CarCareTruth Score
Decent.
Priced as of June 1, 2026
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Prices may varyThis product ranks #15 of 18 in Spark Plug.Three above it ↓
Last reviewed June 1, 2026
TL;DR Aftermarket double-iridium plug for Honda and Acura: iridium on both electrodes, factory-gapped at 1.1mm. Heat range is not disclosed, and there is a heat-range-mismatch complaint on a listed Honda Accord 2.4 (plugs running colder than the originals).
Laser-welded iridium center electrode and iridium ground inlay; nickel-plated rolled threads; factory gap set at 1.1mm. Bosch is the OE supplier for VAG and BMW engines; these Honda and Acura applications are aftermarket cross-references, not OE-confirmed fitment. No mileage interval is stated. The manufacturer does not publish the heat range for part number 9619, an unusual omission for a premium plug. Owner feedback is generally good, but on a listed Accord 2.4 owners have reported the plugs running colder than originals, consistent with a heat-range mismatch.
Honda and Acura owners wanting double-iridium metallurgy who accept aftermarket fitment. Skip if heat-range verification matters; Bosch does not publish it for part number 9619.
No chemical exposure from the plug. No interval is stated, so consumption benefit over copper alternatives is unknown. Steel shell is recyclable; alumina-ceramic insulator goes to landfill.
Marketing copy from Bosch, via Amazon. Not editorial.
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