Buying used parts online: what to settle before you order

The price advantage is greatest and the risk smallest for parts that do not wear and whose condition you can see: doors, bonnets, bumpers and wings in the car's colour, interior trim, seats, mirrors, lamps, trim pieces. On an older car, add assemblies whose new price exceeds the value of the car.

And then there are the parts nobody supplies new any more. For older cars the used part is not the cheap option but the only one — and finding it is a discipline of its own.

For wear parts a used one is almost never worth it: brake pads, discs, filters, belts, shock absorbers and clutches have already run part of their life, and nobody knows how much. The price gap to a new part is small, and the labour to fit it is the same.

Care is also needed with anything that carries safety and whose history you cannot see — steering parts, load-bearing suspension parts from a donor car with accident damage. Pyrotechnic components such as airbags and belt tensioners are subject to special rules on sale and fitting in many countries; which ones, the relevant authority or a specialist workshop can tell you. And tyres of unknown age are a subject of their own.

Most used parts come from commercial dismantlers who break cars, catalogue the parts and sell them individually. Many specialise in particular makes or vehicle types and know accordingly well what they have in stock. Add workshops selling on parts from repairs, and private individuals who have broken or modified a car themselves.

For rare or older cars, owners' clubs and forums are often the best source, because that is where people who know the part and its variants gather. On Carvexia the condition is stated on every listing — new, remanufactured or used — and the seller behind it is your contracting party.

A serious seller of used parts knows which car a part came from, and says so. Ask for the donor's model, engine with engine code, year and mileage — and the reason it was dismantled. A frontal impact makes parts from the engine bay suspect; a rear impact hardly does.

The donor's chassis number is the single best piece of information, because it lets you match version and equipment. Not everyone will give it out. A seller who cannot name it should at least be able to photograph the OE number on the part itself.

Catalogue images show what a part ought to look like. You need photos of the piece you will receive: from all sides, with the label or stamped number, with the connectors, the mounting points and the places where damage is common. Ask specifically for the view you are missing — a seller with the part in front of them can do it in a minute.

For body parts that means the paint code, not the colour name. Two silvers from the same manufacturer can look so different side by side that repainting cannot be avoided — and then the price advantage of the part in the car's colour is gone.

Control units, instrument clusters, keys and anything that talks to the immobiliser are, on many cars, coded to the car they came from. Fitted to another car they either do nothing or the wrong thing until they have been adapted — and depending on the manufacturer that adaptation needs tools, access to its systems or both.

So before you buy, ask your workshop whether it can code the part and what that costs. Sometimes a used control unit plus adaptation is cheaper than a new one, sometimes the reverse, and sometimes it cannot be done at all. The answer belongs before the order.

How a part is described — checked, tested, removed in working order — is a statement by the seller and worth as much as their willingness to stand by it. Commercial dismantlers often give their own warranty on used parts; with private sellers the statutory warranty is excluded in many countries. Exactly what applies depends on the law of the seller's country and on their terms.

Before buying, get two things in writing: whether you can return the part if it does not fit, and what happens if it does not work once fitted. The second question matters more, because by then labour has already been paid for.

If the gap between new and used feels too large, the remanufactured exchange unit is often the better answer: rebuilt, with a warranty and in return for the old part.

Engines, gearboxes, doors and bumpers do not travel as parcels. For large parts, ask in advance about the shipping method, the packaging and whether fluids have been drained. A gearbox lying in a crate without oil but with open ports arrives differently from one with its openings sealed.

Delivery straight to the workshop fitting the part is practical. Agree it with them first and put their name in the address so the part is matched correctly on arrival. And open the consignment as soon as it arrives: transport damage can only be claimed while it is fresh.

Pay in a way that remains traceable, and keep the order confirmation, the item description and the photos. A bank transfer to a private individual you have never met is the same trap for a part as for a car — only with smaller sums, which is why it is underestimated more often.

On Carvexia a parts order goes to the seller first; payment follows by card through Stripe Checkout. Stock is booked when payment arrives, not at the moment of ordering. The contracting party for the invoice, warranty and returns is the seller who ships the part — their name is on the listing and in every message about the order.