You have to pull off all the drive belts first.
Them take a 27mm socket to pull off the pulley.
Them use your two hands and pull off the pulley if
that don't work garb a puller to pull it off.
Them you will see the oil seal.
yes you do
The 2003 Nissan Sentra has 52.1 in. of front hip room.
The 2013 Nissan Sentra has 42.5 in. of front leg room.
The 2005 Nissan Sentra has 41.6 in. of front leg room.
The 2014 Nissan Sentra has 42.5 in. of front leg room.
The 2010 Nissan Sentra has 54.1 in. of front hip room.
The 2013 Nissan Sentra has 54.7 in. of front shoulder room.
The 2004 Nissan Sentra has 41.6 in. of front leg room.
The 2003 Nissan Sentra has 52.5 in. of front shoulder room.
The 2012 Nissan Sentra has 56.9 in. of front shoulder room.
The 2010 Nissan Sentra has 42.4 in. of front leg room.
The 2005 Nissan Sentra has 39.9 in. of front head room.