NGK 4294 Spark Plug

NGK Laser Iridium Spark Plug 4294

NGK Laser Iridium Spark Plug 4294 is an OE-style ignition component built for precise spark delivery and stable engine performance. It uses an iridium center electrode, nickel ground electrode, and a 0.044 in pre-gap to match the listed BMW applications.

The Laser Iridium line focuses on OE-level fit and durability, backed by NGK’s long history as a major original equipment supplier for domestic and import vehicles. For BMW 550i, 650i, X5, 750i, and 750Li applications, this plug is specified with a flat seat, 14 mm thread diameter, 5/8 hex, and 0.75 reach.

Key Features

• NGK Laser Iridium Spark Plug line for OE-style ignition performance
• Iridium center electrode tip for consistent spark characteristics
• Nickel ground electrode with standard ground configuration
• 0.044 in pre-gap for the listed BMW fitments
• 5000 ohm resistance for ignition system compatibility
• Flat seat, 14 mm thread diameter, 0.75 reach, 5/8 hex
• OE reference part number IZFR6H11, stock number 4294

Detailed Description

NGK 4294 is a Laser Iridium spark plug engineered around OE specifications for select BMW V8 applications. The iridium center electrode supports precise ignition performance, while the copper core and nickel ground electrode help maintain stable operation under normal service conditions. This part is listed for 2010 BMW 550i, 2010 BMW 650i, 2010 BMW X5, 2006-2009 BMW 550i, 2006-2009 BMW 650i, 2004-2009 BMW X5, 2006-2008 BMW 750i, and 2006-2008 BMW 750Li.

This part cross-references Bosch FR7KPP332 for the same application.

What It Helps Address

• Misfires caused by worn spark plug electrodes
• Hard starting related to weak ignition output
• Rough idle from inconsistent spark delivery
• Reduced throttle response from degraded plug performance
• Service replacement for BMW ignition maintenance intervals

Installation Notes and Tips

Verify the engine application against the listed fitment before installation. Confirm the 0.044 in gap specification and use the correct torque procedure for the cylinder head material. Inspect ignition coils, boots, and related secondary ignition components during service, especially on BMW 550i, 650i, X5, 750i, and 750Li models.

Quality Assurance

NGK is a long-established OE supplier with manufacturing and distribution support across North America and global markets. The brand’s OE legacy and application coverage make NGK 4294 a direct-fit service part for the listed BMW vehicles.