Hi Robert, I'm pleased to assist you. No, this alternator is not water coolant. It is an air-cooled alternator. Most modern vehicles use air-cooled alternators. Water-cooled alternators are more commonly used in heavy-duty vehicles and vehicles that operate in extreme environments. If you're interested in this alternator, you can use the link below to directly place your order. Take advantage of our low price and limited stocks. I hope this helps, and enjoy shopping! https://www.carparts.com/alternator/wai/wai13815n?can=CPGG4850_CSQA_20231208

Hi Kash’Mere, I'm pleased to assist you. Yes, we do, for remanufactured parts. This alternator, on the other hand, is brand new and does not require a core. You can go ahead and use the link below to directly place your order. Take advantage of our low price and limited stocks. I hope this helps, and enjoy shopping! https://www.carparts.com/alternator/wai/wai13815n?can=CPGG4850_CSQA_20231201

Hi Trevor, I'm glad to assist you. Yes. All vehicle alternators have an internal voltage regulator. Grab our promo price, which has a 30-day post-purchase price match guarantee. Happy shopping! https://www.carparts.com/alternator/wai/wai13815n?can=cpje1043_CSQA_20230714