When to replace the Thermostat on your AUDI A4
Recommended replacement interval for the part category Engine thermostat : 50000 km
Important!
This replacement procedure can be used for:
AUDI A4 Saloon (8D2, B5) 1.8, AUDI A4 Saloon (8D2, B5) 1.8 T, AUDI A4 Saloon (8D2, B5) 1.8 quattro, AUDI A4 Saloon (8D2, B5) 1.8 T quattro, AUDI A4 Saloon (8D2, B5) 1.8 T quattro, AUDI A4 Saloon (8D2, B5) 1.8 T, AUDI A4 Saloon (8D2, B5) 1.8, AUDI A4 Saloon (8D2, B5) 1.8 quattro, AUDI A4 Saloon (8D2, B5) 1.6 View more

The steps may slightly vary depending on the car design.

How to change engine thermostat on AUDI A4 B5 Saloon [TUTORIAL AUTODOC]

video
All the parts you need to replace – Thermostat for A4 Saloon (8D2, B5) and other AUDI models
How to change Engine thermostat on Audi A4 B5 1.6 – step-by-step instructions for straightforward car repair Engine thermostat
How to change Thermostat Housing on Audi A4 B5 1.6 – step-by-step instructions for straightforward car repair Thermostat Housing
How to change Thermostat, coolant on Audi A4 B5 1.6 – step-by-step instructions for straightforward car repair Thermostat, coolant
Tools
Replacement: engine thermostat – Audi A4 B5 saloon. Tools you might need:
Wire brush
All-purpose cleaning spray
Electronic spray
Sealant
Torque wrench
Combination spanner #10
Combination spanner #13
Combination spanner #17
Combination spanner #46
Drive socket # 10
Drive socket # 13
HEX bit No.H5
HEX bit No.H8
Ratchet wrench
Funnel
Fluid container
Pincers
Fender cover
Replacement: engine thermostat – Audi A4 B5 saloon. AUTODOC experts recommend:
  • Check the condition of the coolant every time you replace the thermostat. Change the coolant if necessary.
  • All work should be done with the engine stopped.
Carry out replacement in the following order:
  1. Step 1
    How to change Thermostat on Audi A4 B5 1994 - free PDF and video manuals
    Open the hood.
  2. Step 2
    How to replace AUDI A4 Saloon (8D2, B5) 1.6 1995 Thermostat - step-by-step manuals and video guides
    Use a fender protection cover to prevent damaging paintwork and plastic parts of the car.
  3. Step 3
    Audi A4 B5 1.9 TDI 1996 Thermostat replacement: free workshop manuals
    Unscrew the engine cover fastener. Use HEX No.H5. Use a ratchet wrench.
  4. Step 4
    Changing Thermostat on AUDI A4 Saloon (8D2, B5) 1.8 T 1997 by yourself
    Remove the engine cover.
    AUTODOC recommends:
    Replacement: engine thermostat – Audi A4 B5 saloon. Do not use excessive force when removing the part as this may damage it.
  5. Step 5
    How to remove AUDI A4 1.8 T quattro 1998 Thermostat - online easy-to-follow instructions
    Unscrew the coolant reservoir cap.
  6. Step 6
    How to replace Thermostat on AUDI A4 Saloon (8D2, B5) 1999: download PDF manuals and video instructions
    Prepare a container for fluids.
  7. Step 7
    How hard is it to do yourself: Thermostat replacement on Audi A4 B5 S4 2.7 quattro 2000 - download illustrated guide
    Clean the coolant hose. Use all-purpose cleaning spray.
  8. Step 8
    Need to know how to renew Thermostat on AUDI A4 2001? This free workshop manual will help you to do it yourself
    Disconnect the coolant pipe retaining clip.
  9. Step 9
    Changing of Thermostat on Audi A4 B5 1994 won't be an issue if you follow this illustrated step-by-step guide
    Detach the coolant hose.
    Replacement: engine thermostat – Audi A4 B5 saloon. Professionals recommend:
    Caution! Coolant may leak out of the coolant lines and thermostat housing.
  10. Step 10
    AUDI A4 1.6 Thermostat replacement: online guides and video tutorials
    Drain the coolant from the engine.
    Replacement: engine thermostat – Audi A4 B5 saloon. Tip:
    Caution! The coolant can be very hot.Wear gloves to prevent contact with hot liquid.All work should be done with the engine stopped.Wait until the coolant has completely flowed out of the drain hole.
  11. Step 11
    Replacing Thermostat on Audi A4 B5 1996 1.6 by yourself
    Clean the coolant hose. Use all-purpose cleaning spray.
  12. Step 12
    A4 Saloon (8D2, B5) 1.8 T quattro 1997 Thermostat DIY replacement workshop manual
    Attach the coolant hose.
  13. Step 13
    Connect the coolant pipe retaining clip.
    Step 14
    How to change Thermostat on AUDI A4 Saloon (8D2, B5) 1998 - tips and tricks
    Clean the coolant hose. Use all-purpose cleaning spray.
  14. Step 15
    Step-by-step recommendations for DIY replacement Audi A4 B5 1999 1.8 T quattro Thermostat
    Pull aside the V-ribbed belt tensioner pulley. Use a combination spanner #17.
  15. Step 16
    DIY replacement of Thermostat on AUDI A4 Saloon (8D2, B5) 1.8 2000 is not an issue anymore with our step-by-step tutorial
    Remove the V-ribbed belt.
    Replacement: engine thermostat – Audi A4 B5 saloon. Tip from AUTODOC:
    Check the condition of the tensioner pulley and idler pulley. Replace them if necessary.
  16. Step 17
    How to change Thermostat on Audi A4 B5 1994 - free PDF and video manuals
    Return the tensioner pulley to its initial position.
  17. Step 18
    How to replace AUDI A4 Saloon (8D2, B5) 1.6 1995 Thermostat - step-by-step manuals and video guides
    Remove the battery cover.
  18. Step 19
    Audi A4 B5 1.9 TDI 1996 Thermostat replacement: free workshop manuals
    Unscrew the fasteners of the car battery terminals. Use a combination spanner #10.
  19. Step 20
    Changing Thermostat on AUDI A4 Saloon (8D2, B5) 1.8 T 1997 by yourself
    Remove the battery terminals.
  20. Step 21
    How to remove AUDI A4 1.8 T quattro 1998 Thermostat - online easy-to-follow instructions
    Loosen the alternator fasteners. Use HEX No.H8.
  21. Step 22
    How to replace Thermostat on AUDI A4 Saloon (8D2, B5) 1999: download PDF manuals and video instructions
    Unscrew the fastener of the viscous fan clutch. Use a combination spanner #46. Use HEX No.H8.
  22. Step 23
    How hard is it to do yourself: Thermostat replacement on Audi A4 B5 S4 2.7 quattro 2000 - download illustrated guide
    Loosen the alternator fasteners. Use HEX No.H8.
  23. Step 24
    Need to know how to renew Thermostat on AUDI A4 2001? This free workshop manual will help you to do it yourself
    Remove the alternator.
  24. Step 25
    Changing of Thermostat on Audi A4 B5 1994 won't be an issue if you follow this illustrated step-by-step guide
    Disconnect the alternator connector.
  25. Step 26
    AUDI A4 1.6 Thermostat replacement: online guides and video tutorials
    Unscrew the alternator power cable fastener. Use a combination spanner #13.
  26. Step 27
    Replacing Thermostat on Audi A4 B5 1996 1.6 by yourself
    Clean the thermostat housing. Use all-purpose cleaning spray.
  27. Step 28
    A4 Saloon (8D2, B5) 1.8 T quattro 1997 Thermostat DIY replacement workshop manual
    Unscrew the thermostat housing fasteners. Use a drive socket #10. Use a ratchet wrench.
  28. Step 29
    How to change Thermostat on AUDI A4 Saloon (8D2, B5) 1998 - tips and tricks
    Remove the thermostat housing.
    AUTODOC recommends:
    Replacement: engine thermostat – Audi A4 B5 saloon. Do not use excessive force when removing the part as this may damage it.
  29. Step 30
    Step-by-step recommendations for DIY replacement Audi A4 B5 1999 1.8 T quattro Thermostat
    Remove the thermostat. Use pincers.
    Replacement: engine thermostat – Audi A4 B5 saloon. Tip:
    Do not apply excessive force when removing the part. Otherwise you may damage it.Caution! Coolant may leak out of the coolant lines and thermostat housing.
  30. Step 31
    DIY replacement of Thermostat on AUDI A4 Saloon (8D2, B5) 1.8 2000 is not an issue anymore with our step-by-step tutorial
    Clean the thermostat housing mounting seat. Use a wire brush. Use all-purpose cleaning spray.
  31. Step 32
    Install a new thermostat.
    AUTODOC recommends:
    Replacement: engine thermostat – Audi A4 B5 saloon. Do not use excessive force during installation. This may damage the part.
    Step 33
    How to change Thermostat on Audi A4 B5 1994 - free PDF and video manuals
    Treat the thermostat housing. Use a sealant.
  32. Step 34
    How to replace AUDI A4 Saloon (8D2, B5) 1.6 1995 Thermostat - step-by-step manuals and video guides
    Install the thermostat housing.
    Replacement: engine thermostat – Audi A4 B5 saloon. Tip from AUTODOC:
    When installing, do not use excessive force to avoid damage to the part.
  33. Step 35
    Audi A4 B5 1.9 TDI 1996 Thermostat replacement: free workshop manuals
    Tighten the thermostat housing fasteners. Use a drive socket #10. Use a torque wrench. Tighten it to 6 nm torque.
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DIY AUDI A4 Saloon (8D2, B5) Thermostat replacement - online guide
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