This Detroit Diesel DDEC-IV ECM is a reliable and high-quality replacement part for your Series 60 S60 Bus 12.7L engine. The part number for this item is R23519310, MTA # 178223R, 1542323/M, 23519310. The brand of this product is Detroit Diesel, a trusted and reputable brand in the industry. With a unit quantity of one, this ECM is a must-have for anyone looking to replace their current engine control module.