| Factory | Number | Cross Interchange Type | Relevance |
|---|---|---|---|
| METZGER | CR521 | Direct Cross Interchange | 5 |
| OJD (QUICK BRAKE) | 0521 | Direct Cross Interchange | 4 |
| DELPHI | LY1008 | Direct Cross Interchange | 4 |
| PEX | 521 | Direct Cross Interchange | 4 |
| ATE | 03013792292 | Direct Cross Interchange | 3 |
| VW | 608052100 | Direct Cross Interchange | 2 |
| HAVAM | HP3521 | Direct Cross Interchange | 1 |
| ATE | 669229 | Direct Cross Interchange | 1 |
| TRW | SFK14 | Indirect Cross Interchange | 4 |
| MINTEX | MBA521 | Indirect Cross Interchange | 3 |
| TEXTAR | 97001400 | Indirect Cross Interchange | 3 |
| TRISCAN | 8105292286 | Indirect Cross Interchange | 3 |
| NK | 7947521 | Indirect Cross Interchange | 2 |
| JURID | 771026J | Indirect Cross Interchange | 2 |
| TEXTAR | 97401001491 | Indirect Cross Interchange | 1 |
| TEXTAR | 974010014 | Indirect Cross Interchange | 1 |
| APEC braking | KIT721 | Indirect Cross Interchange | 1 |
| QUINTON HAZELL | BFK210 | Indirect Cross Interchange | 1 |
| BENDIX | 771026B | Indirect Cross Interchange | 1 |
| BENDIX | 334325B | Indirect Cross Interchange | 1 |
| BOSCH | 1987475042 | Indirect Cross Interchange | 1 |
| ATE | 03013790052 | Indirect Cross Interchange | 1 |
| LUCAS ELECTRICAL | SFK14 | Indirect Cross Interchange | 1 |