Sentra L4-2.5L (QR25DE) (2003)
Generator: Technical Service Bulletins
Alternator - Noise After Engine Shut-Down
Classification:
EL04-003
Reference:
NTB04-016
Date:
February 03, 2004
ALTERNATOR NOISE AFTER ENGINE SHUT OFF
APPLIED VEHICLES:
2002-04 Altima (L31)
2002-04 Sentra (B15)
APPLIED ENGINE:
QR25DE
IF YOU CONFIRM:
A low-tone whistling noise comes from the alternator for not more than 10 seconds after the engine is shut off.
ACTION:
Please note that this noise is:
^
Normal and is caused by a rotor "slow-down" function that is designed into the alternator
^
NOT a failure symptom, so do not replace the alternator for this