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Discussion Starter · #1 ·
I’m trying to determine how many amps my alternator is that I will be replacing in my 2009 Jeep Patriot sport 2.4L

On ebay I see 140 amps and 120 amps. Is there a definitive way to which is the correct for my engine?

Thanks very much
Mike
 

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Try using the VIN number to get a build sheet, it should list the alternator size.

If for some reason that doesn't work, PM JeepCares with your VIN, they should be able to tell you.
 

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Discussion Starter · #3 ·
Thanks very much for this info. Using your link and instructions I was able to find out that it is a 120 amp alternator.

I have an off topic question I wonder if you might know the answer to. I accidentally purchased disc rotors and brakes for the rear of my jeep. I foolishly assumed that because my front brakes were disc, my back would be too but they are drum brakes.

Im curious though- Could I use these back rotors to replace my front rotors ? I guess I’m essentially asking in back disc rotors and front disc rotors are interchangeable.

thanks very much for all your help
Mike

Try using the VIN number to get a build sheet, it should list the alternator size.

If for some reason that doesn't work, PM JeepCares with your VIN, they should be able to tell you.
 

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No, they are not interchangeable.
 

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Thanks very much for this info. Using your link and instructions I was able to find out that it is a 120 amp alternator.

I have an off topic question I wonder if you might know the answer to. I accidentally purchased disc rotors and brakes for the rear of my jeep. I foolishly assumed that because my front brakes were disc, my back would be too but they are drum brakes.

Im curious though- Could I use these back rotors to replace my front rotors ? I guess I’m essentially asking in back disc rotors and front disc rotors are interchangeable.

thanks very much for all your help
Mike
You're welcome Mike

No, the rotors won't interchange.
 
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