2PCS Upstream Oxygen O2 Sensor 1, 234-4672, SG1108 for BMW 320i 323Ci 325xi 328Ci M5 Z3 X5 COMPATIBLE WITH OEM NUMBERS: 234-4672,13477,SG1108,258003477 Oxygen Sensor O2 13477 234-4672for BMW 525i 325i 750iL Improved protection tube and increased thermal resistance prevents premature sensor failure and long warranty This is Brand New & High Quality Aftermarket Product service with Laser weld and Viton sealing system. Meet the professtional specification as OEM parts, for stable performance & durable Please check the description or use the year/make/model drop down bar and interchangeable part numbers to confirm the compatibility before purchase