| Factory | Number | Cross Interchange Type | Relevance |
|---|---|---|---|
| BENDIX | 503L | Direct Cross Interchange | 1 |
| ACDelco | 17503B | Indirect Cross Interchange | 1 |
| AMS | 503 | Indirect Cross Interchange | 1 |
| VW | 2516985312641 | Indirect Cross Interchange | 1 |
| VW | 251698531 | Indirect Cross Interchange | 1 |
| VW | 251609532Q2641 | Indirect Cross Interchange | 1 |
| VW | 251609532Q | Indirect Cross Interchange | 1 |
| VW | 251609532M2641 | Indirect Cross Interchange | 1 |
| VW | 251609532M | Indirect Cross Interchange | 1 |
| VW | 251609532B2641 | Indirect Cross Interchange | 1 |
| VW | 251609532B | Indirect Cross Interchange | 1 |
| VW | 251609532 | Indirect Cross Interchange | 1 |
| VW | 251609531P2641 | Indirect Cross Interchange | 1 |
| VW | 251609531P | Indirect Cross Interchange | 1 |
| VW | 251609531M2641 | Indirect Cross Interchange | 1 |
| VW | 251609531M | Indirect Cross Interchange | 1 |
| VW | 251609531E2641 | Indirect Cross Interchange | 1 |
| VW | 251609531E | Indirect Cross Interchange | 1 |
| VW | 251609531B2641 | Indirect Cross Interchange | 1 |
| VW | 251609531B | Indirect Cross Interchange | 1 |
| FMSI | 1352503amp160 | Indirect Cross Interchange | 1 |
| CENTRIC | 11005031 | Indirect Cross Interchange | 1 |
| MONROE | BX503 | Indirect Cross Interchange | 1 |
| LUCAS ELECTRICAL | BS279 | Indirect Cross Interchange | 1 |
| RAYBESTOS | 503PG | Indirect Cross Interchange | 1 |
| WAGNER | PAB503 | Indirect Cross Interchange | 1 |