How to Build a Spare Parts Catalog
A dealer calls: "The pump on a machine we bought three years ago has failed. Which part should we order?" In many companies, answering that question means an experienced employee digging through old PDF catalogs, spreadsheets, and technical drawings. When the wrong part is shipped, returns, extra freight, and lost time follow. A well-built spare parts catalog reverses this: the customer or dealer selects their machine, opens the relevant assembly, finds the part on a drawing, and orders it with the correct part number.
What a Good Spare Parts Catalog Delivers
- Fast, accurate identification of the right part
- Fewer wrong orders, returns, and unnecessary shipping costs
- Less pressure on sales and technical support teams
- Dealers and customers able to order on their own, at any time
- Higher aftermarket revenue and stronger customer loyalty
1. Define a Part Numbering Standard
Everything starts with a consistent part numbering structure. Each part needs a unique internal code, linked to the manufacturer (OEM) number, supplier codes, and any equivalent numbers. The same part appearing under different names or codes in different places is one of the most common problems in catalog projects. Cleaning existing codes and merging duplicates before you begin makes every later step easier.
2. Build the Product and Assembly Structure
Users usually search for parts starting from their machine, so the catalog should follow a product tree: product group, model, assemblies and sub-assemblies, and finally parts. This structure can often be derived from the bill of materials used in production, but an aftermarket catalog has different needs: not every component in a production BOM is sold separately, and some parts are only sold as kits.
3. Link Fitment to Models and Serial Numbers
The most important information in a spare parts catalog is which part fits which product. The same model may have been built with different parts in different years or production batches, so define fitment not only by model but, where possible, by serial number ranges, production years, or variants. Letting users enter a serial number and see only the parts that fit their machine prevents a large share of wrong orders.
In the automotive aftermarket, standard data formats such as TecDoc, widely used in Europe, are an important reference for vehicle fitment. For companies selling into those channels, building the catalog to be compatible with such formats makes distribution much easier.
4. Add Exploded Diagrams
For users who do not know a part's name, the fastest route is an exploded diagram of the assembly. Link the position numbers on each drawing to catalog parts, so that clicking a part on the diagram shows its part number, price, and availability. Existing technical drawings and CAD data are the foundation for this work.
5. Manage Revisions and Supersessions
Parts change over time: they are revised, replaced by other parts, or discontinued. The catalog should redirect users who search for an old part number to the current one and state clearly whether the two are interchangeable. When this information is lost, customers try to order parts that no longer exist, or incompatible parts are shipped.
6. Add Technical Data, Images, and Languages
Include essential details such as dimensions, material, weight, and photos for each part. For exporters, offering the catalog in the languages of target markets matters, and keeping part descriptions in a translatable structure from the start makes adding languages much easier.
7. Connect Prices, Stock, and Orders to Your ERP
A catalog is only truly useful when its prices and availability are current. Connect it to your ERP to show stock levels, lead times, and customer-specific or dealer-specific prices automatically, and send orders straight into the ERP to remove manual order entry and the errors that come with it.
8. Open Access to Dealers and Customers
A catalog used only internally delivers a fraction of its value. A portal for dealers and customers, with part search, selection from diagrams, a basket, order history, and order tracking, significantly reduces the load on sales and support. User-based permissions and pricing ensure each dealer sees only their own terms.
Data Migration: The Most Demanding Step
In most companies, catalog data is scattered across PDFs, spreadsheets, the ERP, and technical drawings. Cleaning, merging, and structuring this data is usually the most demanding part of the project. Starting with the best-selling products and parts and expanding the catalog in phases delivers results quickly while protecting data quality.
Frequently Asked Questions
What is an electronic parts catalog?
It is a digital catalog that organizes parts by product and assembly structure and presents them with fitment information, exploded diagrams, prices, and availability. It is usually available online to dealers and customers and allows them to place orders.
What data is needed for a spare parts catalog?
Unique part numbers, OEM and equivalent numbers, product and assembly structure, model and serial number fitment, technical drawings, descriptions and images, revision and supersession information, and price and stock data from the ERP.
How do we move from PDF catalogs to a digital catalog?
Clean up part codes and merge duplicates, build the product and assembly structure, and link drawings to parts. Starting with the best-selling products and expanding in phases is the most efficient approach.
Why does serial number fitment matter?
The same model may have been built with different parts at different times. Filtering by serial number shows users only the parts that fit their machine and prevents many wrong orders.
Should a parts catalog be integrated with the ERP?
Yes. ERP integration shows current stock, lead times, and customer-specific prices in the catalog, and sends orders directly to the ERP. Without integration, catalog data quickly becomes outdated.
Off-the-shelf catalog software or a custom solution?
Off-the-shelf tools can work for companies with a standard product structure. When complex serial number fitment, dealer-specific pricing, deep ERP integration, or industry-specific data formats are required, a custom solution usually delivers better results.
Conclusion
A useful spare parts catalog is built on consistent part numbers, a clear product and assembly structure, model and serial number fitment, exploded diagrams, supersession tracking, and prices and stock connected to the ERP. When it is opened to dealers and customers, the right part is found quickly, wrong orders fall, and aftermarket revenue grows. We build electronic spare parts catalogs and dealer portals for automotive, machinery, and manufacturing companies, integrated with the ERP systems they already run.