NGK 58939 Direct Ignition Coil Boot
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 NGK Coil on Plug Boot

NGK 58939 Direct Ignition Coil Boot

Brand NGK 58939
Length 3.94
Grade Type Premium
Boot Color Black
Part Number Cpb-fd007
Stock Number 58939
Product line NGK Coil on Plug Boot
Fits Ford, Mazda, and Mercury · 31 vehicles

OE standards. Premium ignition boot built for durability and dependable operation.

Coil-on-plug boot. A direct ignition boot for ignition system service and replacement.

Black finish. Clean, discreet appearance with a premium-grade construction.

Cross-references Anchor 2528, Beck/Arnley 175-1045 and Continental 50033 for the same application. See all 15.

$17.33Free shipping
In stock · usually ships same day before 1pm CST
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Free returns within 60 days if it doesn't fit when fitment is verified.
Not what you need? See all Direct Ignition Coil Boot options

NGK Coil on Plug Boot for Ford, Mazda, and Mercury

NGK Coil on Plug Boot 58939 is a premium direct ignition coil boot built for select Ford, Mazda, and Mercury applications. It is made for vehicles that use direct ignition coil boots instead of traditional spark plug wires, helping restore a reliable ignition connection at the plug.

Key Features

  • Premium-grade direct ignition coil boot
  • Black boot color
  • Length: 3.94 in.
  • NGK part number 58939
  • NGK CPB-FD007 reference
  • Built for coil-on-plug ignition systems

Product Details

NGK Coil on Plug Boot 58939 is part of the NGK Coil on Plug Boot line, a product family focused on ignition service parts for OE-style replacement needs. NGK draws on long-term ignition system experience and global OE expertise to produce replacement components that meet demanding durability and performance expectations. This boot is used in direct ignition setups where the coil connects directly to the spark plug, making it a practical service part for maintaining consistent ignition performance in Ford Focus, Ford Escape, Mazda 3, Mazda Tribute, Mercury Mariner, and Ford Transit Connect applications.

This part cross-references Beck/Arnley 175-1045 and Standard Ignition SPP88E for the same application.

What It Helps Address

  • Misfire caused by a worn or damaged coil boot
  • Weak spark transfer at the spark plug connection
  • Ignition performance loss from heat-aged boot material
  • Intermittent starting or rough running tied to coil boot wear
  • Service replacement for direct ignition coil boot deterioration

Installation Notes and Fitment

Compatible With 2003-2011 Ford Focus, N/A; 2005-2008 Ford Escape, N/A; 2010-2013 Ford Transit Connect, N/A; 2004-2005 Mazda 3, N/A; 2005-2006 Mazda Tribute, N/A; 2008 Mazda Tribute, N/A; 2005-2008 Mercury Mariner, N/A. Vehicle notes indicate direct ignition coil boots are required and no wires are needed for these applications. Verify the ignition system configuration before installation and inspect the coil, plug well, and surrounding components for wear or contamination.

Quality Assurance

NGK is known for ignition-focused OE expertise and manufactures premium ignition products to support durability and operational performance standards used in modern vehicle service.

This part fits 31 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersNotes
2013FordTransit Connect2.0LL44 direct ignition coil boots required, no wires needed.; NGK Coil on Plug Boot
2012FordTransit Connect2.0LL44 direct ignition coil boots required, no wires needed.; NGK Coil on Plug Boot
2011FordFocus2.0LL44 direct ignition coil boots required, no wires needed.; NGK Coil on Plug Boot
2011FordTransit Connect2.0LL44 direct ignition coil boots required, no wires needed.; NGK Coil on Plug Boot
2010FordFocus2.0LL44 direct ignition coil boots required, no wires needed.; NGK Coil on Plug Boot
2010FordTransit Connect2.0LL44 direct ignition coil boots required, no wires needed.; NGK Coil on Plug Boot
2009FordFocus2.0LL44 direct ignition coil boots required, no wires needed.; NGK Coil on Plug Boot
2008FordEscape2.3LL44 direct ignition coil boots required, no wires needed.; NGK Coil on Plug Boot
2008FordFocus2.0LL44 direct ignition coil boots required, no wires needed.; NGK Coil on Plug Boot
2008MazdaTribute2.3LL44 direct ignition coil boots required, no wires needed.; NGK Coil on Plug Boot
2008MercuryMariner2.3LL44 direct ignition coil boots required, no wires needed.; NGK Coil on Plug Boot
2007FordEscape2.3LL44 direct ignition coil boots required, no wires needed.; NGK Coil on Plug Boot
2007FordFocus2.3LL44 direct ignition coil boots required, no wires needed.; NGK Coil on Plug Boot
2007FordFocus2.0LL44 direct ignition coil boots required, no wires needed.; NGK Coil on Plug Boot
2007MercuryMariner2.3LL44 direct ignition coil boots required, no wires needed.; NGK Coil on Plug Boot
2006FordEscape2.3LL44 direct ignition coil boots required, no wires needed.; NGK Coil on Plug Boot
2006FordFocus2.3LL44 direct ignition coil boots required, no wires needed.; NGK Coil on Plug Boot
2006FordFocus2.0LL44 direct ignition coil boots required, no wires needed.; NGK Coil on Plug Boot
2006MazdaTribute2.3LL44 direct ignition coil boots required, no wires needed.; NGK Coil on Plug Boot
2006MercuryMariner2.3LL44 direct ignition coil boots required, no wires needed.; NGK Coil on Plug Boot
2005FordEscape2.3LL44 direct ignition coil boots required, no wires needed.; NGK Coil on Plug Boot
2005FordFocus2.3LL44 direct ignition coil boots required, no wires needed.; NGK Coil on Plug Boot
2005FordFocus2.0LL44 direct ignition coil boots required, no wires needed.; NGK Coil on Plug Boot
2005Mazda32.3LL44 direct ignition coil boots required, no wires needed.; NGK Coil on Plug Boot
2005Mazda32.0LL44 direct ignition coil boots required, no wires needed.; NGK Coil on Plug Boot
2005MazdaTribute2.3LL44 direct ignition coil boots required, no wires needed.; NGK Coil on Plug Boot
2005MercuryMariner2.3LL44 direct ignition coil boots required, no wires needed.; NGK Coil on Plug Boot
2004FordFocus2.3LL44 direct ignition coil boots required, no wires needed.; NGK Coil on Plug Boot
2004Mazda32.3LL44 direct ignition coil boots required, no wires needed.; NGK Coil on Plug Boot
2004Mazda32.0LL44 direct ignition coil boots required, no wires needed.; NGK Coil on Plug Boot
2003FordFocus2.3LL44 direct ignition coil boots required, no wires needed.; NGK Coil on Plug Boot
Directly replaces or cross-references 15 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Anchor — 2528Beck/Arnley — 175-1045Continental — 50033DENSO Auto Parts — 671-4283NGK — 58939PRENCO — 36-2055Standard Ignition — SPP88E35-70080252850033-1124018702443727443SPB151SPP88