In the TecDoc database, every vehicle is linked to specific engine codes. These codes are not just random numbers; they identify the exact technical specification of the engine (displacement, power, fuel type, cylinder count).
TecAlliance is actively integrating AI and image recognition. In the near future, the "TECDOC Motornummer" search may involve taking a smartphone photo of the engine block. The AI will read the stamped number and automatically load the parts catalog.
Furthermore, with the rise of electric vehicles (EVs), the concept of "Motornummer" is evolving to "EM-Nummer" (Electric Motor Number) . TECDOC already supports this for EVs like the VW ID. series, where the electric motor serial number determines the gearbox oil spec and bearing kit. tecdoc motornummer
To provide a detailed technical and practical guide to the handling of Motornummer within TecDoc, including:
| Make | Example full engine number | Extracted engine code | Notes |
|-------|----------------------------|------------------------|--------|
| BMW | 17658723 (older) | M20 | Not embedded; use VIN |
| BMW (new) | B58B30A12345678 | B58B30A | Clear prefix |
| VW | 03C906057C 123456 | 03C | First 3 digits after space |
| Mercedes | 27291230012345 | 272 | First 3 digits = engine family |
| Ford (EU) | JTDA123456 | JTDA | Four-letter code |
| Opel | 20XER123456 | 20XER | Displacement + code |
| PSA | DW10FD 1234567 | DW10FD | Prefix |
| Volvo | B8444S 123456 | B8444S | Space separator | In the TecDoc database, every vehicle is linked
How does TECDOC stack up against OEM systems?
| System | Strengths | Weakness | | :--- | :--- | :--- | | TECDOC | Cross-brand; shows aftermarket alternatives; Motornummer search standard. | Subscription cost; heavy interface. | | ETKA (VW/Audi) | Extremely precise for VAG group; updates weekly. | Only works for VAG; no aftermarket prices. | | EPC (Mercedes) | Deep vehicle history by VIN. | Motornummer search is secondary. | | TECDOC Motornummer | Uniquely allows search by serial number across all brands. | Requires training to use advanced filters. | How does TECDOC stack up against OEM systems
The Verdict: If you work on multiple brands (independent workshop), TECDOC using the Motornummer is the only viable solution. If you are a VW specialist, ETKA is fine, but TECDOC gives you the cross-referencing to aftermarket brands like Febi, Meyle, or Vaico.
In TECDoc's logic, the engine number is not a primary key like the VIN. Instead, it is a qualifier used to narrow down parts when the VIN alone is ambiguous.
| Manufacturer | Engine Code Pattern | Number of characters in engine number | Information encoded |
|--------------|--------------------|-----------------------------------------|----------------------|
| BMW | M54B25XXXXX | 11 | Code + displacement + serial |
| VW/Audi | 03C 123 456 A | 10-12 | Engine code (3 digits) + sequential + revision |
| Volvo | B6304T 123456 | Variable | Engine code + build plant + serial |
| Renault | F4R 832 – F4R 836 | 7-9 (engine number may omit plant code) | Engine family + variant code (last 3 digits crucial) |