How to Replace Spark Plugs 06-12 Nissan Altima

Difficulty: Intermediate · About 70 min · Nissan Altima

Replace the spark plugs, including the ignition coils, on a 2006-2012 Nissan Altima.

Steps

1. Remove the ignition coils

   Remove the engine cover's three 5mm Allen bolts and the cover, remove each coil's electrical connector and 10mm retaining bolt, then remove the four coils, setting them down in cylinder order.

2. Remove the spark plugs

   Inspect the wells for debris, rust or water, then remove each plug with the spark plug socket.

3. Install the spark plugs

   Insert each plug into the well with the socket and an extension, start its threads by hand to avoid cross-threading, then torque it to about 14 ft-lb.

4. Reinstall the ignition coils

   Apply dielectric grease to each coil's boot and gasket, insert it into the spark plug tube, align its bolt holes, install the 10mm bolt, repeat for the rest, tighten all four bolts, reconnect the four electrical connectors, then refit the engine cover and its three 5mm Allen bolts.

Check your vehicle’s repair manual for exact specifications and fit.