Bosch 7909 Nickel Copper Spark Plug — BMW E30 / E28 / E34 / E24

Installation Note: Recommended spark plug gap is 0.028–0.032 inches. Always verify gap prior to installation.

The Bosch 7909 Nickel Copper Spark Plug is a direct OEM-quality replacement engineered for classic BMW inline engines. Featuring a yttrium-enhanced nickel-copper center electrode, the 7909 delivers up to 50% longer service life compared to standard copper plugs while maintaining the broad heat range these motors demand. Nickel-plated rolled threads resist corrosion and eliminate the need for anti-seize — saving time on installation. Sold individually. Most applications require 4 or 6 plugs.

Key Features:

• Yttrium-enhanced nickel-copper center electrode — up to 50% longer service life
• Copper core provides broader heat range to resist pre-ignition and fouling
• Nickel-plated rolled threads — corrosion resistant, no anti-seize required
• Angled ribbed insulator design prevents misfire due to flash-over
• Metal glass fused resistor maximizes interference suppression

Fitment:

• BMW 3 Series (E30): 325, 325e, 325es, 325i, 325is, 325iX (1984–1993)
• BMW 5 Series (E28 & E34): 525i, 528e, 535i (1982–1995)
• BMW 6 Series (E24): 633CSi, 635CSi (1980–1989)
• BMW 7 Series (E23 & E32): 733i, 735i (1980–1992)