Injector removal & installation: VW 2.3 (AZX)

🧭 Before you start

Fits: VW Passat B5 (3B)

Don't miss

• add. = additive means that the fault only has an effect at idling speed.
• Fault "“fuel level too low”" is also detected in connection with misfiring. This fault is not therefore sporadic, i.e. a subsequent fault in Lambda control or misfiring is also detected.

🔧 Engine codes this applies to

🔩 Torque settings

Values can differ between engine variants — check the code stamped on your block.

ℹ️ Always cross-check the exact figure against your vehicle's factory manual before final tightening — a wrong torque can damage the engine. These values are extracted from workshop data and may not cover every variant or revision.

📋 Procedure

1. Checking exhaust camshaft control valve 1 N318: , final control diagnosis
2. Checking Lambda probe heating before catalytic converter
3. Checking Lambda probe heating after catalytic converter
4. Checking Lambda probe and Lambda control before catalytic converter
5. Checking Lambda probe heating before catalytic converter

6. Checking Lambda probe heating after catalytic converter
7. Checking fuel pressure regulator and holding pressure .
8. Checking injectors , checking quantity injected and checking for leaks
9. Checking activated charcoal filter solenoid valve 1: Rep. Gr. 20; Activated charcoal filter system; Checking activated charcoal filter solenoid valve 1
10. Checking fuel pressure regulator and holding pressure .
11. Checking injectors , checking quantity injected and checking for leaks
12. Checking fuel pump: Rep. Gr. 20; Checking fuel pump
13. Check intake system for leaks
14. Checking exhaust system for leaks: Rep. Gr. 26; Removing and installing parts of exhaust system
15. Check secondary air system for leaks: Rep. Gr. 26; Secondary air system
16. Check vacuum lines for leaks
17. Checking fuel pressure regulator and holding pressure .
18. Checking injectors , checking quantity injected and checking for leaks
19. Check fuel pump: Rep. Gr. 20; Removing and installing parts of fuel supply system; Checking fuel pump
20. Check intake system for leaks
21. Checking exhaust system for leaks: Rep. Gr. 26; Removing and installing parts of exhaust system
22. Check secondary air system for leaks: Rep. Gr. 26; Secondary air system
23. Check vacuum lines for leaks [Note: add. = additive means that the fault only has an effect at idling speed.]
24. Checking fuel pressure regulator and holding pressure .
25. Checking injectors , checking quantity injected and checking for leaks
26. Checking activated charcoal filter solenoid valve 1: Rep. Gr. 20; Activated charcoal filter system; Checking activated charcoal filter solenoid valve 1 [Note: add. = additive means that the fault only has an effect at idling speed.]
27. Checking throttle valve control module
28. Check air mass meter
29. Checking accelerator position sender: Rep. Gr. 20; Electronic engine output control (electronic throttle control); Checking accelerator position sender
30. Checking fuel pressure regulator and holding pressure .
31. Checking injectors , checking quantity injected and checking for leaks
32. Checking fuel pump: Rep. Gr. 20; Checking fuel pump
33. Check intake system for leaks
34. Checking exhaust system for leaks: Rep. Gr. 26; Removing and installing parts of exhaust system
35. Check secondary air system for leaks: Rep. Gr. 26; Secondary air system
36. Check vacuum lines for leaks
37. Checking injectors , checking quantity injected and checking for leaks
38. Checking fuel pump: Rep. Gr. 20; Checking fuel pump
39. Check intake system for leaks
40. Checking exhaust system for leaks: Rep. Gr. 26; Removing and installing parts of exhaust system
41. Check secondary air system for leaks: Rep. Gr. 26; Secondary air system
42. Check vacuum lines for leaks
43. Checking fuel pressure regulator and holding pressure .
44. Checking injectors , checking quantity injected and checking for leaks
45. Checking activated charcoal filter solenoid valve 1: Rep. Gr. 20; Activated charcoal filter system; Checking activated charcoal filter solenoid valve 1
46. Checking fuel pressure regulator and holding pressure .
47. Checking injectors , checking quantity injected and checking for leaks
48. Checking activated charcoal filter solenoid valve 1: Rep. Gr. 20; Activated charcoal filter system; Checking activated charcoal filter solenoid valve 1
49. Checking throttle valve control module
50. Checking Lambda probe ageing bank 1 Lambda probe 1
51. Checking Lambda probe and Lambda control after catalytic converter
52. Check intake system for leaks
53. Checking Lambda probe and Lambda control before catalytic converter
54. Checking Lambda probe and Lambda control after catalytic converter
55. Checking Lambda probes for interchange ⇒ measured value block 39
56. Checking Lambda probe heating before catalytic converter
57. Checking Lambda probe heating after catalytic converter
58. Checking injectors .
59. Checking injectors .
60. Check coolant temperature sender [Note: Fault "“fuel level too low”" is also detected in connection with misfiring. This fault is not therefore sporadic, i.e. a subsequent fault in Lambda control or misfiring is also detected.]

Other VW procedures

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• Checking injectors for leaks and quantity injected – VW
• Checking accelerator position sender – VW
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• Checking intake manifold change-over – VW Golf IV / Bora
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• Removing and installing camshaft – VW Golf Cabriolet · 47 torque figures
• Adjusting valve timing – VW Passat B5 · 83 torque figures
• Removing and installing camshafts – VW Passat B6 · 39 torque figures
• Removing and installing coolant pump · 53 torque figures