Alternator Noise after Engine Shut Off – 2002-2004 Nissan Altima & Sentra

Classification:	Reference:	Date:
EL04-003	NTB04-016	February 3, 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