Learn how to replace the ignition coils on the Nissan and Infiniti 3.5L V6 engine.
While it is recommended to replace all the coils at the same time whenever possible, replacing only the faulty coil is an acceptable solution. If the coil is replaced with the same brand as the rest of the coils, you shouldn't notice any performance issues when only one coil is replaced.
This particular engine is known with code VQ35DE and is installed on many Nissan and Infiniti models such as Altima, Maxima, Murano, Pathfinder, Quest, 350z, G35 M35 and more.
What you may notice when a Nissan ignition coil fails:
Park you Nissan on level ground. Allow the engine to cool down.
Pull the hood release on your Quest to open the hood.
Disconnect the negative battery terminal.
Watch a video to learn how to perform this step.
Remove the engine cover. You will need to remove two 10 mm bolts in order to remove the engine cover.
Unplug the electrical connector from the ignition coil. Press the small tab then pull.
Do this for the rest of the ignition coils.
To replace the back coils on this particular Nissan engine, you will need to remove the intake manifold.
Remove the 10mm bolts that secure the coil in place.
Remove ignition coils
Install new ignition coils on your Nissan.
Reinstall engine cover. Connect the negative terminal and start the car.