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Cross Interchange Part No. for: NGK 4121
| Factory | Number | Cross Interchange Type | Relevance |
|---|---|---|---|
| DENSO | W22EB | Direct Cross Interchange | 1 |
| DENSO | W22EBR | Direct Cross Interchange | 1 |
| AUTOLITE | AR2594 | Direct Cross Interchange | 1 |
| MAZDA | 364818600 | Direct Cross Interchange | 1 |
| AUTOLITE | 2526 | Indirect Cross Interchange | 2 |
| DENSO | 4046 | Indirect Cross Interchange | 1 |
| DENSO | W27ESU | Indirect Cross Interchange | 1 |
| MOTORCRAFT | AG091 | Indirect Cross Interchange | 1 |
| MOTORCRAFT | AG901 | Indirect Cross Interchange | 1 |
| ACDelco | 41XL | Indirect Cross Interchange | 1 |
| ACDelco | R41CXL | Indirect Cross Interchange | 1 |
| NGK | 2611 | Indirect Cross Interchange | 1 |
| NGK | 3121 | Indirect Cross Interchange | 1 |
| NGK | 3821 | Indirect Cross Interchange | 1 |
| NGK | 7148 | Indirect Cross Interchange | 1 |
| NGK | B7EM | Indirect Cross Interchange | 1 |
| NGK | B7ET | Indirect Cross Interchange | 1 |
| NGK | B9ES | Indirect Cross Interchange | 1 |
| NGK | BR7EM | Indirect Cross Interchange | 1 |
| NGK | BR7ET | Indirect Cross Interchange | 1 |
| NGK | BR8ESS25 | Indirect Cross Interchange | 1 |
| BOSCH | 7530 | Indirect Cross Interchange | 1 |
| BOSCH | W260T2 | Indirect Cross Interchange | 1 |
| BOSCH | W4C1 | Indirect Cross Interchange | 1 |
| BOSCH | W4CC | Indirect Cross Interchange | 1 |
| CHAMPION | QN2C | Indirect Cross Interchange | 1 |
| CHAMPION | QN2G | Indirect Cross Interchange | 1 |
| CHAMPION | RN2C | Indirect Cross Interchange | 1 |
| CHAMPION | RN2G | Indirect Cross Interchange | 1 |