Has an extensive selection of late model truck parts for sale. If we do not have the part you are looking for we will do our best to find it for you. Boots and Hanks Truck Parts Inc.Please make sure your part numbers and or serial numbers match the product you are purchasing. We are not responsible for a part not fitting correctly. All products are tested and certified as "quality used" before being placed into stock. VOLVO D13H ECM ECU PART#21900553 P03 DIESEL ENGINE COMPUTER MODULE. VOLVO D13H ENGINE CONTROL MODULE (ECM) P/N 21900553 P03. This is a USED VOLVO D13H Engine Control Module (ECM, ECU) Engine Computer Part# 21900553 P03. The item "VOLVO D13 ECM ECU PART#21900553 P03 DIESEL ENGINE COMPUTER MODULE" is in sale since Wednesday, June 17, 2020. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Computer, Chip, Cruise Control\Engine Computers". The seller is "heavydutytruckparts" and is located in Palmyra, Pennsylvania. This item can be shipped worldwide.