NGK Glow Plug - YE14

A glow plug is a heating device used in diesel engines to ensure easier starting, especially in cold weather. It heats the air in the combustion chamber, allowing the diesel fuel to ignite more readily.

Symptoms include hard starting (especially when cold), rough idling after starting, or a check engine light related to the glow plug system. Electrical testing of the glow plug's resistance can confirm failure.

No, glow plugs are specifically designed for diesel engines. Gasoline engines use spark plugs for ignition.

Most modern diesel engines have one glow plug per cylinder. Check your vehicle's manual or consult a mechanic to determine the exact number required for your engine.

'OE matching quality' means the part is manufactured to meet or exceed the standards of the original equipment part, ensuring it performs comparably to the part originally installed by the manufacturer.

The NGK 5661 glow plug operates at 4.4 V and has a current strength of 7.5 A.

The thread size is M8 x 1.0, and it requires an 8 mm spanner for installation and removal.

This is often a symptom of a faulty glow plug. Test the resistance of each glow plug. If one is significantly different or reads as open circuit, it needs replacement. Ensure the glow plug relay and fuse are also functional.

Check the fuse for the glow plug system and the glow plug relay. The wiring connections to the glow plugs and the control module should also be inspected for security and corrosion.

Double-check the part number against your vehicle's specifications and the cross-reference list. Ensure you are using the correct thread size (M8 x 1.0) and that the port is free of obstructions.

Apply a penetrating oil and allow it to soak before attempting removal. Use the correct size spanner and apply steady, even pressure. If the plug is seized, professional removal may be necessary to avoid engine damage.