Ford part FINIS 1643671 Catalog Section # Part name Qty Prod Prod date FINIS Part No. Ford Sierra MkI (1982-1986) J6.10 - Audio Equipment - Original Fit 1A Amplifier assyECU-2/ECU-2D 1 1/86 - 12/86 1643671 86BB 18T805 AB Ford Sierra MkI (1982-1986) J6.10 - Audio Equipment - Original Fit ECU-2FMarket: +CDN, +USA 1 D 2/87 - 12/88 1643671 86BB 18T805 AB