Spark Plug Specifications
Applies to petrol (A25A-FKS) and 2.5 Hybrid/PHEV (A25A-FXS) XA50 RAV4 — all use the same 4-cylinder iridium plug.
| Parameter | Specification |
|---|---|
| Plug Number | Denso FC16HR-Q8 |
| Type | Iridium |
| Electrode Gap | 0.8 mm |
| Quantity Required | 4 |
| Change Interval | Every 120,000 miles (inspect at 60,000) |
Recommended Spark Plugs for Toyota RAV4
Bosch Iridium Spark Plug Set
Frequently Asked Questions
What spark plugs does a Toyota RAV4 use?
The Toyota RAV4 (Mk5) uses Denso FC16HR-Q8 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 RAV4?
Every 120,000 miles (inspect at 60,000) 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 RAV4?
Yes, as long as it matches the exact specification — same heat range, thread size, reach, and gap (0.8 mm). Any plug matching the OE spec (a Denso FC16HR-Q8 equivalent — same heat range, thread, reach and 0.8 mm gap) will work; cross-reference NGK/Bosch/Champion to it.
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.
How we check fitment for this guide
We cross-reference fitment figures against manufacturer specifications and OE-supplier catalogue data where available, and matched to the standard codes that actually govern fit — battery type/group sizes, wiper lengths and fitting types, bulb fitment codes, tyre size markings, and oil specifications. We work by make, model, year, engine, and build date, because a single model can take different parts across its life. Where the right part depends on your exact vehicle, we tell you to confirm by registration or VIN. More on our method →