Alternator issues

[OBIW4N]

I have a focus cc 2.0d ... and it needs the alternator replacing.  which i have a friend prepared to help me do... trouble is i dont know which amp rating i need until i take it out... I was really wanting to have the replacement to hand when i take the knackered one out, but obviously i cant order one online to have if i'm not sure which i need.  the local garages i spoke to have been less than helpful in this as well.   hoping someone here knows the answer.-the choices are 120 amp or 150 amp

 

[FatHead1979]

11 hours ago, OBIW4N said:

I have a focus cc 2.0d ... and it needs the alternator replacing.  which i have a friend prepared to help me do... trouble is i dont know which amp rating i need until i take it out... I was really wanting to have the replacement to hand when i take the knackered one out, but obviously i cant order one online to have if i'm not sure which i need.  the local garages i spoke to have been less than helpful in this as well.   hoping someone here knows the answer.-the choices are 120 amp or 150 amp

 

The alternator will only produce the number of Amps that your car's systems need and you would always want a bit of spare alternator capacity for December mornings when you might have allsorts running.  Both should physically fit the same, personally I'd get a 150 amp version as it won't really use any more fuel but will give you more electrical "capacity" when/if needed.

[Gizza11]

Both should physically fit the same, personally I'd get a 150 amp version as it won't really use any more fuel but will give you more electrical "capacity" when/if needed.

I agree fit the biggest one that will ie the 150 amp regardless what you already have .you will notice the difference in the winter. I did this with a MK1 focus and also fitted the biggest capacity battery that would fit, never had a winter  starting issue again. Of course you could just take it to an Auto elec. and have it refurbished by them wile you wait save you all the hassle.