1994–2011 Audi A6 4.2L Spark Plugs
Catalog-listed plug, cross-brand equivalents, gap, and where to buy for the 1994–2011 Audi A6 4.2L.
Listed in a manufacturer plug catalog — confirm against your owner's manual before buying.
The Denso IK22 is a 14mm thread, 19mm reach, gasket seat, heat range 22, iridium electrode spark plug. These specifications are decoded from the Denso part number and determine which plugs it safely cross-references to — a valid equivalent must match the thread, reach, seat and heat range.
Spark plugs that fit the 1994–2011 Audi A6 4.2L
| Plug | Metal | Gap | Buy |
|---|---|---|---|
| Denso IK22 | Iridium | — | Buy |
| Denso VK22 | Iridium | — | Buy |
| Denso IK20 | Iridium | — | Buy |
| Denso IK20TT | Iridium | — | Buy |
| Denso VK20 | Iridium | — | Buy |
| Denso VKB20 | Iridium | — | Buy |
| Denso VK20Y | Iridium | — | Buy |
| Denso K20TT | Copper | — | Buy |
| Denso K20TXR | Copper | — | Buy |
| Denso K20PBR-S10 | Copper | — | Buy |
Frequently asked questions
What spark plug does a 1994–2011 Audi A6 4.2L use?
A manufacturer catalog lists the Denso IK22 (Iridium), gapped at the factory spec. Listed in a manufacturer plug catalog — confirm against your owner's manual before buying.
How many spark plugs does a 1994–2011 Audi A6 4.2L need?
Check your owner's manual for the exact count for this engine.
What is the spark plug gap for a 1994–2011 Audi A6 4.2L?
See the underhood emissions label — always confirm against the label or manual before installing.
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