The BorgWarner Replacement Turbocharger for 04-06 Volkswagen Jetta Wagon TDI (A4 Chassis) is a direct-fit, high-performance turbocharger designed to provide improved power and torque for your VW Jetta. The turbocharger is designed to fit the A4 chassis and is a direct replacement for the factory-installed turbocharger. This turbocharger features a larger compressor wheel, a stronger turbine wheel, and an improved turbine housing for improved performance. It also features a higher boost level and a faster spool-up time. The turbocharger is also designed to reduce turbo lag and provide a smooth and responsive power delivery. This turbocharger is a great way to upgrade your VW Jetta and get more power out of your engine.