Spark Plug Specifications
4
Plugs Required
0.8 mm
Electrode Gap
60K mi
Change Interval
| Parameter | Specification |
|---|---|
| Plug Number | Denso FK20HBR-S8 |
| Type | Iridium |
| Electrode Gap | 0.8 mm |
| Quantity Required | 4 |
| Change Interval | Every 60,000 miles |
Diesel note: Diesel engines use glow plugs instead of spark plugs. If your Toyota Aygo X is a diesel variant, the spark plug data above applies only to petrol models. Consult your handbook for the correct glow plug specification.
Recommended Spark Plugs for Toyota Aygo X
Denso FK20HBR-S8 (Set of 4)
Iridium | OE spec | Pre-gapped to 0.8 mm
From ~£24
Bosch Iridium Spark Plug Set
OE supplier | German quality | Set of 4
From ~£20
Frequently Asked Questions
What spark plugs does a Toyota Aygo X use?
The Toyota Aygo X (Mk1) uses Denso FK20HBR-S8 iridium spark plugs. The gap should be set to 0.8 mm. You need 4 plugs for a full set.
How often should I change spark plugs on a Toyota Aygo X?
Every 60,000 miles for iridium plugs. Iridium and double iridium plugs last longer than standard copper or nickel plugs.
Can I use a different brand of spark plug in my Toyota Aygo X?
Yes, as long as it matches the exact specification — same heat range, thread size, reach, and gap (0.8 mm). Denso FK20HBR-S8 from any major manufacturer (NGK, Denso, Bosch, Champion) will work.
What are the signs of worn spark plugs?
Rough idle, poor fuel economy, hesitation during acceleration, engine misfires, and difficulty starting. If your engine management light comes on with a misfire code, spark plugs are a common culprit.