to show you where it is.

Then ask some plain questions. You don’t need to be technical, and you’re not trying to catch anyone out. Just ask:

Does the throttle keep pulling once you’re past walking pace?
Is there an app, display or setting with an “off-road” or unrestricted mode?
Has the display, controller or motor been changed or modified?

A yes to any of those is a reason to slow down. A bike that only stays legal because of a setting is still illegal under NSW rules.

Finally, ride it. Take it somewhere flat and safe, pedal up to speed, and notice where the help stops. On a legal bike, you’ll feel the motor ease off around 25 km/h and you’ll be pedalling on your own after that. If you’re still being pushed along well past that, you’ve learnt what you need to know.

The battery you cannot see inside

The battery is the part that worries me most on a used e-bike, and it’s the part you can see the least of. A battery can look fine from the outside and still be tired, damaged or unsafe. Replacing one can cost close to what you’d pay for a cheap bike, so it’s worth taking your time here.

A rider on a step-through e-bike seen from behind on a shared path lined with Norfolk pines along Newcastle harbour

Here’s what to ask and look at:

Age. Ask how old the battery is and whether it’s the original. A newer replacement is often a good sign, as long as there’s a receipt.
Charge cycles. Some displays show how many times the battery has been charged. If this one does, have a look.
The charger. Ask for the original charger, the one that came with the bike. A mismatched or cheap replacement charger is a fire-safety concern, and a seller who can’t find the original one is telling you something.
The casing. Take the battery out if it’s removable and look closely. You’re checking for swelling or bulging, cracks, rattles when you gently tip it, scorch marks or signs of heat, and any warping around the edges.
Water. Ask whether the bike has been stored outside, ridden through floods or left in the rain. Look for corrosion on the contacts.

Then give it a proper ride, longer than a quick spin around the block. Watch the charge level on the display as you go. If it drops quickly on a short ride, the battery is probably on its way out, and you can factor that into the price or walk away.

If anything about the battery feels off, swelling especially, don’t buy it and don’t take it home. A damaged lithium-ion battery isn’t something to gamble on.

Certified and marked: what NSW now requires of sellers in business

NSW has also tightened the rules on what can be sold. The NSW Government says that from 1 February 2026, e-bikes, e-bike batteries and other e-micromobility products sold in NSW must be certified and display a safety approval mark. NSW Fair Trading keeps a list of certified products you can search.

Those rules are aimed at businesses selling these products. It’s not clear that they bind someone selling their own bike once, privately, so I won’t tell you they do. But the list and the mark are still useful to you as a buyer. Check the bike and its battery against the certified list, and look for the safety approval mark. If both are there, that’s a good sign. If neither is, ask more questions.

Paperwork and proof it is theirs

The last set of checks is about making sure the bike belongs to the person selling it. E-bikes are expensive and easy to move, and a cheap, quick sale is exactly how a stolen one changes hands.

Ask for:

The receipt, ideally in the seller’s name.
The frame serial number. Ask the seller to show you where it is on the frame, then check that it matches the receipt and that it hasn’t been scratched or filed off.
The seller’s name and address. A genuine seller won’t mind.

Try to meet at the seller’s home, not in a car park. Someone selling their own bike from their own garage is a lot easier to trust, and to find again, than someone who’ll only meet behind a shopping centre.

It also helps to know what you’re entitled to after the sale. The ACCC says most consumer guarantees don’t apply to a one-off sale by a private seller, but the seller still has to have the right to sell the bike to you. Our guide to the private-sale fine print explains what that means and why the receipt matters so much.

When it comes time to pay, be careful with the money too. Don’t pay a deposit for a bike you haven’t seen, and if you pay by transfer, check that the name on the account matches the person in front of you. Our rundown of marketplace scams in Australia covers the payment tricks to watch for.

If this sounds familiar, it’s because it’s the same habit that works for most second-hand buys. Matching a serial number to a receipt and a name is exactly what we suggest when buying a second-hand phone, just with a bigger item.

Ride it, read it, then pay for it

A second-hand e-bike can be a lovely way to get around without paying full price. Most people selling one are just upgrading or moving, and their bikes are fine.

The checks help you find those bikes and steer clear of the rest. In NSW, the motor needs to be 500 watts or less, with help cutting out at 25 km/h, and a throttle that stops at 6 km/h. A bike that only meets those limits because of a software setting is still illegal, and since 21 August 2026 it can be seized. Look for the EN 15194 EPAC mark, ask the plain questions, and ride the bike to feel where the help stops.

Take your time over the battery, and ask for the original charger. Then match the serial number to a receipt with the seller’s name on it. Ride it, read it, and only then pay for it.

Sources: Transport for NSW, E-bikes (https://www.transport.nsw.gov.au/roadsafety/bicycle-riders/ebikes); NSW Government, Choosing a legal e-bike (https://www.nsw.gov.au/driving-boating-and-transport/roads-safety-and-rules/bicycle-safety-and-rules/road-rules-for-bicycle-riders/choosing-a-legal-e-bike); NSW Government, Selling or renting out e-bikes and other e-micromobility products in NSW, 2026 (https://www.nsw.gov.au/housing-and-construction/safety-home/electrical-safety/lithium-ion-battery-safety/new-standards-for-lithium-ion-batteries-e-micromobility-devices)