DENSO IU27Dequivalent & cross reference
The DENSO IU27D spark plug is directly equivalent to NGK CR9EIA-9, confirmed by shared applications in both manufacturers' official catalogues.
Equivalents
| Part | Shared applications | Agreement |
|---|---|---|
| NGK CR9EIA-9 | 14 | 100% |
Verified fitments for the DENSO IU27D
Equivalence confirmed by 3 independent sources, last verified 22 July 2026. Always confirm fitment against your owner's manual.