When to replace the Spark Plug on your AUDI A6
Recommended replacement interval for the part category Spark plug : 6 year / 60000 km
Important!
This replacement procedure can be used for:
AUDI A6 Avant (4B5, C5) 2.4 quattro, AUDI A6 Avant (4B5, C5) 2.8 quattro, AUDI A6 Avant (4B5, C5) 2.8, AUDI A6 Avant (4B5, C5) 2.4, AUDI A6 Avant (4B5, C5) 2.8, AUDI A6 Avant (4B5, C5) 2.8, AUDI A6 Avant (4B5, C5) 2.4, AUDI A6 Avant (4B5, C5) 2.4, AUDI A6 Avant (4B5, C5) 2.4 quattro, AUDI A6 Avant (4B5, C5) 3.0, AUDI A6 Avant (4B5, C5) 3.0 quattro, AUDI A6 Avant (4B5, C5) 2.4, AUDI A6 Avant (4B5, C5) 2.4 quattro, AUDI A6 Avant (4B5, C5) 2.4 quattro, AUDI A6 Avant (4B5, C5) 3.0 View more

The steps may slightly vary depending on the car design.

How to change spark plug on AUDI A6 C5 Avant [TUTORIAL AUTODOC]

video
All the parts you need to replace – Spark Plug for A6 Avant (4B5, C5) and other AUDI models
Tools
Replacement: spark plugs – Audi A6 C5 Avant. Tools you might need:
High-temperature anti-seize lubricant
Torque wrench
Spark plug socket # 16
Torx bit T25
Ratchet wrench
Flat screwdriver
Fender cover
Replacement: spark plugs – Audi A6 C5 Avant. AUTODOC experts recommend:
  • The replacement procedure is the same for all spark plugs.
  • All work should be done with the engine stopped.
Replacement: spark plugs – Audi A6 C5 Avant. Take the following steps:
  1. Step 1
    How to change Spark Plug on Audi A6 C5 Avant 1997 - free PDF and video manuals
    Open the hood.
  2. Step 2
    How to replace AUDI A6 Avant (4B5, C5) 2.5 TDI quattro 1998 Spark Plug - 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 A6 C5 Avant 1.9 TDI 1999 Spark Plug replacement: free workshop manuals
    Unscrew the fasteners of the air distribution housing assembly. Use a Phillips screwdriver.
  4. Step 4
    Changing Spark Plug on AUDI A6 Avant (4B5, C5) 2.5 TDI 2000 by yourself
    Remove the air distribution housing assembly.
  5. Step 5
    How to remove AUDI A6 1.8 T 2001 Spark Plug - online easy-to-follow instructions
    Unscrew the engine cover fastener. Use a flat screwdriver.
  6. Step 6
    How to replace Spark Plug on AUDI A6 Avant (4B5, C5) 2002: download PDF manuals and video instructions
    Remove the engine cover.
    AUTODOC recommends:
    Replacement: spark plugs – Audi A6 C5 Avant. Do not use excessive force when removing the part as this may damage it.
  7. Step 7
    How hard is it to do yourself: Spark Plug replacement on Audi A6 C5 Avant 1.8 T quattro 2003 - download illustrated guide
    Unscrew the engine cover fastener. Use a flat screwdriver.
  8. Step 8
    Need to know how to renew Spark Plug on AUDI A6 2004? This free workshop manual will help you to do it yourself
    Remove the engine cover.
    Replacement: spark plugs – Audi A6 C5 Avant. Professionals recommend:
    Do not apply excessive force when removing the part. Otherwise you may damage it.
  9. Step 9
    Changing of Spark Plug on Audi A6 C5 Avant 2005 won't be an issue if you follow this illustrated step-by-step guide
    Unscrew the fasteners of the coolant reservoir. Use Torx T25. Use a ratchet wrench.
  10. Step 10
    AUDI A6 1.9 TDI Spark Plug replacement: online guides and video tutorials
    Remove the coolant reservoir.
  11. Step 11
    Replacing Spark Plug on Audi A6 C5 Avant 1998 2.5 TDI quattro by yourself
    Unscrew the engine cover fastener. Use a flat screwdriver.
  12. Step 12
    A6 Avant (4B5, C5) 1.8 T 1999 Spark Plug DIY replacement workshop manual
    Remove the engine cover.
    AUTODOC recommends:
    Replacement: spark plugs – Audi A6 C5 Avant. To avoid damaging the part when removing it, do not use excessive force.
  13. Step 13
    How to change Spark Plug on AUDI A6 Avant (4B5, C5) 2000 - tips and tricks
    Remove the spark plug wire connectors from the spark plug wells.
    Replacement: spark plugs – Audi A6 C5 Avant. Professionals recommend:
    Be careful to avoid damaging spark plug wires.Remember the sequence of the spark plug wires connectors.
  14. Step 14
    Step-by-step recommendations for DIY replacement Audi A6 C5 Avant 2001 1.8 T Spark Plug
    Clean dirt, dust and debris from inside the spark plug wells.
  15. Step 15
    DIY replacement of Spark Plug on AUDI A6 Avant (4B5, C5) 2.4 2002 is not an issue anymore with our step-by-step tutorial
    Unscrew the spark plugs. Use the spark plug socket #16. Use a ratchet wrench.
  16. Step 16
    How to change Spark Plug on Audi A6 C5 Avant 1997 - free PDF and video manuals
    Take out the spark plugs.
  17. Step 17
    How to replace AUDI A6 Avant (4B5, C5) 2.5 TDI quattro 1998 Spark Plug - step-by-step manuals and video guides
    Apply a thin layer of a special high temperature anti-seize lubricant to the threads of the new spark plugs.
  18. Step 18
    Audi A6 C5 Avant 1.9 TDI 1999 Spark Plug replacement: free workshop manuals
    Install the new spark plugs into their mounting seats. Use the spark plug socket #16.
  19. Step 19
    Changing Spark Plug on AUDI A6 Avant (4B5, C5) 2.5 TDI 2000 by yourself
    Screw new spark plugs and tighten them. Use the spark plug socket #16. Use a torque wrench. Tighten it to 24 nm torque.
    Replacement: spark plugs – Audi A6 C5 Avant. AUTODOC experts recommend:
    Don't tighten the plugs with excessive force. Exceeding tightening torque can damage the thread connection. Be careful when working with a spark plug wrench. Its skewing can cause damage to the threaded connection.
  20. Step 20
    How to remove AUDI A6 1.8 T 2001 Spark Plug - online easy-to-follow instructions
    Install the spark plug wire connectors into the spark plug wells. Make sure you hear a click indicating that it is locked in place.
    Replacement: spark plugs – Audi A6 C5 Avant. Tip:
    Follow the installation sequence.
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DIY AUDI A6 Avant (4B5, C5) Spark Plug replacement - online guide
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