When to replace the Spark Plug on your AUDI A8
Recommended replacement interval for the part category Spark plug : 6 year / 60000 km
This replacement procedure can be used for:
AUDI A8 (4H2, 4H8, 4HC, 4HL) 2.0 TFSI hybrid View more

The steps may slightly vary depending on the car design.

This video shows the replacement procedure of a similar car part on another vehicle

All the parts you need to replace – Spark Plug for A8 (4H2, 4H8, 4HC, 4HL) and other AUDI models
Replacement: spark plugs – AUDI A8 (4H_). Tools you might need:
High-temperature anti-seize lubricant
Torx bit T30
Spark plug socket # 16
Ratchet wrench
Torque wrench
Telescoping magnet
Fender cover
Replacement: spark plugs – AUDI A8 (4H_). AUTODOC experts recommend:
  • The replacement procedure is the same for all spark plugs.
  • Please note: all work on the car – AUDI A8 (4H_) – should be done with the engine switched off.
Replacement: spark plugs – AUDI A8 (4H_). Take the following steps:
  1. Step 1
    Open the hood.
    Step 2
    Use a fender protection cover to prevent damaging paintwork and plastic parts of the car.
    Step 3
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    Remove the engine cover.
    Replacement: spark plugs – AUDI A8 (4H_). Tip:
    Raise the engine cover, holding it on two sides simultaneously.Do not apply excessive force when removing the part. Otherwise you may damage it.
  2. Step 4
    How to replace AUDI A8 (4H2, 4H8, 4HC, 4HL) 4.2 TDI quattro 2010 Spark Plug - step-by-step manuals and video guides
    Unscrew the fasteners of the ignition coil harness retainer. Use Torx T30. Use a ratchet wrench.
  3. Step 5
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    Unplug the connectors from the ignition coils.
  4. Step 6
    Changing Spark Plug on AUDI A8 (4H2, 4H8, 4HC, 4HL) 4.2 FSI quattro 2012 by yourself
    Take out the ignition coils from the spark plug wells.
    Replacement: spark plugs – AUDI A8 (4H_). AUTODOC recommends:
    Remember the sequence of steps for ignition coil demounting.
  5. Step 7
    How to remove AUDI A8 6.3 W12 quattro 2013 Spark Plug - online easy-to-follow instructions
    Clean dirt, dust and debris from inside the spark plug wells.
  6. Step 8
    How to replace Spark Plug on AUDI A8 (4H2, 4H8, 4HC, 4HL) 2014: download PDF manuals and video instructions
    Unscrew the spark plugs. Use the spark plug socket #16. Use a ratchet wrench.
  7. Step 9
    How hard is it to do yourself: Spark Plug replacement on Audi A8 D4 4.2 TDI quattro 2015 - download illustrated guide
    Take out the spark plugs. Use a telescoping magnet.
  8. Step 10
    Need to know how to renew Spark Plug on AUDI A8 2016? This free workshop manual will help you to do it yourself
    Apply a thin layer of a special high temperature anti-seize lubricant to the threads of the new spark plugs.
  9. Step 11
    Changing of Spark Plug on Audi A8 D4 2017 won't be an issue if you follow this illustrated step-by-step guide
    Install the new spark plugs into their mounting seats. Use the spark plug socket #16.
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DIY AUDI A8 (4H2, 4H8, 4HC, 4HL) Spark Plug replacement - online guide
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