NGK U5407-49190 Ignition Coil 49190 Pencil Coil [1-Output Type]

【NGK U5407-49190 Ignition Coil 49190 Pencil Coil [1-Output Type]】
■Product Description
Role of the Ignition Coil
In internal combustion engines using spark plugs, a high voltage of 20,000 to 35,000V is required to cause a discharge in the combustion chamber during the compression stroke. An ignition coil is a type of transformer that converts the 12V battery voltage into the high voltage necessary for the spark plug to discharge. It basically consists of a primary coil, a secondary coil, and a core (iron core), and epoxy resin is filled into the case to ensure insulation between these components.

Specifications
High Voltage Generation Principle of Ignition Coils
There are various types of ignition coils, differing in appearance and the number of output terminals, but the principle of high voltage generation is the same for all. The primary coil is connected to the battery via an igniter (switch). First, the ECU (Engine Control Unit) turns the igniter ON, allowing current to flow through the primary coil. This generates a bundle of magnetic field lines called magnetic flux in the core (iron core), which is the axis of the primary coil, and the core (iron core) becomes an electromagnet. Then, when the ECU determines the engine ignition timing, it switches the igniter OFF, stopping the current to the primary coil. As a result, the core (iron core) ceases to be an electromagnet, and the magnetic flux within the core (iron core) disappears. When the magnetic flux inside the core (iron core) suddenly disappears, a high voltage is generated in the secondary coil, which shares the same core (iron core) as its axis, due to electromagnetic induction*, according to the turns ratio of the primary and secondary coils. The high voltage generated in the secondary coil causes a spark to jump across the spark plug gap, initiating the combustion of the air-fuel mixture (gasoline + air).
*A coil has the property of generating voltage when the magnetic flux passing through it changes. This phenomenon of voltage generation is called electromagnetic induction.
Since the voltage generated in a coil increases in proportion to the number of turns, ignition coils increase the winding of the secondary coil to generate high voltage.
Type: Pencil Coil [1-output type]
Ignition coils are directly attached to each spark plug, so no spark plug wires are needed. This is currently the most commonly adopted type by automobile manufacturers.
Compatible Manufacturer: Nissan
Compatible Genuine Part Number: 22448-AL61C
Compatible Models: Gloria (HY34) [2001/12~] | Skyline (CPV35/PV35) [2003/1~, 2002/1~] | Stagea 2500 (NM35) [2001/11~2004/8] / 3000 (HM35) [2001/11~2004/8] / 3500 (PM35/PNM35) [2004/8~2007/6] | Cedric (HY34) [2001/12~2004/10] | Fuga 2500 (Y50) [2004/10~2007/12] / 3500 (PNY50/PY50) [2004/10~2007/12] | Fairlady (HZ33/Z33) [2003/10~2007/12, 2002/7~2007/1]

■Image Precautions
*Images are for illustration purposes only. Includes products with different sizes and colors. Product design and specifications are subject to change without notice. Please be aware of this.

■Precautions
1. Always stop the engine before inspecting or replacing parts.
2. Please check for any oil adhesion or leakage around the plug holes. Oil adhesion or leakage can cause malfunctions.
3. Inspect and replace according to the service manual of each automobile manufacturer.
4. Please handle the connector carefully when attaching and detaching it. Damaging the connector part can lead to poor conductivity.
5. Do not use products that have been dropped, as dropping or impacting them may cause cracks or damage to internal components.
6. Please use the correct part number ignition coil as specified in this document.
7. Do not use the ignition coil described in this document for purposes other than its intended use.
8. When storing, avoid high temperatures and humidity.
9. When the engine check (MIL) lamp illuminates, be sure to clear (reset) the error code from the diagnostics (self-diagnosis/OBD) according to the service manual, etc., before (or after) replacing the ignition coil. Failure to clear the error code may lead to problems such as the engine check lamp not turning off.