EPC Parts Catalog: What It Is and How to Quote
the exact number with AI
The EPC (Electronic Parts Catalogue) is where the truth about each vehicle lives: exactly which part number this VIN carries, with its diagrams and supersessions. But the EPC only gives you the number; quoting it (do I have it? at what price? which equivalent do I carry?) is a different job. Here is how an EPC works, and how AI closes the full loop from VIN to quote.
What an EPC parts catalog is
It is the electronic parts catalog: the system where you look up, vehicle by vehicle, the correct part number with its exploded diagrams, applications and supersessions (when one number replaces another). You search by VIN or by the combination of model, year, engine and trim, and the answer is the exact number that vehicle carries from the factory.
- Brand EPC: every automaker has its own, and platforms like Microcat run them for several brands. It is what people search for as "Toyota EPC catalog" or "Chevrolet EPC catalog": the official breakdown for that brand.
- TecDoc: the aftermarket standard of European origin. It cross-references the vehicle against auto parts manufacturers' numbers, not just the original number.
- Epicor: the aftermarket catalog most used at the North American counter, indexed by application (year/make/model/engine).
Want to see how Victoria would quote this from your catalog? Send us a real quote request from your counter on WhatsApp and we answer it with your prices and stock.
Send a quote request on WhatsApp →How the part number is found by VIN
The VIN (17 characters) encodes plant, year, engine and trim. The EPC decodes it and filters the breakdown down to WHAT THAT VEHICLE carries: on a model with two engines and three brake variants, the VIN removes the ambiguity a "model and year" search leaves open. That is why the professional quoting flow starts at the VIN whenever the part changes by trim.
The gap between the EPC and the quote
The EPC answers "which number is it". It does not answer what the customer asked: how much it costs and whether you have it. Between the number and the quote there are three steps that today are done by hand:
- Cross-reference the original number against your inventory: you almost never sell the automaker's number; you sell your documented aftermarket equivalent.
- Check stock and price in your system, on that customer's price list.
- Put the answer together and send it before the shop across the street does.
💡 That is where AI comes in: it takes the VIN or the number over WhatsApp, walks the whole chain (application → number → your equivalent SKU → your price and stock) and answers the quote in seconds. The EPC brings the precision; the AI quoting tool brings the speed and the close.
EPC + AI in practice
| Step | EPC alone | EPC + AI quoting tool |
|---|---|---|
| Decode the VIN | Manual, in the system | Automatic, straight from the customer's WhatsApp |
| Exact number | Yes, with diagrams | Yes, through the documented application |
| Cross-reference to your inventory | By hand, in another system | Automatic against your catalog |
| Price and stock | By hand, in another system | In the same answer |
| Answer to the customer | Written by the counter | Goes out on its own, line by line |
The technical connection between electronic catalogs and the quoting flow has its own guide: electronic parts catalog integration. And if your operation runs on numbers more than on VINs, the cross-reference is the other half of the trade.
The EPC brand by brand
How the catalog and the part number work at each brand: Toyota · Nissan · Chevrolet · Volkswagen · Ford · Honda · Hyundai · Kia · Mazda · Renault · Peugeot · Mercedes-Benz.
Frequently asked questions
What does EPC mean in auto parts?
Electronic Parts Catalogue: the electronic parts catalog where you look up the exact number a vehicle carries, with exploded diagrams, applications and supersessions. Every automaker has its own, and the aftermarket has its own too (TecDoc, Epicor).
What is Microcat?
An EPC catalog platform that runs the official parts breakdowns for several automakers: it is the system many dealers and parts stores use to look up the original number by VIN, brand by brand.
Is TecDoc useful outside Europe?
Yes, as an aftermarket cross-reference source (especially on European lines), but the number you can actually quote is the one YOUR catalog documents with a price and stock. The most common standard at the North American counter is Epicor.
Can I quote by VIN without having an EPC?
Yes, if your catalog has the applications documented (through ACES, for example): the AI decodes the VIN and cross-references against those applications. The brand EPC adds the official breakdown; either way the quote comes out of your own data.
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