NGK 1208 ILZFR6D11 Laser Iridium Spark Plug for BMW N52 N54 N55 3.0L Inline-6

Vehicle Fitment

• 2006 BMW 325i (3.0L I6, N52)
• 2006 BMW 325xi (3.0L I6, N52)
• 2006 BMW 330i (3.0L I6, N52)
• 2006 BMW 330xi (3.0L I6, N52)
• 2006-2007 BMW 525i (3.0L I6, N52)
• 2006-2007 BMW 525xi (3.0L I6, N52)
• 2006-2007 BMW 530i (3.0L I6, N52)
• 2006-2007 BMW 530xi (3.0L I6, N52)
• 2008-2009 BMW 128i (3.0L I6, N52)
• 2008-2009 BMW 528i (3.0L I6, N52/N54)
• 2008 BMW 530xi (3.0L I6, N52)
• 2007-2008 BMW 328xi (3.0L I6, N52)
• 2009 BMW 328i (3.0L I6, N52/N54)
• 2009 BMW 328i xDrive (3.0L I6, N52/N54)
• 2009 BMW 528i xDrive (3.0L I6, N52/N54)
• 2007-2009 BMW X3 3.0si / xDrive30i (3.0L I6, N52)
• 2007-2008 BMW X5 3.0si (3.0L I6, N52)
• 2009 BMW X5 xDrive30i (3.0L I6, N52)
• 2006-2008 BMW Z4 3.0i (3.0L I6, N52)
• 2006-2008 BMW Z4 3.0si (3.0L I6, N52)
• 2009 BMW Z4 sDrive30i (3.0L I6, N52)

Fitment Notes

• Sold individually - BMW 3.0L inline-6 engines require 6 plugs per vehicle; order 6 for a complete set
• Primarily designed for the N52 naturally aspirated inline-6; also fits select N54 and N55 turbocharged applications - confirm engine code before ordering
• OEM cross-references: BMW 12120035915 / 12122158253 / 12120032137
• Pre-gapped at 0.044" from the factory - verify against your BMW's specified gap before installation
• Uses a tapered seat - no gasket required; torque to BMW specification to avoid damage to the cylinder head

Features

• Laser Iridium center electrode provides superior ignitability, improved throttle response, and extended service life over standard copper or platinum plugs
• Iridium's high melting point and hardness ensures minimal electrode wear even under the thermal demands of BMW's N52, N54, and N55 engines
• 98% pure copper core delivers superior heat dissipation and conductivity for consistent performance across all RPM ranges
• Nickel alloy ground electrode with standard tip provides reliable durability for BMW inline-6 applications
• 5,000-ohm resistor suppresses radio frequency interference and is fully compatible with BMW's Valvetronic and CAN-bus engine management systems
• Trivalent metal plating provides anti-corrosion and anti-seizing protection for easy future removal from aluminum cylinder heads
• Factory pre-gapped at 0.044" for direct installation without gap adjustment
• OEM-equivalent replacement for BMW part numbers 12120035915 and 12122158253

Specifications

• Part Number: 1208
• NGK Plug Code: ILZFR6D11
• Type: Laser Iridium Spark Plug
• Center Electrode Tip Material: Iridium
• Center Electrode Core Material: Copper (98% pure)
• Ground Electrode Core Material: Nickel
• Ground Electrode Tip Design: Standard
• Ground Electrode Quantity: 1
• Thread Diameter: 14mm
• Hex Size: 5/8" (16mm)
• Reach: 26.5mm
• Seat Type: Tapered (no gasket)
• Insulator Height: 50.50mm
• Manufacturer Heat Range: 6
• Pre-Gap Size: 0.044" (1.1mm)
• Resistance: 5,000 ohms
• Electrical Terminal Type: Non-Removable Nut
• OEM Cross References: BMW 12120035915 / 12122158253 / 12120032137
• Quantity: Sold individually (1 plug per pack)

Included Components

• 1x NGK ILZFR6D11 Laser Iridium Spark Plug (pre-gapped at 0.044")

Product Description

The NGK 1208 (ILZFR6D11) is a Laser Iridium spark plug engineered as a direct OEM-equivalent replacement for BMW vehicles equipped with the N52, N54, and N55 3.0L inline-6 engines. It directly replaces BMW part numbers 12120035915 and 12122158253, covering a broad range of 1-, 3-, 5-, and 7-Series models, as well as the X3, X5, and Z4 from the mid-2000s through the late 2000s. The fine-wire laser-welded iridium center electrode produces a more focused, consistent spark than conventional plugs, improving combustion efficiency, cold-start reliability, and throttle response across the full RPM range of BMW's naturally aspirated and turbocharged inline-6 platforms.

Pre-gapped at 0.044" from the factory, the NGK 1208 installs directly into BMW N52, N54, and N55 cylinder heads without modification. The tapered seat design requires no gasket, and the trivalent metal plating on the shell protects against corrosion and thread seizing in BMW's aluminum heads - critical for clean future removal. With a 5,000-ohm suppressor resistor, this plug is fully compatible with BMW's Valvetronic variable valve lift system and CAN-bus electronics. Order a set of 6 for a complete engine service.