Looking for a reliable crankcase ventilation valve? This VAICO V10-2270 has you covered! It's the perfect replacement part that fits multiple Volkswagen and AUDI models - we're talking about Audi A4 Avant 1.9 TDI (1994-2001), VW Passat Saloon 1.9 TDI (1996-2001), VW Sharan MPV 1.9 TDI (1995-2010), and plenty more. Works with engine codes 1Z, 1Y, and AAZ too. This thing is compatible with a bunch of equivalent part numbers including SEAT 028129101, VW 28129101, AUDI 28129101, and several others. It's basically the same quality as OEM parts but without the crazy price tag. Super important for keeping your engine running smoothly and efficiently. Super easy to install if you're handy with cars, or any mechanic can pop it in quickly. Helps maintain proper pressure in your crankcase and prevents oil leaks - super important for your engine's health. Made to last and perform just like the original equipment. Before you order, just double-check it fits your specific model using the part finder. Seriously, this is one of those small parts that makes a big difference in how your car runs. Keep your vehicle in top shape without breaking the bank!