NGK 59003 CPB-S004 Coil on Plug Boot Direct Ignition Coil Boot

The NGK 59003 (CPB-S004) coil on plug boot, also called a direct ignition coil boot or COP boot, connects the ignition coil to the spark plug. It carries spark energy to the plug and helps protect the engine's electronics from electrical noise. NGK builds it to original-equipment design and fit.

Key Features:

• Made from premium silicone for durability in harsh under-hood conditions
• Includes any internal springs and ferrite resistors the design requires, for consistent spark transfer and RFI/EMI noise suppression
• Built to stringent OEM tolerances for original-equipment fit
• Manufacturer part number 59003, also listed as NGK CPB-S004
• Cross-references include Standard Motor Products SPP127E, BWD SPB190, Belden 702508, DENSO 671-4309 and Prestolite 184086
• Overall length: approximately 1.97 in

Replace the coil boots whenever you change spark plugs. Worn or cracked boots can cause ignition problems such as flashover, and fitting new boots helps keep the ignition system working reliably. NGK is a leading OE supplier of ignition components.