The product is an ENGINE COMPUTER ECM for Volkswagen Jetta, Quantum, and Scirocco models from 1982 to 1987, excluding GLI 8 valve. It is a direct replacement part with an unspecified length manufacturer warranty. The ECM comes with the manufacturer part number 0 280 800 042/321 906 263 B, and no VIN is required for installation. Returns are accepted for this product, and it is suitable for those looking to replace their ECM in a Volkswagen vehicle from the specified years and models.