Spark plugs

Be sure the engine and ignition switch

Be sure the engine and ignition switch are off and that the parking brake is engaged securely.

Be sure to use the correct socket to

Be sure to use the correct socket to remove the spark plugs. An incorrect socket can damage the spark plugs.

See also:

Clutch fluid (if so equipped)
Check the clutch fluid level in the reservoir (manual transmissions only). If the fluid level is below the MIN line, add Genuine NISSAN Super Heavy Duty Brake Fluid or equivalent DOT 3 fluid up ...

Aftermarket fuel additives
NISSAN does not recommend the use of any aftermarket fuel additives (for example, fuel injector cleaner, octane booster, intake valve deposit removers, etc.) which are sold commercially. Many o ...

Air cleaner
MR20DE The air cleaner filter should not be cleaned and reused. Replace it according to the maintenance log shown in the “NISSAN Service and Maintenance Guide.” To remove the air cleane ...