This is a 120A Bosch Alternator for the 1999-00 Audi A4 and VW Passat With the 1.9L Engine. This Unit Has a Typical VW Mounting - Two at 6:00 and 2 at 3:00. This Unit Uses a 5-Groove Clutch Pulley. The Earlier 0-124-515-026 Will Interchange, But Has Slightly Different Internal Parts. The 90A Version is the 11209, the 90A Valeo Version is the 11207, and the 120A Valeo Version is the 11208.