Notes for owners · Industry playbooks
Genuine, OEM or aftermarket: how to explain the choice to a car owner without scaring them
How an online spares seller explains genuine, OEM and aftermarket parts in plain words, which parts deserve a firm recommendation, and how to let the buyer's own mechanic check your advice before they pay.
The GullySales team · Updated 17 Oct 2026 · 5 min read
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A car owner buying a spare online carries two fears at once. One is paying the dealer's price for a box. The other is saving money on a part that fails on the highway. Push hard on either fear and the owner leaves. Label every listing genuine, OEM or aftermarket, with the maker's name and a photograph of the actual box. Recommend genuine or OEM outright for brakes, steering and suspension, and say why in one calm sentence. Then let the owner bring their own mechanic in before paying, because that is whose word they trust.
What the three words mean, in the buyer's language
Owners say "company part", "original", "first copy" and "local", and mean different things by them. Genuine comes in the carmaker's box through its dealers. OEM, which some sellers call OES, comes from the company that supplies the carmaker, in that company's own box and at a lower price. How to define each grade on a listing, and why "OEM quality" should never appear in a title, is set out in our post on spare parts catalogues.
Aftermarket is not duplicate. An aftermarket part is made by another company to fit the car. Quality runs from brands workshops fit daily to parts nobody should fit, so the maker's name is everything. A duplicate is a counterfeit in a box printed to look genuine. It is not a grade; it is a fraud. When an owner says "local", they are often lumping the two together. Pulling them apart, without raising your voice, is most of the explaining you have to do.
Which parts get which recommendation
Pick a rule by what happens when the part fails.
If it fails at speed, recommend genuine or OEM by name. That covers brake pads and shoes, discs, steering joints, suspension arms and timing belts. Say why in one sentence, without drama.
If it fails at the kerb, aftermarket from a known maker is a fair saving, and you should say so. Filters, wiper blades, bulbs and horns sit here.
If it has to look right, warn about fit. Body panels, mirrors and lamps from aftermarket makers vary in how they line up, so show photographs of one fitted and let the buyer judge.
And if you cannot name the maker of a cheaper part, do not list it.
How a seller scares the buyer without meaning to
Fear sells one brake pad and loses the rest of the basket.
| What the page or the chat says | What the owner hears | Say this instead |
|---|---|---|
| "Local parts can cost you your life", on every page | This seller works for the dealer | One plain line on brake, steering and suspension parts only |
| "Not recommended" stamped on aftermarket listings | Then why are you selling it? | List only what you would fit yourself |
| "Your mechanic is fitting cheap parts" | You have insulted my mechanic | "If your mechanic prefers a maker, tell us and we will quote it" |
| A genuine price with no reason beside it | I am paying for the box | "The part the dealer's workshop fits, in the carmaker's box" |
| Nothing about who made a cheaper part | It must be a duplicate | The maker's name and a photograph of the box |
A part card on every listing
Put the same short block on every product page, filled in honestly. Here it is for a brake pad set.
Grade: OEM
Made by: (the supplier's name, as on the box)
Box you receive: supplier's own box, see photo 3
Fits: (model, engine, generation, front axle)
Replaces: (the carmaker's part number)
Mechanic to check: pad thickness and the wear-indicator clip
Warranty from: the maker, claimed through us
Counterfeit check: part number on the box matches the part inside;
distributor invoice on file for this batch
Also available: genuine, in the carmaker's box
The "Mechanic to check" line is the one that calms people. It tells the owner what a good mechanic will look at, so the inspection in the garage confirms your listing instead of contradicting it. If a supplier sends loose parts in plain bags, settle that before you list.
Put the mechanic beside you, not against you
The buyer will do what the mechanic says. A mechanic may favour a brand for good reasons, or for the margin, and you cannot tell which from a website. Do not argue. Make it easy for the buyer to show your listing first.
A "Send to my mechanic" button that shares the part card and the box photograph on WhatsApp does this. When a buyer asks in chat, a reply like this keeps everyone calm:
This pad is made by the company that supplies the carmaker with it, in that company's own box, and the photos show the exact box you will get. The genuine one is also in stock at a higher price. For brakes we would pick either of these two. Shall I send the part number to your mechanic before you order?
Fast sellers such as filters, brake pads, spark plugs and engine oil are the parts to trace most carefully. Before you list one, trace it to an invoice from the maker's own distributor, and keep that invoice on file. If a part cannot be traced, it does not go on the site, whatever the margin.
For example: the red banner that emptied the basket
Imagine a car spares seller in Kolhapur, selling on its own site and on WhatsApp to owners across south Maharashtra. Every page carried a red banner: "Local parts can kill. Buy only genuine." Aftermarket listings were stamped "not recommended". In chat, staff told buyers that their mechanic's favourite brand was unsafe.
Brake pads sold, at the genuine price. Little else did. Owners who wanted an honest aftermarket air filter or wiper blade decided the seller was steering everyone to the dearest box, and bought elsewhere. Two local mechanics told customers to stop ordering from the site, which had called their parts dangerous.
The banner came down. The warning moved to brake, steering and suspension listings only, as one plain sentence about what happens if that part fails. Aftermarket parts the owner would not fit on their own car were taken off rather than stamped. Every listing got the part card, and chat replies began with "Shall I send this to your mechanic?" The owner rang the two mechanics and offered trade rates, the route our post on garages as trade buyers lays out. One came round; the other did not, and brake pad sales stayed flat for a while.
Read your pages as a nervous owner would
Read your banners, brake listings and recent chat replies. Is fear doing the selling? Then it is costing you every part that is not a brake. Rewriting the banners and replies is content strategy work, and spares sellers sit in our e-commerce sales and marketing group. To rewrite the catalogue and replies with us, tell us what you need.
