Before searching in TecDoc, you need to locate the code. There are three primary ways to find a Motornummer:

Unlike the Vehicle Identification Number (VIN), which identifies the specific chassis, the engine number tells you exactly what is "under the hood." This is critical because manufacturers often use different engines within the same model year or transition between engine generations mid-production. Why the Engine Number is Critical for Parts Identification

Understanding the TecDoc Engine Number: A Comprehensive Guide

: In many regions, the engine code is listed in the vehicle registration papers (e.g., the Fahrzeugschein in Germany).

In the automotive industry, relying solely on the vehicle model (e.g., "VW Golf VII") is often insufficient. Here is why the TecDoc Motornummer is the gold standard for accuracy:

: When looking at a specific part (like a spark plug or oil filter), check the "Criteria" section. It will often specify if the part is only for certain engine number ranges. The Technical Backbone: TecAlliance Standards

: The TecDoc database links engine numbers to "Generic Articles," allowing you to find equivalent parts from hundreds of different brands that are guaranteed to fit that specific engine code. How to Find Your Engine Number

The engine number is a unique alphanumeric code assigned by vehicle manufacturers to identify a specific engine's design, technical specifications, and production series. Within the —the world's leading vehicle and spare parts database—this "Motornummer" serves as a primary search criterion.

: Many vehicles share the same body style but have vastly different internal components. The engine number distinguishes between variations in horsepower, emissions standards (Euro 5 vs. Euro 6), and fuel systems.

: Manufacturers frequently change part designs (like water pumps or timing belts) at a specific engine serial number. TecDoc allows users to see these "up to engine number" or "from engine number" constraints.