Denso Glow Plug - DG-671

Ensure your vehicle starts reliably in cold conditions with the Denso DG-671 glow plug. Denso is a...

Best current price£16.76from Autodoc

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AutodocDENSO Glow plug TOYOTA DG-671 1985064060,1985064061,1985067020 Glow plugs,Glow plugs diesel,Diesel glow plugs,Heater plugs 1985067030
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My Motor WorldDenso Dg-671 Glow Plug (Single)
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eBayGlow plug DG-671 DENSO for TOYOTA LAND CRUISER LAND CRUISER Hardtop 4 RUNNER II
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Product Information

Full details

The Denso DG-671 glow plug is designed for vehicle owners and diesel technicians who require reliable cold-weather starting and OE-level performance. This component excels at delivering rapid, consistent heating to combustion chambers, though users must be diligent about verifying exact engine compatibility before purchase to ensure correct fitment and electrical specifications.

All features

Model Part NumberDG-671
BrandDenso

Extended Product Information

FAQs

What is the recommended tightening torque?

The recommended tightening torque for the DG-671 is 15-20 Nm.

What size wrench do I need?

You will need a 12mm spanner or socket for this specific model.

Is this an OE part?

Yes, Denso is a global OE manufacturer, and this part meets or exceeds original equipment standards.

What is the thread size of the DG-671?

The thread size is M10x1.25.

Does it matter if I only replace one glow plug?

While you can replace one, it is often recommended to replace them as a set to ensure even heating across all cylinders.

What is the total length of the unit?

The overall length of the DG-671 is 100.3mm.

Troubleshooting

Engine hard to start in cold weather

Check the glow plug control module and ensure all glow plugs are receiving the correct 11V input.

Glow plug light remains illuminated on dash

Test each glow plug for continuity; a dead plug can trigger a system fault code.

Difficulty threading the plug into the cylinder head

Stop immediately, clean the threads thoroughly, and check for cross-threading on the cylinder head port.

Pros and Cons

Pros

  • Meets or exceeds original equipment specifications
  • Double coil design for efficient heating
  • Highly durable construction for longevity
  • Precise M10x1.25 thread dimensions

Cons

  • Specific compatibility required for correct operation
  • Requires professional torque application during installation
  • Not intended for non-diesel engines

Setup, Compatibility & Care

Proper installation is critical for the longevity of the DG-671. Before starting, confirm that your vehicle's engine requires an 11V glow plug with a thread size of M10x1.25.

  1. Preparation: Ensure the engine is cool to the touch to prevent damage to the cylinder head threads.
  2. Removal: Use a 12mm spanner to carefully extract the old glow plug.
  3. Cleaning: Clean the glow plug port of carbon buildup to ensure proper seating of the new unit.
  4. Installation: Thread the new plug by hand to prevent cross-threading. Use a torque wrench to tighten the unit to the specified range of 15-20 Nm.
  5. Wiring: Reconnect the electrical harness and verify that the connector is free of corrosion for consistent current flow.

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