Volvo Penta 12v 115a alternator for Volvo D4 D6 Diesel engines. Part #3840181.  We have been a certified Volvo dealer for over 25 years. We have many other Volvo Penta and Mercruiser parts in stock. If you do not see what you need in my store feel free to contact me at 949 394 1357 and mention this eBay add.