Bosch Glow Plugs Set of 4 for Navara D21 SD25 2.5L Diesel 1986-1987

PRODUCT OVERVIEW

Set of 4 Bosch diesel glow plugs designed for Navara D21 SD25 2.5L (2488cc) engines, model years 1986–1987. These 11V plugs are engineered to operate in a 12V electrical system, ensuring reliable cold starting and stable combustion performance.

KEY FEATURES

• Set of 4 brand new Bosch glow plugs
• 11V plug specification for use in 12V systems
• Optimised for diesel cold-start performance
• Designed with the complete glow system in mind
• Manufactured using the latest diesel glow technology

SPECIFICATIONS

• Plug Voltage: 11V
• Battery/System Voltage: 12V
• Fuel Type: Diesel
• Engine: SD25 2.5L (2488cc) 4-cylinder
• Quantity: Set of 4 glow plugs
• Reference Numbers: GPN322, ZPN-02480

TECHNICAL BENEFITS

• Incorporates the latest developments from original equipment glow systems
• High durability under diesel combustion temperatures and vibration
• Consistent heating profile for smoother starting and reduced emissions
• Engineered to work with the factory glow control timer and circuitry

INSTALLATION NOTES

• Always confirm the correct application using current Bosch or OEM data before installation.
• Check glow plug timer/control unit operation to ensure correct pre-glow and after-glow periods.
• Verify injection pump timing and fuel delivery to avoid excessive heat and vibration damage.
• On older open-coil systems, ensure all resistor straps and connections are clean and corrosion-free.
• Confirm the vehicle battery is in good condition, as low voltage can reduce glow plug performance.

FITMENT INFORMATION

This is a vehicle-specific glow plug set intended for suitable Navara D21 SD25 2.5L diesel applications around 1986–1987. Always cross-check part numbers (GPN322, ZPN-02480) and your vehicle details with a trusted parts catalogue or qualified technician before purchase and installation.