Knock Sensor: Labor Times
| Standard Hours | Manufacturer Warranty Hours | Skill Level | Notes | |
| Replace | ||||
| 525i, 525xi, 530i, 530xi | 3.0 | 2.3 | B | |
| 545i, 550i | ||||
| Right | 3.0 | 2.3 | B | |
| Left | 3.0 | 2.3 | B | |
| Both | 3.2 | 2.4 | B |
| Standard Hours | Manufacturer Warranty Hours | Skill Level | Notes | |
| Replace | ||||
| 525i, 525xi, 530i, 530xi | 3.0 | 2.3 | B | |
| 545i, 550i | ||||
| Right | 3.0 | 2.3 | B | |
| Left | 3.0 | 2.3 | B | |
| Both | 3.2 | 2.4 | B |