NGK 58925 Direct Ignition Coil Boot

NGK Coil on Plug Boot for OE-Style Ignition Service

The NGK Coil on Plug Boot, part number 58925, is a premium direct ignition coil boot built for vehicles that use coil-on-plug ignition service. With a black boot finish and 4.8-inch length, it supports reliable spark transfer in applications that call for a direct ignition coil boot rather than traditional plug wires.

Compatible With BMW 320i, 325i, 325is, 525i, 525iT, 530i, 540i, 740i, 740iL, 840Ci, and M3 applications from 1991-1995, this NGK Coil on Plug Boot is a fitment-focused replacement for select BMW ignition systems. Part number 58925 is also referenced as CPB-EU003.

Key Features

• Premium-grade direct ignition coil boot
• Black boot color
• 4.8-inch length
• Built for coil-on-plug ignition layouts
• OE-focused NGK ignition product line
• Part number 58925 / CPB-EU003

Product Details

NGK’s Coil on Plug Boot line is part of its ignition-focused product family, which includes spark plugs, glow plugs, ignition coils, coil-on-plug boots, and wire sets. NGK draws on extensive OE experience and automotive manufacturing expertise to produce ignition components that meet demanding durability and operational standards. This boot is intended for direct ignition systems used on select BMW models, including BMW 320i, BMW 325i, BMW 525i, and BMW M3 applications from the early 1990s.

This part cross-references DENSO Auto Parts 671-8159 for the same application.

What It Helps Address

• Cracked or worn coil boot insulation
• Misfire caused by weak spark transfer
• Ignition performance loss from aged boot material
• Moisture intrusion at the coil-to-plug connection
• Hard starting related to degraded ignition boot condition

Installation Notes and Tips

Verify the vehicle’s ignition layout before ordering. Fits 1992-1995 BMW 320i, 1992-1995 BMW 325i, 1992-1995 BMW 325is, 1991-1995 BMW 525i, 1993 BMW 525iT, and 1994-1995 BMW 530i, 540i, 740i, 740iL, 840Ci, and M3 applications with direct ignition coil boot requirements. Confirm the part number and boot length against the original component before installation.

For best results, inspect the coil, plug well, and surrounding ignition components for wear or contamination during service.

Quality Assurance

NGK manufactures premium ignition products to OE-level durability and performance expectations, supported by long-standing automotive engineering experience and global OE coverage.