Parts Information
| Part | Manufacturer | OEM Part # | Price | Notes |
| Horn |
| M3 |
| High Note | BMW | 61338370500 | 37.80 | |
| Low Note | BMW | 61337164003 | 53.67 | |
| 318, 328 |
| High Note |
| Fiamm | BMW | 61338370500 | 37.80 | |
| Hella | BMW | 61338372738 | 53.67 | |
| Low Note |
| Fiamm | BMW | 61337164003 | 53.67 | |
| Hella | BMW | 61338372737 | 53.67 | |
| 318ti |
| High Note |
| Fiamm | BMW | 61338370500 | 37.80 | |
| Hella | BMW | 61338372738 | 53.67 | |
| Low Note |
| Fiamm | BMW | 61337164003 | 53.67 | |
| Hella | BMW | 61338372737 | 53.67 | |
| 328 & 330i, Ci, xi |
| High Note | BMW | 61338379712 | 53.67 | |
| Low Note |
| Bosch | BMW | 61338379711 | 53.67 | |
| Hella | BMW | 61338375493 | 52.30 | |
| 323is, iC |
| High Note |
| Fiamm | BMW | 61338370500 | 37.80 | |
| Hella | BMW | 61338372738 | 53.67 | |
| Low Note |
| Fiamm | BMW | 61337164003 | 53.67 | |
| Hella | BMW | 61338372737 | 53.67 | |