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