The exact spark plug your Prius takes, plus the gap and the change interval — cross-checked against two independent maker sources so you buy the right plug the first time.
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1.5L I4 · 2004-20091.5L-I4
Spark plug part number
Confirmed from NGK + Denso · verified Jun 2026.
Gap
0.039 in (0.99 mm)
We don't stock a reviewed plug for this engine yet. Search the confirmed part number on Amazon — it's the safest way to land on the right plug.
Find NGK BKR5EGP on AmazonPart number and gap confirmed against two independent maker sources — never changed by what an affiliate link pays us. Heat range is shown per brand on purpose: a Denso number and an NGK number don't mean the same thing, so never compare them directly. Your owner's manual is always the final word.
