Audi Q5 Spark Plugs: Intervals, Fitment & Warning Signs
On the Q5, a coil pack replacement on related models genuinely hasn't always fixed a misfire, with worn plugs turning out to be the actual cause.
Illustration for editorial purposes
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Audi Q5 Spark Plugs: OEM Part Number
Audi Q5 Spark Plugs: A Cheap Part That Causes Expensive-Feeling Problems
Worn spark plugs on the Audi Q5 rarely announce themselves clearly — a slightly rougher idle, a bit less punch off the line — symptoms easy to blame on almost anything else in the engine bay. The part itself costs very little, which makes it an easy one to overlook for far longer than it should be.
Audi Q5 Spark Plugs: What They Do
The Audi Q5's spark plugs ignite the compressed fuel-air mixture inside each cylinder, and their condition directly affects combustion efficiency, fuel economy and smooth running. Petrol engines rely entirely on them; diesel engines don't use spark plugs at all, relying on compression instead.
Audi Q5 Spark Plugs: Generations, Engines & Spark Plug Count
| Diesel variants | Not applicable — diesel engines use compression ignition and have no spark plugs at all |
|---|---|
| Petrol four-cylinder (40 TFSI, 45 TFSI) | 4 spark plugs — one per cylinder |
| SQ5 (3.0 TFSI V6) | 6 spark plugs — a genuinely different engine family from the standard four-cylinder units |
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A Genuinely Useful Piece of Context Worth Knowing About Persistent Misfires — Audi Q5 Spark Plugs
If a coil pack replacement hasn't resolved a persistent misfire, this is genuinely worth knowing: documented cases on related Audi models describe a coil pack replaced for a specific cylinder's misfire, only for worn or carbon-fouled spark plugs to turn out to be the actual cause instead.
It's also genuinely worth knowing that failing to fully click the rear coil pack connectors back into place is a frequently documented cause of a misfire appearing immediately after fitting new coils, and that mixing coils from different sources rather than replacing them all together has been documented causing ongoing misfires.
Audi Q5 Spark Plugs: Warning Signs, DIY Difficulty & Aftermarket Advice
These are the same regardless of make or model — see our full Spark Plugs Guide for symptoms of worn plugs, why matching your exact plug specification matters, and trusted brands to buy from.
More Audi Spark Plugs
The same part, covered across other Audi models.