Trade numbers: VR 7 NII 33 X 9621-4 Bosch Double Iridium Spark Plugs Bosch Double Iridium Spark Plugs are engineered to deliver both high performance and long life, representing advanced original equipment (OE) spark plug technology. The ultra-fine wire design and laser welded tapered ground electrode deliver optimum performance, while the iridium center electrode and ground electrode help it to go the distance. Unlock the performance in your engine with Bosch Double Iridium Spark Plugs. Key Features: Double Iridium electrodes offer higher performance. OE Replacement meets or exceeds manufacturer design requirements. A standard platinum plug can be upgraded to an iridium plug. If you vehicle service requirements require iridium as standard, it is recommended you replace with the equivalent iridium plug. OE-matched spark position for compatibility with Gasoline Direct Injection (GDI) technology. 4X Longer Service Life: compared to standard copper spark plugs. OEM: P51R-18-110 PE5R-18-110A PE5S-18-110 90118WB461 Fitment Table Make Model Badge MAZDA 2 1.5 MAZDA 3 2.0/2.0 SKYACTIV-G/2.5 SP25 (SP25) MAZDA 6 2.5 MAZDA CX-3 2.0 SKYACTIV-G/2.0 SKYACTIV-G AWD MAZDA CX-30 2.0 SKYACTIV-G MAZDA CX-5 2.0/2.0 AWD/2.5 AWD MAZDA MX-5 1.5/1.5 (ND6E)/2.0/2.0 (ND6E) MAZDA MX-5 RF 2.0/2.0 (ND6E)