Description: 135i, lower. With 335is. 128i, lower. Z4. X3. X5. Rear. 3 series. 2007-10, #1. Down stream. Left manifold. Without diesel. Right manifold. 3.0L gas, cyl 1-3. Monitor probe, front, to 10-09. Monitor probe, front, 35i & 35is. Coupe & convertible, 3.0L without turbo, lower. Sedan, wagon, without 4.0l & twin power turbo, lower. Coupe & convertible, 3.0L bi turbo, exhaust manifold cyls. 1-3, lower. Coupe & convertible, 3.0L twin power turbo, 320 hp, exhaust manifold cyls. 1-3, lower.Bank 1 Sensor 2