2004 Nissan Xterra Nissan charging system

Tiny
ROBERTBEALL
  • MEMBER
  • 2004 NISSAN XTERRA
  • 4.0L
  • V6
  • 4WD
  • AUTOMATIC
  • 120,000 MILES
In most 12 volt charging systems the charge rate is 13.5v to 14.5v the one I am working on is charging at a rate in excess of 17v question, Is the voltage regulator in the alternator and can it be replaced? This is also causing the batt lamp in the cluster to remain on
Monday, September 21st, 2015 AT 2:19 PM

3 Replies

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
The voltage reg can be replaced but with the miles on your unit I would recommend getting the unit o/hauled or replaced as there will be other internal components due for renewal as well and often a new alternator is the cheaper option in the long run.
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Monday, September 21st, 2015 AT 2:36 PM
Tiny
ROBERTBEALL
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  • 11 POSTS
I assumed that would be your answer, the unit looks really rough the cost of a replacement is $ 243.00 which is the best way to go. Thank you.
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Monday, September 21st, 2015 AT 5:54 PM
Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
If it was mine I would go with the new unit, yes it will cost more up front but in the long term it will be a cheaper option, a new alt will last many rears, if you do a re build you may get 2-3 at best then you are back to where you are now.
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Tuesday, September 22nd, 2015 AT 12:49 AM

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