Ignition Coils generate the spark for your vehicle's engine. However, ignition coils would fail due to age, overuse, or simply manufacture defects. A failing ignition coil may result in misfires, rough idle, reduced fuel efficiency, and the appearance of the check engine light. Therefore, it is important to replace your ignition coils as soon as your car starts showing these symptoms to improve the efficiency and drivability of your vehicle Compatible with for 2002-2006 Altima 2.5L L4; 2002-2008 Sentra 2.5L L4; 2002-2008 2.5L L4; 2010-2013 2.5L L4 Part Numbers Compatible with 22448-8H315, 22448-8H310, 22448-8H300, 22448-8H311, UF350, 1788319, 5C1395, C1398, UF-350, 22448-8H310, 22448-8H315, UF350, 224488H310, 224488H315, UF350 224488H3 C1398. Compatible with for Altima Sentra 02 03 04 05 06 07 08 10 11 12 13 Colour:black Material:ABS Package Contents: 4 x Ignition coils Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.