Parts Information
| Part | Manufacturer | OEM Part # | Price | Notes |
| Horn | ||||
| M3 | ||||
| High Note | BMW | 61337833013 | 53.67 | |
| Low Note | BMW | 61337833012 | 53.67 | |
| 323 & 325i, Ci, it, xi | ||||
| High Note | BMW | 61338379712 | 53.67 | |
| Low Note | ||||
| Bosch | BMW | 61338379711 | 53.67 | |
| Hella | BMW | 61338375493 | 52.30 | |
| 328 & 330i, Ci, xi | ||||
| High Note | BMW | 61338379712 | 53.67 | |
| Low Note | ||||
| Bosch | BMW | 61338379711 | 53.67 | |
| Hella | BMW | 61338375493 | 52.30 |