Bosch WR9FPZ4 Spark Plug
Specs, cross-brand equivalents, vehicle fitment, and live prices for the Bosch WR9FPZ4.
The Bosch WR9FPZ4 is a heat range 9, platinum electrode spark plug. These specifications are decoded from the Bosch part number and determine which plugs it safely cross-references to — a valid equivalent must match the thread, reach, seat and heat range.
Cross-reference equivalents
| Brand | Part | Metal | Buy |
|---|---|---|---|
| Denso | W14PR-U | Copper | Buy |
| ACDelco | 41-818 | — | Buy |
| ACDelco | R46SZ | — | Buy |
| Autolite | AP847 | Platinum | Buy |
| Autolite | AP85 | Platinum | Buy |
| Bosch | 4022 | — | Buy |
| Bosch | 4023 | — | Buy |
| Bosch | 4122 | — | Buy |
| Bosch | 4123 | — | Buy |
| Bosch | 4222 | — | Buy |
| Bosch | 4223 | — | Buy |
| Bosch | WR9FP4 | Platinum | Buy |
| Bosch | WR9FPY | Platinum | Buy |
| Bosch | WR9FPY4 | Platinum | Buy |
| Champion | 66C2 | Copper | Buy |
| Champion | RJ18YC6 | Copper | Buy |
| Denso | 067700-2931 | — | Buy |
| Denso | 6021 | — | Buy |
| NGK | 3348 | — | Buy |
| NGK | 5485 | — | Buy |
| NGK | 7293 | — | Buy |
| NGK | XR45IX | Iridium | Buy |
| Split Fire | PP084G | — | Buy |
Affiliate disclosure: As an Amazon Associate and affiliate partner we earn from qualifying purchases. Always confirm fitment against your owner's manual or the manufacturer catalog before buying.