This is a trick question, so here is my answer.
A rebuild kit can be purchased for many (but not all) alternators. Also rebuild services are available for pretty much any alternator.
HOWEVER, by the time you send it off, pay for the rebuild and kit and wait for it to come back, you could have bought a new or re-manufactured unit. Also new and re-manufactured units come with a warranty, while paying for the service often does not include a warranty.
If you go the DIY route you'd have to buy tools and spend time with it, providing you even have the skills to do the work.
Short answer, just get a re-manufactured unit from a parts store or Amazon or whatever, you'll spend the same money, save yourself frustration and have a better product.
If your alternator is defective the best thing to do is to purchase a rebuilt alternator and trade yours in on it. Much simpler and easier than trying to rebuild it yourself.
yes, you have to rebuild it, it is usually easier and much cheaper to just buy a new alternator.
Bad ECU, replace.
It is most likely a bad diode in the alternator that is causing both lights to stay on. Or its just your alternator going out, replace alternator, and check pads an rotors.
A bad belt, a bad regulator in the alternator or bad brushes in the alternator.
It's built into the alternator. If it goes bad, unless you're pretty knowledgeable about such things, rather than try to take the alternator apart and fix it yourself I would recommend you replace the alternator.
when can fix alternator in namibia
A bad alternator will have the effect of draining the battery, resulting in dim lights, trouble starting the car and the like. It would be best to replace the alternator as soon as possible and possibly obtain a new battery. This may vary depending on how much the bad alternator has drained it. You can get your alternator and battery checked any time at Auto Zone.
about $150 for the alternator and 1/2 hr labor or shop minimum charge - my guess $215 - $225
BMW Dealer: around $1450 autozone part: $400
Change alternator or check alternator brushes
bad alternator, bad voltage regulator, bad battery, bad connections.