Air Injection Check Valve: Labor Times
| Standard Hours | Manufacturer Warranty Hours | Skill Level | Notes | |
| Replace | ||||
| 525i, 525xi, 530i, 530xi | 0.4 | 0.3 | B | |
| 545i, 550i | 3.5 | 2.5 | B |
| Standard Hours | Manufacturer Warranty Hours | Skill Level | Notes | |
| Replace | ||||
| 525i, 525xi, 530i, 530xi | 0.4 | 0.3 | B | |
| 545i, 550i | 3.5 | 2.5 | B |