NGK 5987 Spark Plug

NGK Laser Platinum Spark Plug for BMW

NGK Laser Platinum Spark Plug 5987 is an OE-style ignition component built for specific BMW applications from 2008-2009. It uses a platinum center electrode, nickel ground electrode, and a 0.044 in pre-gap to match factory specifications for consistent secondary ignition performance.

Key Features

• Laser Platinum spark plug with platinum center electrode tip material
• 0.044 in pre-gap for OE-spec BMW applications
• Copper center electrode core for stable conductivity
• Nickel ground electrode core with standard ground configuration
• 5,000 ohm resistance for ignition system compatibility
• Flat seat, 14 mm thread diameter, 5/8 in hex size
• NGK part number 5987; manufacturer part number PLZFR6A-11S

Product Details

NGK’s Laser Platinum line is built around OE replacement requirements, with a platinum firing tip and factory-matched dimensions for vehicles that call for precise spark plug fitment. This plug is listed for BMW 128i, 323i, 328i, 328i xDrive, 328xi, 528i, 528i xDrive, 528xi, X3, X5, and Z4 applications in the 2008-2009 model years, including notes that specify a 0.044 inch gap and a 100,000-mile OE manufacturer service interval on select listings. If you are replacing worn plugs on a BMW 328i or BMW X5, part number 5987 provides the correct OE-style configuration for those applications.

This part cross-references DENSO Auto Parts 4704 and AMS Automotive 4506 for the same application.

What It Helps Address

• Rough idle caused by worn spark plug electrodes
• Hard starting from weakened ignition output
• Misfire conditions related to incorrect plug gap or wear
• Reduced throttle response from inconsistent spark delivery
• Service replacement needs on BMW 128i, 328i, 528i, X3, X5, and Z4 models

Installation Notes

Verify the vehicle’s required plug gap before installation; this NGK spark plug is pre-gapped at 0.044 inches. Confirm thread diameter, reach, seat type, and heat range against the original plug specification before service. Use proper spark plug removal and torque procedures to avoid damage to the cylinder head or ignition components.

Quality Assurance

NGK is a long-standing OE supplier and manufacturer with broad coverage across domestic and import vehicles. The brand’s manufacturing and distribution network supports consistent OE-level specifications for ignition service parts.