Keep the spark strong across a huge span of classic and modern engines with the Bosch Nickel Copper-Core Spark Plug (P/N 7905). This conventional nickel-copper plug is engineered to meet or exceed Original Equipment specifications and is a direct-fit replacement across 141 listed applications — from the 1971-1974 BMW 2002 [L4-2.0L] and 1974-1979 JAGUAR XJ6 [L6-4.2L] to the 1994-1997 FORD ASPIRE [L4-1.3L] and 1996-2002 LAND ROVER RANGE ROVER [V8-4.6L]. See the Buyer's Guide tab for the full list.
- Yttrium-enhanced center electrode: a nickel center electrode over a copper core, rated by Bosch for up to 50% longer performance life vs. standard copper plugs.
- Broader heat range: the copper core helps resist pre-ignition and fouling.
- Nickel-plated rolled threads: strong corrosion resistance, and no anti-seize required — saving install time.
- Anti-flash-over insulator & built-in resistor: the angled, ribbed ceramic insulator is designed to help prevent misfire from flash-over, while the metal-glass fused 6,000-ohm resistor helps suppress interference.
Specs: manufacturer heat range 8, projected ceramic insulator, flat seat, 19 mm reach, 20.8 mm hex, a single J-gap nickel ground electrode, non-removable nut terminal, and a pre-set .8 mm gap — confirm the correct gap for your engine before installing. This 4-cycle plug is sold individually (package quantity 1); the quantity needed varies by application (4, 6, 8, or 12 plugs). Country of origin: China. Manufacturer part number 7905.
Frequently Asked Questions
What vehicles does the Bosch 7905 spark plug fit?
It's listed for 141 applications, including the 1971-1974 BMW 2002 (L4-2.0L), 1974-1979 Jaguar XJ6 (L6-4.2L), and 1996-2002 Land Rover Range Rover (V8-4.6L). See the Buyer's Guide tab for the full list.
How many plugs do I need?
This listing is for one plug (package quantity 1). The number required varies by application — commonly 4, 6, 8, or 12 depending on the engine's cylinder count.
Does this plug come pre-gapped?
It ships with a pre-set .8 mm gap. Always confirm the correct gap specification for your engine before installing.
Do I need anti-seize on the threads?
No. Bosch states the nickel-plated rolled threads resist corrosion and do not require anti-seize, which saves installation time.
What is the benefit of the copper core?
Bosch pairs a yttrium-enhanced nickel center electrode with a copper core for a broader heat range that helps resist pre-ignition and fouling, with up to 50% longer life vs. standard copper plugs.