Knock Sensor: Labor Times
| Standard Hours | Manufacturer Warranty Hours | Skill Level | Notes | |
| Replace | ||||
| 323, 325, 330 | 3.0 | 2.1 | B | |
| 328i | 2.7 | 2.0 | B | |
| 328is, iC, Ci | 3.0 | 2.1 | B |
| Standard Hours | Manufacturer Warranty Hours | Skill Level | Notes | |
| Replace | ||||
| 323, 325, 330 | 3.0 | 2.1 | B | |
| 328i | 2.7 | 2.0 | B | |
| 328is, iC, Ci | 3.0 | 2.1 | B |