Bosch FR78 Spark Plug
Specs, cross-brand equivalents, vehicle fitment, and live prices for the Bosch FR78.
The Bosch FR78 is a 14mm thread, 19mm reach, gasket seat, copper electrode spark plug, pre-gapped to 0.035. 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 | IK20 | Iridium | Buy |
| Denso | K20TXR | Copper | Buy |
| Bosch | FGR7DQP | Platinum | Buy |
| Bosch | FR8KDC | Copper | Buy |
| Bosch | FR8LDC | Copper | Buy |
| Bosch | FR8LDC4 | Copper | Buy |
| Beru | 14F-7LDUR4 | — | Buy |
| Beru | 14F7LDURZ14 | — | Buy |
| Beru | 14F7LDUWZ257 | — | Buy |
| Beru | 14F-8LDUSR | — | Buy |
| Beru | 14FLR-8LDUX | — | Buy |
| Beru | 14FR-7KDU | — | Buy |
| Beru | 14FR-8LDU | — | Buy |
| Beru | 14FR-8LDU4 | — | Buy |
| Beru | Z-101 | — | Buy |
| Beru | Z123 | — | Buy |
| Beru | Z14 | — | Buy |
| Beru | Z74 | — | Buy |
| Bosch | F7LDCR | Copper | Buy |
| Bosch | F8LDCR | Copper | Buy |
| Bosch | FLR7LDCU | Copper | Buy |
| Bosch | FLR8LDCU | Copper | Buy |
| Bosch | FLR8LDSU | Copper | Buy |
| Bosch | FR78ME | Copper | Buy |
| Bosch | FR78X | Copper | Buy |
| Bosch | FR7KDC | Copper | Buy |
| Bosch | FR7LDC | Copper | Buy |
| Bosch | FR7LDC4 | Copper | Buy |
| Bosch | FR7LDCU | Copper | Buy |
| Champion | C9BMC | Copper | Buy |
| Champion | RC9DMC | Copper | Buy |
| Denso | 067700-8690 | — | Buy |
| FC58LS2E | — | Buy | |
| RFC52LS2E | — | Buy | |
| RFC52LSP | — | Buy | |
| RFC58LS2E | — | Buy | |
| RFC58LSP | — | Buy | |
| RFC58LZ2E | — | Buy | |
| NGK | 2288 | — | Buy |
| NGK | 4388 | — | Buy |
Showing the 40 closest cross-references of 42 total interchangeable part numbers for this plug.
Vehicles the FR78 fits
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.